# Agent Shell Transcript **Agent:** Claude Code **Started:** 2026-02-05 15:40:36 **Working Directory:** /home/sam/bin/ --- ## User (2026-02-05 15:41:38) From that lamp diffuser, make the walls grow not on the disk, but on a wall cylindrical wall that is just big enough to encompass both test.py ## Agent (2026-02-05 15:41:41) Let me first read the current file to understand what we're working with. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:41:42 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out="/home/sam/test/next/config/config/test.stl" diffuser_thickness=0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- with BuildPart(): Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Inner clip wall (grows upward from disk) --- with BuildPart(): Cylinder( radius=inner_wall_outer_radius, height=diffuser_thickness + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=diffuser_thickness + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Outer clip wall (grows upward from disk) --- with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=diffuser_thickness + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=outer_wall_inner_radius, height=diffuser_thickness + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 15:41:44) Now I understand the design. Currently: - There's a flat diffuser disk at Z=0 - Inner and outer clip walls grow upward from the disk (from Z=0) The request is to make the walls grow not from the disk, but from a cylindrical wall that is just big enough to encompass both the inner and outer walls. So the base of the walls should be a cylinder (a thin cylindrical ring) that connects the two walls at their base, instead of the flat disk. Let me think about the geometry: - The inner wall goes from `inner_wall_outer_radius - wall_thickness` to `inner_wall_outer_radius` - The outer wall goes from `outer_wall_inner_radius` to `outer_wall_inner_radius + wall_thickness` - A cylindrical wall "just big enough to encompass both" would span from the inner wall's inner radius to the outer wall's outer radius The connecting cylinder should be a vertical cylinder (ring) whose inner radius is `inner_wall_outer_radius - wall_thickness` and outer radius is `outer_wall_inner_radius + wall_thickness`, placed at the disk level (height = `diffuser_thickness`), with the clip walls growing upward from the top of that cylinder. Actually, re-reading: "make the walls grow not on the disk, but on a cylindrical wall that is just big enough to encompass both." This means replacing the flat disk with a cylindrical wall (ring) at the base, and the clip walls grow from the top of that ring instead of from the flat disk surface. The cylindrical wall spans radially from the innermost extent of the inner wall to the outermost extent of the outer wall, and has the same height as `diffuser_thickness`. Then the clip walls start at `Z = diffuser_thickness` and extend upward for `clip_depth`. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:42:00 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,35 +2,49 @@ align=(Align.CENTER, Align.CENTER, Align.MIN), ) - - - # --- Inner clip wall (grows upward from disk) --- + # --- Cylindrical base wall encompassing both clip walls --- with BuildPart(): Cylinder( - radius=inner_wall_outer_radius, - height=diffuser_thickness + clip_depth, + radius=outer_wall_inner_radius + wall_thickness, + height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, - height=diffuser_thickness + clip_depth, + height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) - # --- Outer clip wall (grows upward from disk) --- - with BuildPart(): - Cylinder( - radius=outer_wall_inner_radius + wall_thickness, - height=diffuser_thickness + clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=outer_wall_inner_radius, - height=diffuser_thickness + clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) + # --- Inner clip wall (grows upward from cylindrical base) --- + with Locations((Location((0, 0, diffuser_thickness)),)): + with BuildPart(): + Cylinder( + radius=inner_wall_outer_radius, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) + Cylinder( + radius=inner_wall_outer_radius - wall_thickness, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) + + # --- Outer clip wall (grows upward from cylindrical base) --- + with Locations((Location((0, 0, diffuser_thickness)),)): + with BuildPart(): + Cylinder( + radius=outer_wall_inner_radius + wall_thickness, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) + Cylinder( + radius=outer_wall_inner_radius, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) export_stl(diffuser.part, out) # No heading:3 ends here \ No newline at end of file ``` ## Agent (2026-02-05 15:42:03) Now let me verify it runs correctly. ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:42:21 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:42:24) The script runs without errors. Here's what changed: 1. **Cylindrical base wall added** -- A ring at Z=0 with height `diffuser_thickness`, spanning from `inner_wall_outer_radius - wall_thickness` (innermost extent of the inner wall) to `outer_wall_inner_radius + wall_thickness` (outermost extent of the outer wall). This is the minimal cylinder that encompasses both clip walls. 2. **Clip walls repositioned** -- Both inner and outer walls now start at `Z = diffuser_thickness` (the top of the cylindrical base) and extend upward for `clip_depth` only, instead of starting at Z=0. They're placed using `Locations` with a Z offset. The flat diffuser disk is still present at Z=0 as before. The clip walls now grow from the cylindrical ring rather than from the disk surface. ## User (2026-02-05 15:43:26) the ring wall should lie on top of the disk ## Agent (2026-02-05 15:43:29) The cylindrical base wall currently starts at Z=0, same as the disk. It should start at Z=`diffuser_thickness` instead, sitting on top of the disk. Then the clip walls need to shift up accordingly to start at `Z = 2 * diffuser_thickness`. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:43:39 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,22 +2,23 @@ align=(Align.CENTER, Align.CENTER, Align.MIN), ) - # --- Cylindrical base wall encompassing both clip walls --- - with BuildPart(): - Cylinder( - radius=outer_wall_inner_radius + wall_thickness, - height=diffuser_thickness, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=inner_wall_outer_radius - wall_thickness, - height=diffuser_thickness, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) + # --- Cylindrical base wall encompassing both clip walls (on top of disk) --- + with Locations((Location((0, 0, diffuser_thickness)),)): + with BuildPart(): + Cylinder( + radius=outer_wall_inner_radius + wall_thickness, + height=diffuser_thickness, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) + Cylinder( + radius=inner_wall_outer_radius - wall_thickness, + height=diffuser_thickness, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) # --- Inner clip wall (grows upward from cylindrical base) --- - with Locations((Location((0, 0, diffuser_thickness)),)): + with Locations((Location((0, 0, 2 * diffuser_thickness)),)): with BuildPart(): Cylinder( radius=inner_wall_outer_radius, ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:43:54 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:43:56) Runs without errors. Now the stacking order from bottom to top is: - **Disk** at Z=0, height `diffuser_thickness` - **Cylindrical ring wall** at Z=`diffuser_thickness`, height `diffuser_thickness`, sitting on top of the disk - **Clip walls** at Z=`2 * diffuser_thickness`, height `clip_depth`, growing upward from the ring ## User (2026-02-05 15:44:12) it should have its own variable to control its size ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:44:17 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,6 +2,7 @@ cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder +ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions ``` ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:44:27 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,18 +2,18 @@ with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, - height=diffuser_thickness, + height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, - height=diffuser_thickness, + height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Inner clip wall (grows upward from cylindrical base) --- - with Locations((Location((0, 0, 2 * diffuser_thickness)),)): + with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=inner_wall_outer_radius, ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:44:38 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:44:40) Done. Added a `ring_wall_height` parameter (set to 2mm) that independently controls the height of the cylindrical base wall. The clip walls' Z offset now uses `diffuser_thickness + ring_wall_height` accordingly. ## User (2026-02-05 15:46:38) When I increase ring_wall_height, like say to 50, I cannot see the clip wall on top of it anymore ## Agent (2026-02-05 15:46:41) The issue is that the ring wall has the same outer radius as the outer clip wall and the same inner radius as the inner clip wall — so the clip walls are completely hidden inside the ring wall. The clip walls need to grow from the top of the ring wall, not be embedded within it. Let me re-read the file to make sure I have the current state. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:46:43 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 20 diffuser_thickness = 0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- with BuildPart(): Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical base wall encompassing both clip walls (on top of disk) --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Inner clip wall (grows upward from cylindrical base) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=inner_wall_outer_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Outer clip wall (grows upward from cylindrical base) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=outer_wall_inner_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 15:46:46) I see the problem. The ring wall spans the full radial extent from `inner_wall_outer_radius - wall_thickness` to `outer_wall_inner_radius + wall_thickness`, which is exactly the same as the clip walls. Since the clip walls sit on top, they're just a continuation of the same surface and get merged into one solid — they're invisible because there's no gap or distinction. The clip walls are thinner rings (each `wall_thickness` thick) with an `edge_thickness` gap between them. The ring wall fills that gap too. So the clip walls on top are entirely contained within the ring wall's radial footprint and just look like a flat top. The fix: the clip walls need to protrude above the ring wall visibly. The issue is that since the ring wall fills the gap between the two clip walls, on top you just see a flat surface with no slot. The clip walls *are* there, they just blend in. We need to subtract the gap (the slot between the two clip walls) from the top of the ring wall — or equivalently, make the ring wall only as tall as `ring_wall_height - clip_depth` and let the clip walls fill the rest. But actually the simplest correct approach: keep the ring wall at `ring_wall_height`, but carve out the slot at the top for `clip_depth` so the two clip walls are visible. Actually, the simplest approach: just extend the clip walls to be the full `ring_wall_height + clip_depth` and remove the separate ring wall, replacing it with just a filled ring for the bottom `ring_wall_height` portion... No, that changes the design. The cleanest fix: subtract the gap between the two walls from the top `clip_depth` of the ring wall. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:47:03 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,50 +2,34 @@ align=(Align.CENTER, Align.CENTER, Align.MIN), ) - # --- Cylindrical base wall encompassing both clip walls (on top of disk) --- + # --- Cylindrical base wall with clip slot carved at the top --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): + # Full ring wall Cylinder( radius=outer_wall_inner_radius + wall_thickness, - height=ring_wall_height, + height=ring_wall_height + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, - height=ring_wall_height, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) - - # --- Inner clip wall (grows upward from cylindrical base) --- - with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): - with BuildPart(): - Cylinder( - radius=inner_wall_outer_radius, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=inner_wall_outer_radius - wall_thickness, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) - - # --- Outer clip wall (grows upward from cylindrical base) --- - with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): - with BuildPart(): - Cylinder( - radius=outer_wall_inner_radius + wall_thickness, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=outer_wall_inner_radius, - height=clip_depth, + height=ring_wall_height + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) + # Carve the slot between clip walls at the top + with Locations((Location((0, 0, ring_wall_height)),)): + Cylinder( + radius=outer_wall_inner_radius, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) + Cylinder( + radius=inner_wall_outer_radius, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) export_stl(diffuser.part, out) # No heading:3 ends here \ No newline at end of file ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:47:10 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:47:13) Runs cleanly. The approach now is a single piece: 1. A full-height ring wall (`ring_wall_height + clip_depth`) spanning the full radial extent of both clip walls 2. At the top (`ring_wall_height` up from the ring base), the slot between the two clip walls is carved out for `clip_depth` — subtracting the annular gap between `inner_wall_outer_radius` and `outer_wall_inner_radius` This way the solid ring wall transitions into two distinct clip walls at the top, and the slot is always visible regardless of `ring_wall_height`. ## User (2026-02-05 15:47:51) This is not what I want. I want the clip walls to be on top of the ring wall ## Agent (2026-02-05 15:47:54) You're right, I overcomplicated it. The issue was simply that the ring wall's radial extent completely covered the clip walls, so they were invisible on top. The fix is straightforward: the ring wall should only span between the two clip walls (filling the gap), not overlap with them radially. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:47:56 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 20 diffuser_thickness = 0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- with BuildPart(): Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical base wall with clip slot carved at the top --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): # Full ring wall Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=ring_wall_height + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=ring_wall_height + clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # Carve the slot between clip walls at the top with Locations((Location((0, 0, ring_wall_height)),)): Cylinder( radius=outer_wall_inner_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) Cylinder( radius=inner_wall_outer_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) export_stl(diffuser.part, out) # No heading:3 ends here ``` ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:48:05 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,34 +2,50 @@ align=(Align.CENTER, Align.CENTER, Align.MIN), ) - # --- Cylindrical base wall with clip slot carved at the top --- + # --- Cylindrical ring wall (on top of disk, between the two clip walls) --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): - # Full ring wall Cylinder( - radius=outer_wall_inner_radius + wall_thickness, - height=ring_wall_height + clip_depth, + radius=outer_wall_inner_radius, + height=ring_wall_height, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) + Cylinder( + radius=inner_wall_outer_radius, + height=ring_wall_height, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) + + # --- Inner clip wall (grows upward from ring wall) --- + with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): + with BuildPart(): + Cylinder( + radius=inner_wall_outer_radius, + height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, - height=ring_wall_height + clip_depth, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + mode=Mode.SUBTRACT, + ) + + # --- Outer clip wall (grows upward from ring wall) --- + with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): + with BuildPart(): + Cylinder( + radius=outer_wall_inner_radius + wall_thickness, + height=clip_depth, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) + Cylinder( + radius=outer_wall_inner_radius, + height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) - # Carve the slot between clip walls at the top - with Locations((Location((0, 0, ring_wall_height)),)): - Cylinder( - radius=outer_wall_inner_radius, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) - Cylinder( - radius=inner_wall_outer_radius, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) export_stl(diffuser.part, out) # No heading:3 ends here \ No newline at end of file ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:48:13 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:48:15) The ring wall now spans radially from `inner_wall_outer_radius` to `outer_wall_inner_radius` — just filling the gap between the two clip walls, not overlapping them. The two clip walls sit on top of the ring wall as separate, visible structures. Increasing `ring_wall_height` will raise the clip walls higher without hiding them. ## User (2026-02-05 15:49:01) This is even worse. I simply want this from bottom to top 1. a disk 2. a ring wall on top of the disk 3. two clip walls on top of the ring wall ## Agent (2026-02-05 15:49:03) You're right, the ring wall needs to encompass both clip walls radially (from `inner_wall_outer_radius - wall_thickness` to `outer_wall_inner_radius + wall_thickness`), and the clip walls sit on top of that as separate thinner rings. The previous issue was that they had the same radial extent, making the clip walls invisible. But they don't — the clip walls are each `wall_thickness` thick, while the ring wall spans the full width including the gap. So the clip walls on top will be visible as two thin rings with the slot between them. Let me re-check the radii: - Ring wall: inner = `inner_wall_outer_radius - wall_thickness`, outer = `outer_wall_inner_radius + wall_thickness` - Inner clip wall: inner = `inner_wall_outer_radius - wall_thickness`, outer = `inner_wall_outer_radius` - Outer clip wall: inner = `outer_wall_inner_radius`, outer = `outer_wall_inner_radius + wall_thickness` The clip walls are narrower than the ring wall, so they'll be visible on top. That was the original code before I changed it — the problem must have been something else. Let me just write it cleanly. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:49:09 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 20 diffuser_thickness = 0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- with BuildPart(): Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical ring wall (on top of disk, between the two clip walls) --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Inner clip wall (grows upward from ring wall) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=inner_wall_outer_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Outer clip wall (grows upward from ring wall) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=outer_wall_inner_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 15:49:11) The current ring wall only fills the gap between the two walls (`inner_wall_outer_radius` to `outer_wall_inner_radius`), which is just the `edge_thickness` (2mm). The clip walls sit beside it, not on top. I need the ring wall to span the full width encompassing both clip walls. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:49:16 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,16 +2,16 @@ align=(Align.CENTER, Align.CENTER, Align.MIN), ) - # --- Cylindrical ring wall (on top of disk, between the two clip walls) --- + # --- Cylindrical ring wall (on top of disk, encompasses both clip walls) --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): Cylinder( - radius=outer_wall_inner_radius, + radius=outer_wall_inner_radius + wall_thickness, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( - radius=inner_wall_outer_radius, + radius=inner_wall_outer_radius - wall_thickness, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:49:24 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:49:26) Done. Now the structure from bottom to top is: 1. **Disk** at Z=0, full `diffuser_radius` 2. **Ring wall** at Z=`diffuser_thickness`, height `ring_wall_height`, spanning from `inner_wall_outer_radius - wall_thickness` to `outer_wall_inner_radius + wall_thickness` (the full width covering both clip wall positions) 3. **Two clip walls** at Z=`diffuser_thickness + ring_wall_height`, height `clip_depth` — each `wall_thickness` thick with the `edge_thickness` slot between them The clip walls are thinner than the ring wall, so they'll be clearly visible sitting on top of it. ## User (2026-02-05 15:50:00) well, I don't see them ## Agent (2026-02-05 15:50:03) Let me think about this more carefully. The ring wall outer radius equals the outer clip wall outer radius, and the ring wall inner radius equals the inner clip wall inner radius. So from above, the clip walls are exactly flush with the ring wall edges — there's no visual distinction. The problem is that in an STL viewer, since the clip walls share the same outer/inner surfaces as the ring wall, they just look like a seamless extension. The only difference is the slot between them, but that slot is only `edge_thickness` (2mm) wide on an 80mm diameter cylinder — easy to miss, especially at `ring_wall_height=50`. Let me check — are you viewing this and literally seeing a flat top with no slot at all? That would mean the geometry is being merged incorrectly. Let me verify the actual Z positions and radii are correct by adding a quick debug print. ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python -c " cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 wall_thickness = 1.2 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 print('Ring wall:') print(f' inner radius: {inner_wall_outer_radius - wall_thickness} = {inner_wall_outer_radius - wall_thickness}') print(f' outer radius: {outer_wall_inner_radius + wall_thickness} = {outer_wall_inner_radius + wall_thickness}') print() print('Inner clip wall:') print(f' inner radius: {inner_wall_outer_radius - wall_thickness}') print(f' outer radius: {inner_wall_outer_radius}') print() print('Outer clip wall:') print(f' inner radius: {outer_wall_inner_radius}') print(f' outer radius: {outer_wall_inner_radius + wall_thickness}') print() print('Gap between clip walls:') print(f' from {inner_wall_outer_radius} to {outer_wall_inner_radius} = {outer_wall_inner_radius - inner_wall_outer_radius}mm') " ` **Tool:** execute **Timestamp:** 2026-02-05 15:50:12 **Description:** Print radii to debug geometry **Command:** /home/sam/.local/pipx/venvs/clk/bin/python -c " cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 wall_thickness = 1.2 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 print('Ring wall:') print(f' inner radius: {inner_wall_outer_radius - wall_thickness} = {inner_wall_outer_radius - wall_thickness}') print(f' outer radius: {outer_wall_inner_radius + wall_thickness} = {outer_wall_inner_radius + wall_thickness}') print() print('Inner clip wall:') print(f' inner radius: {inner_wall_outer_radius - wall_thickness}') print(f' outer radius: {inner_wall_outer_radius}') print() print('Outer clip wall:') print(f' inner radius: {outer_wall_inner_radius}') print(f' outer radius: {outer_wall_inner_radius + wall_thickness}') print() print('Gap between clip walls:') print(f' from {inner_wall_outer_radius} to {outer_wall_inner_radius} = {outer_wall_inner_radius - inner_wall_outer_radius}mm') " ``` Ring wall: inner radius: 37.8 = 37.8 outer radius: 42.2 = 42.2 Inner clip wall: inner radius: 37.8 outer radius: 39.0 Outer clip wall: inner radius: 41.0 outer radius: 42.2 Gap between clip walls: from 39.0 to 41.0 = 2.0mm ``` ## Agent (2026-02-05 15:50:14) The geometry is correct — there's a 2mm slot between the clip walls at the top. But the ring wall is 4.4mm thick total, and the slot is only 2mm. On a large piece (especially with `ring_wall_height=50`), that thin slot at the very top is likely just not visible in your viewer. Could you confirm — are you looking at it from the top/side? The slot should be visible if you zoom into the top edge. Or is the issue that the clip walls truly aren't being generated at all? I can make the slot more prominent for testing by temporarily increasing `edge_thickness`. ## User (2026-02-05 15:53:20) It's like if all of them started at z=0 ## Agent (2026-02-05 15:53:24) The `Locations` context manager in build123d likely doesn't affect nested `BuildPart` contexts the way I'm using it. The `BuildPart` probably creates geometry at the origin regardless of the `Locations` wrapper. Let me check by building the geometry differently — placing the cylinders directly without nested `BuildPart`, or using `Location` on the cylinders themselves. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:53:27 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 20 diffuser_thickness = 0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- with BuildPart(): Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical ring wall (on top of disk, between the two clip walls) --- with Locations((Location((0, 0, diffuser_thickness)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius, height=ring_wall_height, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Inner clip wall (grows upward from ring wall) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=inner_wall_outer_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=inner_wall_outer_radius - wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) # --- Outer clip wall (grows upward from ring wall) --- with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): with BuildPart(): Cylinder( radius=outer_wall_inner_radius + wall_thickness, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), ) Cylinder( radius=outer_wall_inner_radius, height=clip_depth, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT, ) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 15:53:30) The `Locations` + nested `BuildPart` approach isn't working — the Z offset is being ignored. I'll drop the nested `BuildPart` blocks and use `Align.MIN` with explicit Z positioning via the `align` parameter isn't enough — I need to just offset the cylinders directly. The simplest way: put everything in one `BuildPart` and use `Pos` (or adjust the `Cylinder` center) to place things at the right Z.## User (2026-02-05 15:54:13) Can you ask semantically build123d to start a workplane or something on the top face of the disk to start the ring wall and on top of the ring wall to start the clip walls ? ## Agent (2026-02-05 15:54:16) Let me check how build123d handles workplane positioning and face selection. ### Tool Call [completed]: "build123d faces() sort_by Axis.Z select top face BuildPart cylinder on cylinder" **Tool:** fetch **Timestamp:** 2026-02-05 15:54:59 ``` Web search results for query: "build123d faces() sort_by Axis.Z select top face BuildPart cylinder on cylinder" Links: [{"title":"Selector Tutorial — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_selectors.html"},{"title":"Tips, Best Practices and FAQ — build123d 0.10.1.dev134+gcca47ff3e documentation","url":"https://build123d.readthedocs.io/en/latest/tips.html"},{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"Tips, Best Practices and FAQ — build123d 0.9.1 documentation","url":"https://build123d.readthedocs.io/en/stable/tips.html"},{"title":"Designing a Part in build123d — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_design.html"},{"title":"Key Concepts — build123d 0.10.1.dev148+g4b5668a75 documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts.html"},{"title":"Operations — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/operations.html"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Key Concepts (builder mode) — build123d 0.10.1.dev87+ga971cbbad documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts_builder.html"},{"title":"build123d/docs/tutorial_lego.rst at dev · gumyr/build123d","url":"https://github.com/gumyr/build123d/blob/dev/docs/tutorial_lego.rst"}] Here's a comprehensive summary of how to use `faces().sort_by(Axis.Z)` to select the top face and build a cylinder on top of a cylinder in **build123d**: ## Selecting the Top Face with `faces().sort_by(Axis.Z)` in build123d ### How It Works The `sort_by` method sorts the list by relative position of the object's center to `Axis.Z`, and `[-1]` selects the last item on that list — returning the top Face of the part. ### Basic Pattern: Building a Cylinder on Top of a Cylinder The core idea is to: 1. Create an initial `Cylinder` inside a `BuildPart` context. 2. Select its top face using `.faces().sort_by(Axis.Z)[-1]`. 3. Use that face as the workplane for a new `BuildSketch` to place another shape (like a second cylinder) on top. ### Example Code (from the Selector Tutorial) A typical usage looks like this: ```python from build123d import * from ocp_vscode import * with BuildPart() as example: Cylinder(radius=10, height=3) with BuildSketch(example.faces().sort_by(Axis.Z)[-1]): RegularPolygon(radius=7, side_count=6) Circle(radius=4, mode=Mode.SUBTRACT) extrude(amount=-2, mode=Mode.SUBTRACT) ``` ### Placing a Second Cylinder on Top To build a cylinder on top of another cylinder, you would use a similar approach: ```python from build123d import * with BuildPart() as part: Cylinder(radius=10, height=5) # First cylinder with BuildSketch(part.faces().sort_by(Axis.Z)[-1]): # Select top face Circle(radius=5) # Sketch for the second cylinder extrude(amount=3) # Extrude upward to create second cylinder ``` ### Alternative Example (from Key Concepts) You can also use `Plane()` wrapping: ```python with BuildPart() as example_part: with BuildSketch() as base_sketch: Rectangle(20, 20) extrude(amount=10) # Create a base block with BuildSketch(Plane(example_part.faces().sort_by(Axis.Z).last)) as cut_sketch: Circle(5) extrude(amount=-5, mode=Mode.SUBTRACT) # Subtract a cylinder ``` ### Using `Locations` Instead of `BuildSketch` You can also use `Locations` with `sort_by` to directly place 3D objects like holes: ```python a, b = 40, 4 with BuildPart() as ex13: Cylinder(radius=50, height=10) with Locations(ex13.faces().sort_by(Axis.Z)[-1]): with PolarLocations(radius=a, count=4): CounterSinkHole(radius=b, counter_sink_radius=2 * b) ``` ### Selecting Bottom vs. Top Face Use `[0]` for the bottom face and `[-1]` for the top: ```python with BuildPart(Plane.XY) as example: ... with BuildSketch(example.faces().sort_by(sort_by=Axis.Z)[0]) as bottom: ... with BuildSketch(example.faces().sort_by(sort_by=Axis.Z)[-1]) as top: ... ``` ### Key Takeaways - The operand types for selectors include `Axis`, `Plane`, `SortBy`, and `GeomType`. An `Axis` is a base object with an origin and direction, with predefined values like `Axis.X`, `Axis.Y`, and `Axis.Z`. - The workplane is created from the top Face by using the `faces` method, sorted vertically, and taking the top one with `sort_by(Axis.Z)[-1]`. - The builders include methods to extract Edges, Faces, Solids, Vertices, or Wires from the objects they are building. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: **Timestamp:** 2026-02-05 15:55:00 ``` Web search results for query: "build123d BuildSketch on face of existing solid workplane" Links: [{"title":"BuildSketch — build123d 0.9.2.dev71+g2431a05 documentation","url":"https://build123d.readthedocs.io/en/latest/build_sketch.html"},{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"Operations — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/operations.html"},{"title":"Designing a Part in build123d — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_design.html"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Tips, Best Practices and FAQ — build123d 0.10.1.dev134+gcca47ff3e documentation","url":"https://build123d.readthedocs.io/en/latest/tips.html"},{"title":"About — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/"},{"title":"Key Concepts (builder mode) — build123d 0.10.1.dev87+ga971cbbad documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts_builder.html"},{"title":"Tips, Best Practices and FAQ — build123d 0.9.1 documentation","url":"https://build123d.readthedocs.io/en/stable/tips.html"},{"title":"BuildPart — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/build_part.html"}] Here's a comprehensive overview of how to use **BuildSketch** on a face of an existing solid as a workplane in **build123d**: ## Overview The `BuildSketch` class accepts `*workplanes` which can be of type `Face`, `Plane`, or `Location`. This means you can pass a face from an existing solid directly as the workplane for your sketch. ## How It Works All sketch construction is done within `sketch_local` on `Plane.XY`.(no content)Once the sketch is complete, it's applied like a sticker to all of the workplanes passed in step 1.(no content)`BuildSketch` accepts a `Plane` or a `Face`, so you can locate the sketch on the top of the part.(no content)Note that the face used as input to `BuildSketch` needs to be Planar or unpredictable behavior can result. ## Common Patterns ### 1. Selecting a face with `sort_by` and using it directly Here is an example of using a Builder to create a simple part where a `BuildSketch` is placed on a face of an existing solid: ```python with BuildPart() as example_part: with BuildSketch() as base_sketch: Rectangle(20, 20) extrude(amount=10) with BuildSketch(Plane(example_part.faces().sort_by(Axis.Z).last)) as cut_sketch: Circle(5) extrude(amount=-5, mode=Mode.SUBTRACT) ``` ### 2. Passing the face directly (e.g., the bottle example) In the bottle example, a face sorted by axis is passed directly to `BuildSketch`: ```python with BuildSketch(ex29.faces().sort_by(Axis.Z)[-1]): Circle(t) extrude(amount=n) ``` ### 3. Using multiple faces as workplanes simultaneously You are not limited to a single workplane at a time. All six faces of a box can be used to define workplanes which are then used to position sketches: ```python with bd.BuildPart() as bp: bd.Box(3, 3, 3) with bd.BuildSketch(*bp.faces()): bd.Rectangle(1, 2, rotation=45) bd.extrude(amount=0.1) ``` ### 4. Creating a workplane from an angled face For non-axis-aligned faces, you can extract the face and create a workplane from it manually: ```python display_face = ( controller.faces() .filter_by(GeomType.PLANE) .filter_by_position(Axis.Z, 50, 70)[0] ) display_workplane = Plane( origin=display_face.center(), x_dir=(1, 0, 0), z_dir=display_face.normal_at() ) ``` ### 5. Sketching on the front face (tutorial example) In the bracket tutorial, a slot is sketched on the front face: `bracket.faces()` retrieves all faces, `sort_by(Axis.Y)` sorts them along the Y-axis, and `[0]` selects the face at the lowest Y-coordinate (the nearest face). ```python with BuildSketch(bracket.faces().sort_by(Axis.Y)[0]): SlotOverall(20 * MM, hole_diameter) extrude(amount=-thickness, mode=Mode.SUBTRACT) ``` ## Important Tips - When creating a sketch not on the default `Plane.XY`, users may expect that they are drawing directly on the workplane/coordinate system provided. However, all selectors work off global coordinates, so selection of features like the "top right" of a sketch on a rotated plane would be quite challenging and would likely change if the sketch was ever moved. Internally, sketching is always done on `Plane.XY` and then mapped onto the target workplane. - Workplanes can be generated on any plane, which allows users to put a workplane where they are working and then work in local 2D coordinate space. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: **Timestamp:** 2026-02-05 15:55:05 ``` Web search results for query: "build123d BuildPart place geometry on top face sort_by faces example" Links: [{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"Selector Tutorial — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_selectors.html"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Designing a Part in build123d — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_design.html"},{"title":"BuildPart — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/build_part.html"},{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Introductory Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/v0.10.0/introductory_examples.html"},{"title":"build123d/docs/tutorial_lego.rst at dev · gumyr/build123d","url":"https://github.com/gumyr/build123d/blob/dev/docs/tutorial_lego.rst"},{"title":"About — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/"},{"title":"Key Concepts (builder mode) — build123d 0.10.1.dev87+ga971cbbad documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts_builder.html"}] Here are the search results for your query about **build123d BuildPart placing geometry on the top face using `sort_by` with faces**: ## Overview In build123d, a common pattern is to place new geometry (like a sketch) on the top face of an existing part. This is done by selecting the top face using `sort_by(Axis.Z)[-1]` on the part's faces and passing it to `BuildSketch`. ## How `sort_by` Works with Faces The first sub-step is extracting all of the Faces from the part being built. The `BuildPart` instance (e.g., `example`) provides `example.faces()`, which extracts all of the Faces into a custom Python list — a `ShapeList`. The next sub-step is to sort the `ShapeList` of Faces by their position with respect to the Z Axis. The `sort_by` method sorts the list by the relative position of the object's center to `Axis.Z`, and `[-1]` selects the last item on that list — returning the top Face of the part. ## Key Pattern **`BuildSketch` accepts a `Plane` or a `Face`**, so you can locate the Sketch on the top of the part. Note that the face used as input to `BuildSketch` needs to be Planar or unpredictable behavior can result. ## Example 1: Hexagonal Hole on Top Face (Selector Tutorial) A cylinder is created and then a hexagonal cutout is placed on its top face: ```python from build123d import * from ocp_vscode import * with BuildPart() as example: Cylinder(radius=10, height=3) with BuildSketch(example.faces().sort_by(Axis.Z)[-1]): RegularPolygon(radius=7, side_count=6) Circle(radius=4, mode=Mode.SUBTRACT) extrude(amount=-2, mode=Mode.SUBTRACT) ``` The sketch describes the hexagonal hole to be made in the Cylinder. The extrude with `amount=-2` indicates extruding into the part and `mode=Mode.SUBTRACT` instructs the builder to subtract this hexagonal shape from the part. ## Example 2: Box with Pentagonal Cutouts (Introductory Example 11) `GridLocations` can be used to create a grid of points that simultaneously place 4 pentagons. `extrude()` can be used with a negative amount and `Mode.SUBTRACT` to cut these from the parent. ```python length, width, thickness = 80.0, 60.0, 10.0 with BuildPart() as ex11: Box(length, width, thickness) chamfer(ex11.edges().group_by(Axis.Z)[-1], length=4) fillet(ex11.edges().filter_by(Axis.Z), radius=5) Hole(radius=width / 4) fillet(ex11.edges(Select.LAST).sort_by(Axis.Z)[-1], radius=2) with BuildSketch(ex11.faces().sort_by(Axis.Z)[-1]) as ex11_sk: with GridLocations(length / 2, width / 2, 2, 2): RegularPolygon(radius=5, side_count=5) extrude(amount=-thickness, mode=Mode.SUBTRACT) ``` ## Example 3: Bottle Neck on Top Face In the classic OCC bottle example, a neck is added on top of the bottle body by building a sketch on the top face: ```python with BuildSketch(ex29.faces().sort_by(Axis.Z)[-1]): Circle(t) extrude(amount=n) ``` ## Example 4: Workplane Concept (Bottom and Top) Workplanes can be generated on any plane, allowing users to put a workplane where they are working and then work in local 2D coordinate space: ```python with BuildPart(Plane.XY) as example: ... # a 3D-part with BuildSketch(example.faces().sort_by(sort_by=Axis.Z)[0]) as bottom: ... with BuildSketch(example.faces().sort_by(sort_by=Axis.Z)[-1]) as top: ... ``` Here, `[0]` selects the **bottom** face and `[-1]` selects the **top** face. ## Example 5: CounterBoreHole on Top Face In the oval flanged bearing unit example, a `CounterBoreHole` is placed on the top face using `Locations`: ```python with Locations(oval_flanged_bearing_unit.faces().sort_by(Axis.Z)[-1]): CounterBoreHole(14 / 2, 47 / 2, 14) ``` ## Example 6: Lego Tutorial In the Lego tutorial, the workplane is created from the top Face of the Lego block by using the `faces` method and then sorted vertically, taking the top one with `sort_by(Axis.Z)[-1]`. On the new workplane, a grid of locations is created and Cylinders are positioned at each location. ## Summary The key pattern is: 1. **Extract faces** from the part: `part.faces()` 2. **Sort by axis** (usually Z for top): `.sort_by(Axis.Z)` 3. **Select the face**: `[-1]` for the topmost, `[0]` for the bottommost 4. **Pass to `BuildSketch` or `Locations`** to place new geometry on that face REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: Fetch https://build123d.readthedocs.io/en/latest/key_concepts_builder.html **Tool:** fetch **Timestamp:** 2026-02-05 15:55:22 ``` # BuildSketch with Faces as Workplanes ## Key Concept BuildSketch can accept face objects as workplanes, allowing you to position sketches directly on existing solid geometry. This enables sequential feature creation on different surfaces of a part. ## How It Works According to the documentation, "workplanes can be created from faces as well." When you pass a face to BuildSketch, it automatically orients the sketch to that face's plane, eliminating manual coordinate calculations. ## Code Examples **Single face from an existing part:** ```python with BuildPart() as example: Box(10, 10, 10) with BuildSketch(example.faces().sort_by(Axis.Z)[-1]) as top: Circle(5) ``` **Multiple faces simultaneously:** ```python with BuildPart() as bp: Box(3, 3, 3) with BuildSketch(*bp.faces()): Rectangle(1, 2, rotation=45) extrude(amount=0.1) ``` ## Key Features - Face-based workplanes automatically reverse the normal direction when appropriate - Multiple sketches can be created on different faces in sequence - Sketch coordinates remain local to each face's plane - Subsequent operations (like extrude) work seamlessly with face-positioned sketches ``` ### Tool Call [completed]: **Timestamp:** 2026-02-05 15:55:23 ``` # Using faces().sort_by(Axis.Z) for Top Face Selection ## Code Example The tutorial demonstrates selecting the top face to build a sketch: ```python with BuildPart() as example: Cylinder(radius=10, height=3) with BuildSketch(example.faces().sort_by(Axis.Z)[-1]): RegularPolygon(radius=7, side_count=6) Circle(radius=4, mode=Mode.SUBTRACT) ``` ## How sort_by Works The `sort_by(Axis.Z)` method arranges faces according to "their position with respect to the Z Axis" by evaluating "the relative position of the object's center to the `Axis.Z`." ## Understanding List Selection - **`[-1]`**: Selects the **last item** in the sorted list, returning the topmost face (highest Z coordinate) - **`[0]`**: Would select the first item, returning the bottommost face (lowest Z coordinate) ## Key Insight The tutorial emphasizes that this approach avoids "the classic CAD 'Topological naming problem'" by dynamically identifying features through geometric properties rather than static references that could become obsolete as designs change. ``` ### Tool Call [completed]: Fetch https://build123d.readthedocs.io/en/latest/introductory_examples.html **Tool:** fetch **Timestamp:** 2026-02-05 15:55:34 ``` # Building Geometry on Existing Geometry Using Faces ## Example 29: The Classic OCC Bottle This example demonstrates stacking a neck cylinder on top of an extruded bottle body using face selection: **Builder Mode:** ```python L, w, t, b, h, n = 60.0, 18.0, 9.0, 0.9, 90.0, 6.0 with BuildPart() as ex29: with BuildSketch(Plane.XY.offset(-b)) as ex29_ow_sk: with BuildLine() as ex29_ow_ln: l1 = Line((0, 0), (0, w / 2)) l2 = ThreePointArc(l1 @ 1, (L / 2.0, w / 2.0 + t), (L, w / 2.0)) l3 = Line(l2 @ 1, ((l2 @ 1).X, 0, 0)) mirror(ex29_ow_ln.line) make_face() extrude(amount=h + b) fillet(ex29.edges(), radius=w / 6) with BuildSketch(ex29.faces().sort_by(Axis.Z)[-1]): Circle(t) extrude(amount=n) ``` The key technique: `ex29.faces().sort_by(Axis.Z)[-1]` retrieves the highest face, where the subsequent neck geometry gets positioned and extruded upward. **Algebra Mode:** ```python ex29 = extrude(sk29, -(h + b)) ex29 = fillet(ex29.edges(), radius=w / 6) neck = Plane(ex29.faces().sort_by().last) * Circle(t) ex29 += extrude(neck, n) ``` This pattern—selecting the topmost face and using it as a plane for new geometry—enables efficient vertical stacking without manual coordinate calculations. ``` ### Tool Call [completed]: Research build123d workplane/face API **Tool:** think **Timestamp:** 2026-02-05 15:56:02 **Description:** Research build123d workplane/face API ``` Here is a comprehensive summary of how to place geometry on top of existing geometry in build123d's `BuildPart` context. --- ## 1. Selecting the Top Face of an Existing Solid Inside a `BuildPart` context, the builder object (e.g., `part`) exposes a `.faces()` method that returns all faces of the current solid as a `ShapeList`. You then use `.sort_by(Axis.Z)` to sort those faces by the Z-coordinate of their center, and index into the result: - **`[-1]`** -- the last element, i.e., the face with the highest Z center (the **top** face) - **`[0]`** -- the first element, i.e., the face with the lowest Z center (the **bottom** face) ```python top_face = part.faces().sort_by(Axis.Z)[-1] # topmost face bottom_face = part.faces().sort_by(Axis.Z)[0] # bottommost face ``` You can also use `.last` instead of `[-1]`: ```python top_face = part.faces().sort_by(Axis.Z).last ``` The key advantage of this approach is that it avoids the "topological naming problem" -- you are selecting faces by their geometric properties rather than by fragile internal IDs that can change when the model is rebuilt. --- ## 2. Using BuildSketch on a Face to Start New Geometry `BuildSketch` accepts `Face`, `Plane`, or `Location` objects as its workplane arguments. When you pass a face from an existing solid, the sketch is automatically oriented to that face's plane. All drawing inside the `BuildSketch` block then happens in local 2D coordinates on that face. ### Pattern A: Pass the face directly ```python with BuildPart() as part: Cylinder(radius=10, height=5) with BuildSketch(part.faces().sort_by(Axis.Z)[-1]): Circle(radius=5) extrude(amount=3) # extrudes upward from the top face ``` ### Pattern B: Wrap the face in a Plane explicitly ```python with BuildPart() as part: Box(20, 20, 10) with BuildSketch(Plane(part.faces().sort_by(Axis.Z).last)): Circle(radius=5) extrude(amount=-5, mode=Mode.SUBTRACT) ``` ### Pattern C: Use multiple faces simultaneously You can pass all faces at once to create features on every face of a solid: ```python with BuildPart() as bp: Box(3, 3, 3) with BuildSketch(*bp.faces()): Rectangle(1, 2, rotation=45) extrude(amount=0.1) ``` **Important note**: The face passed to `BuildSketch` must be planar. Passing a curved face will produce unpredictable results. --- ## 3. The Canonical "Cylinder on Top of Cylinder" Pattern Here is the exact pattern for placing a smaller cylinder on top of a larger one: ```python from build123d import * with BuildPart() as part: # Step 1: Create the base cylinder Cylinder(radius=10, height=5) # Step 2: Select the top face and sketch a circle on it with BuildSketch(part.faces().sort_by(Axis.Z)[-1]): Circle(radius=5) # Step 3: Extrude upward to create the second cylinder extrude(amount=3) ``` The flow is: 1. `Cylinder(radius=10, height=5)` creates the base solid inside `BuildPart`. 2. `part.faces()` extracts all faces of that solid. `.sort_by(Axis.Z)` sorts them by their center's Z coordinate. `[-1]` picks the topmost one. 3. That face is passed to `BuildSketch`, which orients the sketch plane to it. 4. `Circle(radius=5)` draws a circle on that top face. 5. `extrude(amount=3)` extrudes the sketch upward (positive Z, away from the face), adding material to the part. The default mode is `Mode.ADD`, so the new cylinder is fused with the base. --- ## 4. Other Useful Selector Patterns ### Sort by other axes ```python front_face = part.faces().sort_by(Axis.Y)[0] # nearest face along Y back_face = part.faces().sort_by(Axis.Y)[-1] # farthest face along Y ``` ### Using `Locations` instead of `BuildSketch` For placing 3D primitives like holes directly on a face, you can use `Locations`: ```python with BuildPart() as part: Cylinder(radius=50, height=10) with Locations(part.faces().sort_by(Axis.Z)[-1]): with PolarLocations(radius=40, count=4): CounterSinkHole(radius=4, counter_sink_radius=8) ``` ### The classic OCC bottle example (neck on body) This is the most canonical "stacking" example in the build123d documentation: ```python L, w, t, b, h, n = 60.0, 18.0, 9.0, 0.9, 90.0, 6.0 with BuildPart() as bottle: with BuildSketch(Plane.XY.offset(-b)) as body_sketch: with BuildLine() as body_line: l1 = Line((0, 0), (0, w / 2)) l2 = ThreePointArc(l1 @ 1, (L / 2.0, w / 2.0 + t), (L, w / 2.0)) l3 = Line(l2 @ 1, ((l2 @ 1).X, 0, 0)) mirror(body_line.line) make_face() extrude(amount=h + b) fillet(bottle.edges(), radius=w / 6) # Place the neck on top of the bottle body with BuildSketch(bottle.faces().sort_by(Axis.Z)[-1]): Circle(t) extrude(amount=n) ``` --- ## Summary | Goal | Code | |---|---| | Get top face | `part.faces().sort_by(Axis.Z)[-1]` | | Get bottom face | `part.faces().sort_by(Axis.Z)[0]` | | Sketch on a face | `with BuildSketch(face): ...` | | Sketch on all faces | `with BuildSketch(*part.faces()): ...` | | Add cylinder on top | Sketch a `Circle` on the top face, then `extrude(amount=height)` | | Cut into the top | Sketch a shape on the top face, then `extrude(amount=-depth, mode=Mode.SUBTRACT)` | Sources: - [Selector Tutorial](https://build123d.readthedocs.io/en/latest/tutorial_selectors.html) - [Key Concepts (builder mode)](https://build123d.readthedocs.io/en/latest/key_concepts_builder.html) - [Introductory Examples](https://build123d.readthedocs.io/en/latest/introductory_examples.html) - [Designing a Part in build123d](https://build123d.readthedocs.io/en/latest/tutorial_design.html) - [BuildPart Documentation](https://build123d.readthedocs.io/en/stable/build_part.html) - [BuildSketch Documentation](https://build123d.readthedocs.io/en/latest/build_sketch.html) - [Tips, Best Practices and FAQ](https://build123d.readthedocs.io/en/latest/tips.html) - [build123d GitHub Repository](https://github.com/gumyr/build123d) agentId: a972730 (for resuming to continue this agent's work if needed) ``` ## Agent (2026-02-05 15:56:05) Now I know the pattern. Use `BuildSketch` on the top face + `extrude` instead of nested `BuildPart` with `Locations`. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:56:14 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,57 +2,27 @@ with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- - with BuildPart(): - Cylinder( - radius=diffuser_radius, - height=diffuser_thickness, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) + Cylinder( + radius=diffuser_radius, + height=diffuser_thickness, + align=(Align.CENTER, Align.CENTER, Align.MIN), + ) - # --- Cylindrical ring wall (on top of disk, between the two clip walls) --- - with Locations((Location((0, 0, diffuser_thickness)),)): - with BuildPart(): - Cylinder( - radius=outer_wall_inner_radius, - height=ring_wall_height, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=inner_wall_outer_radius, - height=ring_wall_height, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) + # --- Cylindrical ring wall (on top of disk) --- + with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): + Circle(outer_wall_inner_radius + wall_thickness) + Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) + extrude(amount=ring_wall_height) - # --- Inner clip wall (grows upward from ring wall) --- - with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): - with BuildPart(): - Cylinder( - radius=inner_wall_outer_radius, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=inner_wall_outer_radius - wall_thickness, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) - - # --- Outer clip wall (grows upward from ring wall) --- - with Locations((Location((0, 0, diffuser_thickness + ring_wall_height)),)): - with BuildPart(): - Cylinder( - radius=outer_wall_inner_radius + wall_thickness, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) - Cylinder( - radius=outer_wall_inner_radius, - height=clip_depth, - align=(Align.CENTER, Align.CENTER, Align.MIN), - mode=Mode.SUBTRACT, - ) + # --- Clip walls (on top of ring wall) --- + with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): + # Inner clip wall + Circle(inner_wall_outer_radius) + Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) + # Outer clip wall + Circle(outer_wall_inner_radius + wall_thickness) + Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) + extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here \ No newline at end of file ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:56:24 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:56:26) This should now work properly. The approach uses `BuildSketch` on the top face of the existing geometry: 1. **Disk** — a `Cylinder` at Z=0 2. **Ring wall** — sketch an annular ring on the disk's top face, `extrude` upward by `ring_wall_height` 3. **Clip walls** — sketch the two thin annular rings on the ring wall's top face, `extrude` upward by `clip_depth` Each step builds on the actual top face of the previous geometry, so Z positioning is handled semantically by build123d. ## User (2026-02-05 15:57:00) I can only see the outer clip wall ## Agent (2026-02-05 15:57:03) The problem is that when selecting `diffuser.faces().sort_by(Axis.Z)[-1]`, after extruding the ring wall, there are multiple faces at the top Z level — the top of the ring wall is an annular face, but the top of the disk (the part outside the ring wall) is also at a lower Z. However, the ring wall top face is the highest. The real issue is that the ring wall's top face is a single annular face. When I sketch the two clip walls on it, both sketches are on the same face. But the inner clip wall's circle at `inner_wall_outer_radius` is smaller than the ring wall's inner radius (`inner_wall_outer_radius - wall_thickness`), so the inner clip wall sketch falls inside the hole of the annular face — it's not on the face at all. Wait, let me reconsider. The inner clip wall outer radius is `inner_wall_outer_radius = 39.0`, and the ring wall inner radius is `inner_wall_outer_radius - wall_thickness = 37.8`. So the inner clip wall (37.8 to 39.0) does sit on the ring wall face (37.8 to 42.2). Similarly the outer clip wall (41.0 to 42.2) sits on it too. Both should work. Actually, the problem might be that `sort_by(Axis.Z)[-1]` after the ring wall extrusion picks just one face — the ring wall annular top. But the `Circle` operations in the sketch create concentric circles, and since the sketch is on an annular face, the inner clip wall circle subtraction might be creating geometry that gets confused. Let me try selecting the face more carefully, or using a different approach for the clip walls sketch. Let me look at what faces exist after the ring wall extrusion. ### Tool Call [failed]: `/home/sam/.local/pipx/venvs/clk/bin/python3 -c " from build123d import * cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 clip_depth = 10 ring_wall_height = 20 diffuser_thickness = 0.5 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 diffuser_radius = outer_wall_inner_radius + wall_thickness + 5 with BuildPart() as diffuser: Cylinder(radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN)) with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) top_faces = diffuser.faces().sort_by(Axis.Z) for i, f in enumerate(top_faces): bb = f.bounding_box() print(f'Face {i}: Z range [{bb.min.Z:.2f}, {bb.max.Z:.2f}], type={f.geom_type()}') # Show just the top ones print() print('Faces at max Z:') max_z = max(f.bounding_box().max.Z for f in top_faces) for i, f in enumerate(top_faces): bb = f.bounding_box() if abs(bb.max.Z - max_z) < 0.01 and abs(bb.min.Z - max_z) < 0.01: print(f' Face {i}: center={f.center()}, area={f.area:.2f}') " 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:57:43 **Description:** Debug which faces exist after ring wall extrusion **Command:** /home/sam/.local/pipx/venvs/clk/bin/python3 -c " from build123d import * cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 clip_depth = 10 ring_wall_height = 20 diffuser_thickness = 0.5 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 diffuser_radius = outer_wall_inner_radius + wall_thickness + 5 with BuildPart() as diffuser: Cylinder(radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN)) with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) top_faces = diffuser.faces().sort_by(Axis.Z) for i, f in enumerate(top_faces): bb = f.bounding_box() print(f'Face {i}: Z range [{bb.min.Z:.2f}, {bb.max.Z:.2f}], type={f.geom_type()}') # Show just the top ones print() print('Faces at max Z:') max_z = max(f.bounding_box().max.Z for f in top_faces) for i, f in enumerate(top_faces): bb = f.bounding_box() if abs(bb.max.Z - max_z) < 0.01 and abs(bb.min.Z - max_z) < 0.01: print(f' Face {i}: center={f.center()}, area={f.area:.2f}') " 2>&1 ``` Exit code 1 Traceback (most recent call last): File "", line 25, in print(f'Face {i}: Z range [{bb.min.Z:.2f}, {bb.max.Z:.2f}], type={f.geom_type()}') ~~~~~~~~~~~^^ TypeError: 'GeomType' object is not callable ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python3 -c " from build123d import * cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 clip_depth = 10 ring_wall_height = 20 diffuser_thickness = 0.5 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 diffuser_radius = outer_wall_inner_radius + wall_thickness + 5 with BuildPart() as diffuser: Cylinder(radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN)) with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) top_faces = diffuser.faces().sort_by(Axis.Z) for i, f in enumerate(top_faces): bb = f.bounding_box() print(f'Face {i}: Z=[{bb.min.Z:.2f},{bb.max.Z:.2f}], center={f.center()}') " 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:57:55 **Description:** Debug faces after ring wall extrusion **Command:** /home/sam/.local/pipx/venvs/clk/bin/python3 -c " from build123d import * cylinder_diameter = 80 cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 clip_depth = 10 ring_wall_height = 20 diffuser_thickness = 0.5 inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 diffuser_radius = outer_wall_inner_radius + wall_thickness + 5 with BuildPart() as diffuser: Cylinder(radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN)) with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) top_faces = diffuser.faces().sort_by(Axis.Z) for i, f in enumerate(top_faces): bb = f.bounding_box() print(f'Face {i}: Z=[{bb.min.Z:.2f},{bb.max.Z:.2f}], center={f.center()}') " 2>&1 ``` Face 0: Z=[0.00,0.00], center=Vector(0, 0, 0) Face 1: Z=[0.00,0.50], center=Vector(-47.2, 0, 0.25) Face 2: Z=[0.50,0.50], center=Vector(0, 0, 0.5) Face 3: Z=[0.50,0.50], center=Vector(0, 0, 0.5) Face 4: Z=[0.50,20.50], center=Vector(-42.2, 0, 10.5) Face 5: Z=[0.50,20.50], center=Vector(-37.8, 0, 10.5) Face 6: Z=[20.50,20.50], center=Vector(0, 0, 20.5) ``` ## Agent (2026-02-05 15:57:58) Face 6 is the ring wall top at Z=20.5, but faces 2 and 3 are the disk top face (split into inner and outer portions by the ring wall). Face 6 is the single annular top face I need. Now the issue: when I sketch on face 6 (the ring wall top), `sort_by(Axis.Z)[-1]` correctly picks it. But the inner clip wall sketch (`Circle(39.0)` minus `Circle(37.8)`) sits exactly on the inner edge of that annular face, and the outer clip wall sketch sits on the outer edge. The problem might be that both clip wall annuli plus the gap between them exactly reconstitute the ring wall face — the sketch effectively covers the entire face except the gap. The `extrude` might then only extrude the outermost ring because the circles overlap in unexpected ways. The issue is how the circles combine in the sketch. Let me check: - `Circle(inner_wall_outer_radius)` = Circle(39.0) — a full disk - `Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT)` = subtract Circle(37.8) — leaves ring 37.8-39.0 - `Circle(outer_wall_inner_radius + wall_thickness)` = Circle(42.2) — a full disk, which **covers** the previous ring! - `Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT)` = subtract Circle(41.0) — leaves ring 41.0-42.2 The second `Circle(42.2)` in ADD mode overwrites the inner clip wall ring. I need to build the two clip walls as separate annuli without the larger circle covering the smaller one. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 15:58:07 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 20 diffuser_thickness = 0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) # --- Clip walls (on top of ring wall) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): # Inner clip wall Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) # Outer clip wall Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 15:58:10) The problem is that `Circle(outer_wall_inner_radius + wall_thickness)` in ADD mode creates a full disk of radius 42.2, which covers and overwrites the inner clip wall ring (37.8–39.0) that was just created. I need to build the outer clip wall as a ring directly, not as a large circle minus a smaller one. I'll use `Circle` with `mode=Mode.ADD` only for the rings, keeping them separate. The fix: build the outer clip wall ring first (larger radius), then the inner one, or subtract the gap from a single combined shape. The cleanest approach is to build the full annulus and then subtract the gap: ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:58:17 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,12 +2,12 @@ # --- Clip walls (on top of ring wall) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): - # Inner clip wall - Circle(inner_wall_outer_radius) - Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) - # Outer clip wall + # Full annulus covering both walls Circle(outer_wall_inner_radius + wall_thickness) + Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) + # Subtract the gap between the two clip walls Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) + Circle(inner_wall_outer_radius) extrude(amount=clip_depth) export_stl(diffuser.part, out) ``` ## Agent (2026-02-05 15:58:20) Wait, that last `Circle(inner_wall_outer_radius)` in ADD mode will re-add a full disk of radius 39.0, filling in the hole I just subtracted. Let me think about this more carefully. The sketch operations are cumulative on a 2D shape: 1. `Circle(42.2)` — full disk r=42.2 2. `SUBTRACT Circle(37.8)` — ring 37.8–42.2 3. `SUBTRACT Circle(41.0)` — removes 37.8–41.0 from the ring... no, subtracts a full disk r=41.0, leaving ring 41.0–42.2 4. `ADD Circle(39.0)` — adds back a full disk r=39.0, giving disk 0–39.0 + ring 41.0–42.2 That's wrong. I need to subtract only the annular gap (39.0–41.0) from the full ring. The correct approach: 1. `Circle(42.2)` — full disk 2. `SUBTRACT Circle(37.8)` — ring 37.8–42.2 (same as ring wall) 3. `SUBTRACT Circle(41.0)` — ring 41.0–42.2 4. `ADD Circle(39.0)` — this re-adds too much I can't do it this way with simple circle add/subtract because each circle is a full disk. I need to use `INTERSECT` or a different approach. Let me just do two separate extrusions. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 15:58:30 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,14 +2,17 @@ Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) - # --- Clip walls (on top of ring wall) --- - with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): - # Full annulus covering both walls - Circle(outer_wall_inner_radius + wall_thickness) + # --- Inner clip wall (on top of ring wall) --- + top_face = diffuser.faces().sort_by(Axis.Z)[-1] + with BuildSketch(top_face): + Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) - # Subtract the gap between the two clip walls + extrude(amount=clip_depth) + + # --- Outer clip wall (on top of ring wall) --- + with BuildSketch(top_face): + Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) - Circle(inner_wall_outer_radius) extrude(amount=clip_depth) export_stl(diffuser.part, out) ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 15:58:39 **Description:** Run the script to verify it works **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 15:58:42) This should work now. I capture `top_face` once (the ring wall's top face) and do two separate extrusions from it — one for the inner clip wall and one for the outer clip wall. Each sketch is a simple annulus that doesn't interfere with the other. ## User (2026-02-05 16:01:55) Can we imagine adding holes or something to make more light go through, while still keeping the cache so that they is no risk of skin contact with the bulb ## Agent (2026-02-05 16:01:58) Interesting idea. Let me think about this from a design perspective. The goal is to let more light through the ring wall while still preventing skin contact with the bulb. A few approaches: 1. **Holes/cutouts in the ring wall** — rows of circular holes or slots around the circumference. Light passes through but fingers can't reach the bulb if the holes are small enough. 2. **A lattice/grid pattern** — more open but still protective. 3. **Vertical slots** — narrow vertical slits around the ring wall. The key safety constraint: holes must be small enough that a child's finger can't fit through (typically <8mm diameter for child safety). Since this is a kid's lamp, that's important. For the diffuser disk, we could also add holes, but the ring wall is probably where it matters most since it's the main barrier between the bulb and the outside. Some options to consider: - **Small circular holes** in a pattern around the ring wall — e.g., 5-6mm diameter holes arranged in rows. Easy to model with `PolarLocations` and `CounterBoreHole` or just cylinders subtracted. - **Vertical slots** — narrow (e.g., 3-4mm wide) vertical cuts around the circumference. These would let convection happen too (heat rises out through the slots). - **Horizontal slots** — rings of horizontal slots around the wall. - **A honeycomb pattern** — visually appealing and structurally strong, but more complex to model. What appeals to you? And do you want holes in the ring wall only, or also in the disk? Also, what's the bulb type — LED (low heat) or incandescent? That affects how aggressively we can ventilate. ## User (2026-02-05 16:03:49) Mostly on the disk, to let the light go through it. This is for my kid to read at night, so the light should not project much shadow ## Agent (2026-02-05 16:03:52) So the idea is to make the disk more transparent to light by adding holes, while keeping the holes small enough for safety. For even light distribution with minimal shadow, a dense pattern of small holes would work well — like a perforated sheet. A few considerations: - **Hole size**: Small enough for child safety (<8mm), but numerous enough to let meaningful light through - **Pattern**: A grid or honeycomb pattern would distribute light evenly and minimize shadow artifacts. A honeycomb (hex) pattern is denser and structurally stronger than a square grid. - **Coverage**: The holes should cover the disk area but stop before the ring wall region, to keep structural integrity at the junction Would you prefer: 1. **Hex/honeycomb pattern** of small circular holes — even light, minimal shadow lines, structurally strong 2. **Square grid** of circular holes — simpler to model, still good light distribution 3. **Concentric rings of holes** — follows the circular geometry naturally And what hole diameter feels right to you? Something like 3-5mm with thin bridges between them would let a lot of light through while keeping the perforated look clean. ## User (2026-02-05 16:05:03) honeycomb, let's try 5mm ### Tool Call [completed]: EnterPlanMode **Tool:** other **Timestamp:** 2026-02-05 16:05:06 ``` Entered plan mode. You should now focus on exploring the codebase and designing an implementation approach. In plan mode, you should: 1. Thoroughly explore the codebase to understand existing patterns 2. Identify similar features and architectural approaches 3. Consider multiple approaches and their trade-offs 4. Use AskUserQuestion if you need to clarify the approach 5. Design a concrete implementation strategy 6. When ready, use ExitPlanMode to present your plan for approval Remember: DO NOT write or edit any files yet. This is a read-only exploration and planning phase. ``` ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 16:05:09 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out="/home/sam/test/next/config/config/test.stl" ring_wall_height=50 diffuser_thickness=0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) # --- Inner clip wall (on top of ring wall) --- top_face = diffuser.faces().sort_by(Axis.Z)[-1] with BuildSketch(top_face): Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=clip_depth) # --- Outer clip wall (on top of ring wall) --- with BuildSketch(top_face): Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 16:05:12) Now let me research how to create a honeycomb hole pattern in build123d. ### Tool Call [completed]: "build123d hex grid circular holes perforated plate example" **Tool:** fetch **Timestamp:** 2026-02-05 16:05:43 ``` Web search results for query: "build123d hex grid circular holes perforated plate example" Links: [{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"Designing a Part in build123d — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_design.html"},{"title":"hex grid generator 3D Models | Page 1 | STLFinder","url":"https://www.stlfinder.com/3dmodels/hex+grid+generator/"},{"title":"Perforated Plates Stainless Steel or Galvanized, Round Hole and Hexagonal Sheet","url":"https://www.perforated-metal.net/perforatedmetal/perforated-plate-for-tubes.html"},{"title":"2D & 3D hex grid creator + custom infills + surface finishes by Xavier Faraudo | Download free STL model | Printables.com","url":"https://www.printables.com/model/323850-2d-3d-hex-grid-creator-custom-infills-surface-fini"},{"title":"About — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/"},{"title":"Hexagon holes for cheaper 3D prints","url":"https://sev.dev/hardware/hexagon-holes/"},{"title":"Round Hole Perforated Sheet - Façade, Ceiling, Diffuser, Non-slip Floor","url":"https://www.perforated-metal.net/perforatedmetal/round-hole-perforated-sheet.html"},{"title":"openscad build plate layout grid 3D Models | Page 1 | STLFinder","url":"https://www.stlfinder.com/3dmodels/openscad-build-plate-layout-grid/"}] Here are the results for your search on **build123d hex grid circular holes perforated plate example**: ## build123d Perforated Plate / Hex Grid Example The most relevant result comes from the **official build123d documentation**, which includes a dedicated example for creating a perforated plate with a hex grid pattern. ### Perforated Plate Example (from build123d docs) The example demonstrates creating 625 holes in a planar part using `HexLocations` to calculate hole positions with a `major_r` of 10, then creating wires for both the perimeter (`Rectangle(500, 600)`) and the holes (`RegularPolygon`), combining them into a `Face`, and extruding it to a 3D part. Key highlights of the approach: 1. **`HexLocations`** is used to generate the hex grid pattern of hole positions. It calculates the locations of 625 holes with `HexLocations(major_r, 25, 25)`. 2. **Wire-based approach**: Rather than doing Boolean subtractions one-by-one, the example creates wires for both the perimeter and all the holes, then creates a new `Face` from the perimeter and hole wires, and finally extrudes it to a 3D part — this is an efficient approach to creating a large number of holes. 3. The example is available in both **Builder Mode** and **Algebra Mode** in the documentation, with identical logic. ### Related: Heat Exchanger Example The build123d docs also include a heat exchanger example that uses a similar hex grid concept but with circular holes. It uses `HexLocations` combined with `Circle` to place tubes in a hexagonal pattern, filtering locations to fit within a circular boundary using `if l.position.length < bundle_diameter / 2`. ### Additional Context - Build123d is a Python-based, parametric (BREP) modeling framework for 2D and 3D CAD, built on the Open Cascade geometric kernel, providing a clean, fully Pythonic interface for creating precise models suitable for 3D printing, CNC machining, laser cutting, and other manufacturing processes. - Additionally, `GridLocations` can be used to create a grid of points for placing shapes in rectangular patterns, while `HexLocations` provides the staggered hexagonal layout needed for perforated plates. ### Source Links - **Official examples page**: https://build123d.readthedocs.io/en/stable/examples_1.html - **Introductory examples**: https://build123d.readthedocs.io/en/latest/introductory_examples.html REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: "build123d HexLocations API documentation 2025" **Tool:** fetch **Timestamp:** 2026-02-05 16:05:43 ``` Web search results for query: "build123d HexLocations API documentation 2025" Links: [{"title":"Builder Common API Reference — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/builder_api_reference.html"},{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Assemblies — build123d 0.10.1.dev127+g428e11d68 documentation","url":"https://build123d.readthedocs.io/en/latest/assemblies.html"},{"title":"BuildSketch — build123d 0.9.2.dev71+g2431a05 documentation","url":"https://build123d.readthedocs.io/en/latest/build_sketch.html"},{"title":"Releases · gumyr/build123d","url":"https://github.com/gumyr/build123d/releases"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Cheat Sheet — build123d 0.9.2.dev321+g696e99c88 documentation","url":"https://build123d.readthedocs.io/en/latest/cheat_sheet.html"},{"title":"About — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/"},{"title":"Moving Objects — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/moving_objects.html"},{"title":"build123d","url":"https://pypi.org/project/build123d/"}] Here are the results for the **build123d `HexLocations` API documentation**: ## `HexLocations` — build123d API `HexLocations` is defined as: `class HexLocations(radius: float, x_count: int, y_count: int, major_radius: bool = False, align: Align | tuple[Align, Align] = (Align.CENTER, Align.CENTER))` ### Description It creates a context of hexagon array of locations for Part or Sketch.(no content)When creating hex locations for an array of circles, set `radius` to the radius of the circle plus one half the spacing between the circles. ### Parameters - **`radius`** (`float`) — The radius of the hexagons (apothem by default, or major radius if `major_radius=True`). - **`x_count`** (`int`) — Number of hexagons in the X direction. - **`y_count`** (`int`) — Number of hexagons in the Y direction. - **`major_radius`** (`bool`, optional) — If `True`, treat the radius as the major (circumscribed) radius. Defaults to `False`. - **`align`** (`Union[Align, tuple[Align, Align]]`, optional) — Defaults to `(Align.CENTER, Align.CENTER)`. ### Context `HexLocations` provides a hex grid of locations ideal for nesting circles. It is one of several location context managers alongside `GridLocations`, `Locations`, and `PolarLocations`.(no content)`HexLocations` is used to arrange objects in a hexagonal grid. ### Development History The `major_radius` bool parameter was added and the `apothem` parameter was renamed to `radius` by @jdegenstein in PR #643. ### Usage Examples 1. **Hexagonal hole grid (Builder mode):** The hexagonal hole pattern is generated using `HexLocations`, and each location is populated with a hexagonal wire. These wires are passed directly to the `Face` constructor as holes. 2. **Assembly with shallow copies:** You can use `HexLocations` to generate locations for assembly placement, e.g., `locs = HexLocations(6, 10, 10).local_locations`, then create copies of an imported object at each location. 3. **Heat exchanger example:** The positions of the tubes are defined with `HexLocations` and further limited to fit within the circular end caps. ### Reference Links - **Builder API Reference**: [build123d.readthedocs.io/en/stable/builder_api_reference.html](https://build123d.readthedocs.io/en/stable/builder_api_reference.html) - **Examples**: [build123d.readthedocs.io/en/stable/examples_1.html](https://build123d.readthedocs.io/en/stable/examples_1.html) - **GitHub**: [github.com/gumyr/build123d](https://github.com/gumyr/build123d) REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: "build123d HexLocations honeycomb pattern holes example" **Tool:** fetch **Timestamp:** 2026-02-05 16:05:49 ``` Web search results for query: "build123d HexLocations honeycomb pattern holes example" Links: [{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Assemblies — build123d 0.10.1.dev127+g428e11d68 documentation","url":"https://build123d.readthedocs.io/en/latest/assemblies.html"},{"title":"BuildSketch — build123d 0.9.2.dev71+g2431a05 documentation","url":"https://build123d.readthedocs.io/en/latest/build_sketch.html"},{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"How to make a honeycomb pattern - Need help? We are here. - Shapr3D Community","url":"https://discourse.shapr3d.com/t/how-to-make-a-honeycomb-pattern/17600"},{"title":"Builder Common API Reference — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/builder_api_reference.html"},{"title":"Tips, Best Practices and FAQ — build123d 0.10.1.dev134+gcca47ff3e documentation","url":"https://build123d.readthedocs.io/en/latest/tips.html"},{"title":"How can I get honeycomb as an exterior fill pattern too? - Simplify3D User Forum","url":"https://forum.simplify3d.com/viewtopic.php?t=10707"},{"title":"How do I print a honeycomb structure that I have designed us...","url":"https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/how-do-i-print-a-honeycomb-structure-that-i-have-designed-using-the-technique-that-infill-uses/"},{"title":"Moving Objects — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/moving_objects.html"}] Here are the results for your search on **build123d HexLocations honeycomb pattern holes example**: ## Overview `HexLocations` is a class in build123d that creates a context of hexagon array of locations for Part or Sketch. When creating hex locations for an array of circles, set the radius to the radius of the circle plus one half the spacing between the circles.(no content)In builder mode, `HexLocations` is used to arrange objects in a hexagonal grid. --- ## Key Example: Honeycomb Hole Pattern (from build123d docs) The example demonstrates an efficient approach to creating a large number of holes (625 in this case) in a planar part using build123d. Here is the code structure: ```python import timeit from build123d import * from ocp_vscode import show start_time = timeit.default_timer() # Calculate the locations of 625 holes major_r = 10 hole_locs = HexLocations(major_r, 25, 25) # Create wires for both the perimeter and all the holes face_perimeter = Rectangle(500, 600).wire() hex_hole = RegularPolygon(major_r - 1, 6, major_radius=True).wire() holes = hole_locs * hex_hole # Create a new Face from the perimeter and hole wires grid_pattern = Face(face_perimeter, holes) # Extrude to a 3D part grid = extrude(grid_pattern, 1) print(f"Time: {timeit.default_timer() - start_time:0.3f}s") show(grid) ``` ### How It Works 1. The hexagonal hole pattern is generated using `HexLocations`, and each location is populated with a hexagonal wire. 2. These wires are passed directly to the `Face` constructor as holes. 3. Instead of modeling and subtracting 3D solids for each hole—which is computationally expensive—this method constructs a 2D Face from an outer perimeter wire and a list of hole wires. 4. On a typical Linux laptop, this script completes in approximately 1.02 seconds, compared to substantially longer runtimes for boolean subtraction of individual holes in 3D. --- ## Using HexLocations in Builder Mode `HexLocations` provides a hex grid of locations ideal for nesting circles, alongside other location tools like `Locations` (arbitrary locations) and `PolarLocations` (locations defined by radius and angle). In builder mode, you can also use `HexLocations` as a context manager within `BuildSketch` or `BuildPart`: ```python with BuildPart() as part: Box(length, width, thickness) with BuildSketch(part.faces().sort_by(Axis.Z)[-1]) as sketch: with HexLocations(radius, x_count, y_count): Circle(hole_radius) extrude(amount=-thickness, mode=Mode.SUBTRACT) ``` --- ## HexLocations API Signature The class signature is: `HexLocations(radius: float, x_count: int, y_count: int, major_radius: bool = False, align=...)` **Parameters:** - `radius` – spacing radius (for circles: circle radius + half the gap between circles) - `x_count` – number of hexagons in the x direction - `y_count` – number of hexagons in the y direction - `major_radius` – whether the radius refers to the major radius - `align` – alignment options (defaults to center) --- ## Tips - When creating complex 3D objects, it is generally best to start with 2D work before moving on to 3D, because 3D structures are much more intricate and 3D operations can be slower and more prone to failure. The honeycomb example embodies this best practice by constructing the hole pattern in 2D first and then extruding. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: "build123d heat exchanger example HexLocations Circle filter circular boundary" **Tool:** fetch **Timestamp:** 2026-02-05 16:06:16 ``` Web search results for query: "build123d heat exchanger example HexLocations Circle filter circular boundary" Links: [{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Releases · gumyr/build123d","url":"https://github.com/gumyr/build123d/releases"},{"title":"About — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/"},{"title":"Examples and Tutorials | gumyr/build123d | DeepWiki","url":"https://deepwiki.com/gumyr/build123d/10-examples-and-tutorials"},{"title":"Cheat Sheet — build123d 0.9.2.dev321+g696e99c88 documentation","url":"https://build123d.readthedocs.io/en/latest/cheat_sheet.html"},{"title":"build123d/docs/cheat_sheet.rst at dev · gumyr/build123d","url":"https://github.com/gumyr/build123d/blob/dev/docs/cheat_sheet.rst"},{"title":"Heat Exchanger","url":"https://doc.freefem.org/tutorials/heatExchanger.html"},{"title":"Key Concepts — build123d 0.10.1.dev148+g4b5668a75 documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts.html"}] Here are the search results for the build123d heat exchanger example using `HexLocations`, `Circle`, and filtering for a circular boundary: ## build123d Heat Exchanger Example The heat exchanger example is one of the key examples in the build123d documentation that demonstrates how to use `HexLocations` with a circular boundary filter. ### How It Works The example defines a heat exchanger with parameters like `exchanger_diameter = 10 * CM`, `exchanger_length = 30 * CM`, `tube_diameter = 5 * MM`, `tube_spacing = 2 * MM`, and `tube_wall_thickness = 0.5 * MM`. The key technique is **filtering `HexLocations` to fit within a circular boundary**: The tube locations are generated using a list comprehension that iterates over `HexLocations` and filters them by checking if each location's position length is less than `bundle_diameter / 2`: ```python tube_locations = [ l for l in HexLocations( radius=(tube_diameter + tube_spacing) / 2, x_count=exchanger_diameter // tube_diameter, y_count=exchanger_diameter // tube_diameter, ) if l.position.length < bundle_diameter / 2 ] ``` This is the crucial filtering step — `HexLocations` generates a rectangular grid of hexagonally-packed locations, and `l.position.length < bundle_diameter / 2` filters them to only keep those within a circular boundary (since `position.length` gives the distance from the origin). ### Building the Tubes and Plate Each tube is created as a ring (`Circle(tube_diameter / 2) - Circle(tube_diameter / 2 - tube_wall_thickness)`), and the full tube plan is built by multiplying the filtered locations by the ring shape: `tube_plan = Sketch() + tube_locations * ring`. The tube plan is then extruded with `heat_exchanger = extrude(tube_plan, exchanger_length / 2)`.(no content)A plate is also created by subtracting tube holes from a solid circle: `plate = Circle(radius=exchanger_diameter / 2) - tube_locations * Circle(...)`, positioned on a `Plane` offset from the end. ### Context in build123d build123d is a Python-based, parametric boundary representation (BREP) modeling framework for 2D and 3D CAD, built on the Open Cascade geometric kernel.(no content)The heat exchanger example (found at `examples/heat_exchanger.py`) is referenced as a demonstration of positioning objects using location patterns. This pattern of generating `HexLocations` and filtering with a distance check (`l.position.length < radius`) is a common and elegant technique in build123d for creating hexagonally-packed patterns within circular boundaries — useful for heat exchangers, speaker grilles, perforated plates, and similar designs. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: "honeycomb perforated plate hole spacing bridge width structural integrity thin sheet 0.5mm" **Tool:** fetch **Timestamp:** 2026-02-05 16:06:19 ``` Web search results for query: "honeycomb perforated plate hole spacing bridge width structural integrity thin sheet 0.5mm" Links: [{"title":"Honeycomb Hexagonal Perforated Metal Sheet","url":"https://www.brilliantarchitectural.com/honeycomb-decorative-perforated-metal-sheets/"},{"title":"Hexagonal (Honeycomb) Perforated Metal Sheet - Dongfu Perforating","url":"https://perforatedsheetsmetal.com/hole-types/hexagonal-perforated-metal-sheet/"},{"title":"Honeycomb 22 Gauge Perforated Sheet - Alcobra Metals","url":"https://alcobrametals.com/product/honeycomb-22-gauge-perforated-sheet/"},{"title":"4.5mm Hexagonal Hole Perforated Steel Metal Sheet - 5mm Pitch - 1mm Thick - The Mesh Company","url":"https://themeshcompany.com/shop/perforated-metal/mild-steel-perforated-metal/4-5mm-hexagonal-hole-perforated-steel-metal-sheet-5mm-pitch-1mm-thick/"},{"title":"Honeycomb Perforated Mesh Honeycomb Perforated Steel Plate - Perforated Sheets and Perforated Metal Sheet","url":"https://bonitech.en.made-in-china.com/product/qwlASFXKkkpn/China-Honeycomb-Perforated-Mesh-Honeycomb-Perforated-Steel-Plate.html"},{"title":"Amazon.com: COYOUCO 304 Stainless Steel Perforated Sheet Hex Hole Metal Mesh Sheet Panel – Decorative Perforated Plate for Air Vent Grille Filter Guard Furniture DIY and Outdoor Use,Thick 1mm,25x35cm Dia 6mm : Industrial & Scientific","url":"https://www.amazon.com/COYOUCO-Stainless-Steel-Perforated-Sheet/dp/B0FBG4S1S8"},{"title":"Hexagonal - Perforated - Carbon Steel - 16642722 | McNICHOLS®","url":"https://www.mcnichols.com/perforated-metal/hexagonal-hole/carbon-steel-cs-16642722"},{"title":"High Quality Stainless-Steel Honeycomb Perforated Steel Plate Mesh - Perforated Metal Mesh and Perforated Panel","url":"https://wymetalmesh.en.made-in-china.com/product/lZgfSNIMZprP/China-High-Quality-Stainless-Steel-Honeycomb-Perforated-Steel-Plate-Mesh.html"},{"title":"Galvanized Perforated Steel Sheet - Honeycomb Hex Holes - 4 x 8 Ft.","url":"https://metalsdelivered.com/products/galvanized-perforated-steel-sheet-honeycomb-hex-holes-4-x-8-ft"},{"title":"Hexagonal Perforated Metal | Honeycomb Metal Mesh | Customizable","url":"https://antislipplate.com/perfsheet/hexagonal-perforated-metal/"}] Here are the search results for your query about honeycomb perforated plate hole spacing, bridge width, structural integrity, and thin sheet (0.5mm): ## Honeycomb Perforated Plate: Hole Spacing, Bridge Width & Structural Integrity ### Overview Honeycomb perforated sheet metal, also known as hexagonal perforated metal sheet, features a pattern of hexagonal holes resembling a honeycomb structure.(no content)This design offers an appealing balance of aesthetics and functionality, with high open area for enhanced airflow, light transmission, and acoustics.(no content)The honeycomb pattern is widely recognized for its strength and structural integrity, making the sheet durable yet lightweight. ### Hole Spacing & Customization The size and spacing of the hexagons can vary, depending on the specific application and desired aesthetic.(no content)Hole sizes and spacing can also be customized according to customer needs.(no content)Hexagonal perforated metal, also known as honeycomb perforated sheet metal, is a type of mesh product produced by continuously punching and cutting hexagonal holes on metal sheets using hexagonal molds on a CNC punching machine. ### Bridge Width (Bar Width) Examples McNICHOLS® offers a Honeycomb 2279 product in Carbon Steel, Cold Rolled, 22 Gauge (.0299" Thick), with 1/4" Hexagonal holes on 9/32" Staggered Centers and a 1/32" Bar Width, achieving 79% Open Area. This illustrates that very narrow bridge widths (bar widths) are achievable, though they must be carefully balanced with structural needs. ### Structural Integrity Considerations The hexagonal pattern not only provides structural integrity but also adds an appealing visual element, making it suitable for both functional and decorative uses.(no content)Featuring a precision-cut hexagon hole pattern, this metal sheet provides excellent airflow and filtration performance while maintaining structural integrity—perfect for ventilation covers, filters, and speaker grilles. ### Thin Sheet Capabilities Some manufacturers have ISO certifications and can achieve a minimum aperture SWD as small as 0.3mm. This suggests that very fine perforations are possible on thin sheets. Types of perforated sheets include pattern punching net, forming punch net, special thickness punch net, special thin punch net, micro-hole punch net, and line cutting perforation net. This indicates that special thin perforated sheets are a recognized product category. ### Materials Available Honeycomb perforated sheet metal is commonly made from stainless steel, aluminum, galvanized steel, copper, and brass.(no content)These materials provide options for corrosion resistance, strength, or decorative finishes, depending on the project's needs. ### Applications Honeycomb perforated sheet metal is widely used in chemical machinery, pharmaceutical equipment, food and beverage machinery, silencers, refrigeration equipment, speakers, filtration equipment, and more. It plays an important role in noise reduction and filtration due to its unique geometric shape. ### Key Specification Parameters When ordering, you typically need to provide material, thickness, hole type, hole diameter, spacing, surface treatment, width, length, and quantity. --- **Note:** The search results did not return specific engineering guidelines for minimum bridge width on 0.5mm thin sheets. For very thin sheets (0.5mm), the bridge width (the metal remaining between holes) is a critical factor in maintaining structural integrity. Generally, a minimum bridge width equal to or greater than the sheet thickness is recommended, but for precise engineering specifications, consulting a manufacturer or a structural engineering reference for perforated plates would be advisable. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: "perforated metal sheet minimum bridge width between holes design guidelines" **Tool:** fetch **Timestamp:** 2026-02-05 16:06:20 ``` Web search results for query: "perforated metal sheet minimum bridge width between holes design guidelines" Links: [{"title":"Understanding Specifications of Round Hole Perforated Sheets","url":"https://perfsheet.com/news/understanding-round-hole-perforated-metal-specifications/"},{"title":"Sheet Metal Design Guidelines | DFMPro","url":"https://dfmpro.com/manufacturing-processes/dfmpro-for-sheet-metal/"},{"title":"Sheet Metal Design Guidelines","url":"https://www.factorem.co/knowledge-hub/sheet-metal-design-guidelines"},{"title":"Sheet Metal Design Guidelines – Engineering Cheat Sheet","url":"https://engineeringcheatsheet.com/sheet-metal-design-guidelines/"},{"title":"Handbook for Perforated Metals","url":"https://www.marcospecialtysteel.com/content/uploads/2017/01/Perforated-Handbook-for-designers-min.pdf"},{"title":"Dillinger Fabrik gelochter Bleche GmbH - Basic Terms - Information","url":"https://www.df-perforatedsheets.com/en/engineering/basic-terms-information"},{"title":"Sheet Metal Fabrication | Design Guidelines","url":"https://www.protolabs.com/services/sheet-metal-fabrication/design-guidelines/"},{"title":"Perforated Metal sheet in a variety hole sizes and patterns.","url":"https://www.metals-inc.com/perforated-metal/"},{"title":"Minimum Hole Size - Design Details - Perforated | Brown-Campbell","url":"https://www.brown-campbell.com/products/info?page=perforated&cmsID=perforated-hole-size"},{"title":"Sheet Metal Design Guidelines: Designing Sheet Metal Parts | Komaspec","url":"https://www.komaspec.com/about-us/blog/sheet-metal-design-guidelines-designing-components/"}] Here are the key design guidelines for **minimum bridge width between holes in perforated metal sheets**: --- ## Bridge Width (Bar Width) Fundamentals The **bridge** (also called "bar" or "web") is the narrowest strip of metal remaining between two adjacent holes in a perforated sheet. It is critical for the structural integrity of the sheet. - Two terms describe the distance between holes: **Pitch** (center-to-center distance between adjacent holes) and **Bridge width** (the smallest unperforated space between two holes in adjacent rows). - Some buyers confuse pitch with the metal "bridge" between holes — the bridge is actually pitch minus hole diameter. This is critical for strength: if you need the sheet to support load, resist denting, or stay flatter after punching, the web dimension matters as much as hole size. --- ## Minimum Bridge-to-Thickness Ratio The most widely cited guideline for perforated metal is: - The ratio of bridge width (c) to plate thickness (s) should not be less than **1:1** (i.e., bridge ≥ thickness). Otherwise, the bridges between the holes may break. - For long (slotted) holes, approximately the same proportion of bridge (c) to material thickness (s) applies as for round holes — the ratio should be approximately 1:1. --- ## Minimum Hole Size Rule Closely related to bridge width is the minimum hole diameter rule: - The rule of thumb for perforating is that the hole diameter should not be less than the thickness of the material. The closer to a 1-to-1 ratio, the higher the probability of tool failure and the greater the precautions necessary to avoid it. - This rule applies specifically to carbon steel and aluminum. --- ## General Sheet Metal Hole Spacing Guidelines For standard (non-perforated pattern) sheet metal: - The distance between two holes should not be smaller than the thickness of the sheet, to ensure the holes are not deformed during the manufacturing process. - If extruded holes are too close, it can lead to metal deformation. The minimum distance between two extruded holes should be **six times** the thickness of the sheet metal. - If an extruded hole is too close to the part edge, it can lead to deformation or tearing. The minimum distance between extruded holes and the part edge should be at least **three times** the thickness of the sheet. --- ## Open Area and Structural Considerations - The relative open surface (or "open area") is the percentage of open surface (holes) relative to the total perforated area. It is important for screening, flow rate determination, load-bearing capacity calculations, and weight savings. - Perforated metal sheet retains a high percentage of its strength after perforation but loses a significant amount of weight. --- ## Summary Table | Guideline | Minimum Recommended Value | |---|---| | Bridge width : Material thickness | ≥ 1:1 | | Hole diameter : Material thickness | ≥ 1:1 | | Distance between punched holes (general) | ≥ 1× material thickness | | Distance between extruded holes | ≥ 6× material thickness | | Extruded hole to edge | ≥ 3× material thickness | The **key takeaway** for perforated metal design is that the bridge width should always be **at least equal to the material thickness** to prevent breakage and ensure structural integrity. For higher open areas or thinner bridges, consult with your perforator about tooling capabilities and material-specific limitations. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: Fetch https://build123d.readthedocs.io/en/stable/examples_1.html **Tool:** fetch **Timestamp:** 2026-02-05 16:06:31 ``` # Heat Exchanger and Fast Grid Holes Examples ## Heat Exchanger Example The heat exchanger demonstrates parametric tube positioning using `HexLocations` with circular boundary filtering: ```python tube_locations = [ l for l in HexLocations( radius=(tube_diameter + tube_spacing) / 2, x_count=exchanger_diameter // tube_diameter, y_count=exchanger_diameter // tube_diameter, ) if l.position.length < bundle_diameter / 2 ] ``` The code filters hexagonal grid positions to keep only those within the circular end cap boundary. Subsequently, tubes are created at these locations with both outer and inner circles to form hollow cylinders. ## Fast Grid Holes Example This approach efficiently creates 625 holes using 2D face geometry rather than subtracting individual 3D solids: ```python hole_locs = HexLocations(major_r, 25, 25) face_perimeter = Rectangle(500, 600).wire() hex_hole = RegularPolygon(major_r - 1, 6, major_radius=True).wire() holes = hole_locs * hex_hole grid_pattern = Face(face_perimeter, holes) grid = extrude(grid_pattern, 1) ``` The technique constructs "a new Face from the perimeter and hole wires" by passing hole wires directly to the Face constructor, dramatically reducing computation time compared to boolean subtraction operations. ``` ### Tool Call [completed]: "build123d algebra mode HexLocations Circle subtract holes from disk example code" **Tool:** fetch **Timestamp:** 2026-02-05 16:06:57 ``` Web search results for query: "build123d algebra mode HexLocations Circle subtract holes from disk example code" Links: [{"title":"Introductory Examples — build123d 0.10.1.dev182+g4a19f1591 documentation","url":"https://build123d.readthedocs.io/en/latest/introductory_examples.html"},{"title":"The build123d Examples — build123d 0.10.0 documentation","url":"https://build123d.readthedocs.io/en/stable/examples_1.html"},{"title":"Objects — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/objects.html"},{"title":"GitHub - gumyr/build123d: A python CAD programming library","url":"https://github.com/gumyr/build123d"},{"title":"Playing with Build123d - Juraph","url":"https://juraph.com/kiwi/playing_with_build123d/"},{"title":"Key Concepts (builder mode) — build123d 0.10.1.dev87+ga971cbbad documentation","url":"https://build123d.readthedocs.io/en/latest/key_concepts_builder.html"},{"title":"Releases · gumyr/build123d","url":"https://github.com/gumyr/build123d/releases"},{"title":"Assemblies — build123d 0.10.1.dev127+g428e11d68 documentation","url":"https://build123d.readthedocs.io/en/latest/assemblies.html"},{"title":"Selector Tutorial — build123d 0.10.1.dev176+g4d4622f91 documentation","url":"https://build123d.readthedocs.io/en/latest/tutorial_selectors.html"},{"title":"build123d","url":"https://partcad.org/repository/package/examples/script/build123d"}] Here are the relevant results from the search for **build123d algebra mode HexLocations Circle subtract holes from disk example code**: --- ## Key Approaches Found ### 1. Efficient HexLocations with Wire-Based Holes (Algebra Mode) The most efficient approach found uses `HexLocations` with `Face` construction from wires rather than boolean subtraction. The example creates 625 holes using `HexLocations` and `RegularPolygon` wires, then constructs a `Face` from the perimeter and hole wires before extruding. Specifically, the code is: ```python import timeit from build123d import * from ocp_vscode import show start_time = timeit.default_timer() major_r = 10 hole_locs = HexLocations(major_r, 25, 25) face_perimeter = Rectangle(500, 600).wire() hex_hole = RegularPolygon(major_r - 1, 6, major_radius=True).wire() holes = hole_locs * hex_hole grid_pattern = Face(face_perimeter, holes) grid = extrude(grid_pattern, 1) ``` Instead of modeling and subtracting 3D solids for each hole—which is computationally expensive—this method constructs a 2D Face from an outer perimeter wire and a list of hole wires.(no content)On a typical Linux laptop, this script completes in approximately 1.02 seconds, compared to substantially longer runtimes for boolean subtraction of individual holes in 3D. ### 2. Algebra Mode Subtraction Pattern (Circle Holes from a Disk) For a simpler subtraction pattern using Circles in algebra mode, the search results show examples like: You can use list comprehensions to place circles at locations and subtract them: ```python a, b, c = 80, 60, 10 sk6 = [loc * Circle(c) for loc in Locations((b, 0), (0, b), (-b, 0), (0, -b))] ex6 = extrude(Circle(a) - sk6, c) ``` The algebra operations are vectorized, which means `obj - [obj1, obj2, obj3]` is short for `obj - obj1 - obj2 - obj3` (and more efficient). ### 3. GridLocations Example (Algebra Mode) In algebra mode, `GridLocations` places Circles on points, and the circles are then extruded: ```python holes = Sketch() + [ plane * loc * Circle(thickness / 4) for loc in GridLocations(length / 4, width / 4, 2, 2) ] ex22 -= extrude(holes, -100, both=True) ``` ### 4. Using HexLocations in Builder Mode (for reference) A heat exchanger example uses `HexLocations` with filtering to place tubes within a circular boundary: ```python tube_locations = [ l for l in HexLocations( radius=(tube_diameter + tube_spacing) / 2, x_count=exchanger_diameter // tube_diameter, y_count=exchanger_diameter // tube_diameter, ) if l.position.length < bundle_diameter / 2 ] ``` --- ## How to Combine These for a Disk with HexLocations Circle Holes (Algebra Mode) Based on the patterns above, you could write algebra-mode code to subtract circular holes from a disk using `HexLocations` like this: ```python from build123d import * # Parameters disk_radius = 100 hole_radius = 5 hex_spacing = 15 # Create the disk sketch and subtract hex-located circle holes disk = Circle(disk_radius) holes = [loc * Circle(hole_radius) for loc in HexLocations(hex_spacing, 10, 10) if loc.position.length < disk_radius - hole_radius] disk -= holes # Extrude to 3D part = extrude(disk, 5) ``` Or, for better performance with many holes, use the **wire-based approach**: ```python from build123d import * disk_radius = 100 hole_radius = 5 hex_spacing = 15 perimeter = Circle(disk_radius).wire() hole_wire = Circle(hole_radius).wire() hole_locs = [loc for loc in HexLocations(hex_spacing, 15, 15) if loc.position.length < disk_radius - hole_radius] holes = [loc * hole_wire for loc in hole_locs] face = Face(perimeter, holes) part = extrude(face, 5) ``` The algebra mode interface follows a stateless paradigm where each object is explicitly tracked and mutated by algebraic operators.(no content)A Circle face is translated with `Pos`, a Location object for transforming Shapes, and subtracted from the sketch. This sketch face is then extruded into a Solid part. REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: Fetch https://build123d.readthedocs.io/en/stable/builder_api_reference.html **Tool:** fetch **Timestamp:** 2026-02-05 16:07:06 ``` # HexLocations Class Documentation ## Full API Signature ```python class HexLocations(_radius: float_, _x_count: int_, _y_count: int_, _major_radius: bool = False_, _align: Align | tuple[Align, Align] = (Align.CENTER, Align.CENTER)) ``` ## Parameters - **radius**: "distance from origin to vertices (major), or optionally from the origin to side (minor or apothem) with major_radius = False" - **x_count**: Number of points (must be > 0) - **y_count**: Number of points (must be > 0) - **major_radius**: Boolean flag determining radius interpretation (defaults to False) - **align**: Alignment setting for min, center, or max positioning (defaults to center alignment) ## Usage Note on Radius and Circle Spacing When implementing hexagonal arrays for circles, the documentation advises: "set radius to the radius of the circle plus one half the spacing between the circles." This guidance helps coordinate circular element positioning within the hexagonal grid pattern. ## Key Variables The class provides access to apothem (inscribed circle radius), diagonal (major radius), and local_locations for workplane-independent positioning. ``` ### Tool Call [completed]: "3D printing perforated plate minimum wall thickness bridge between holes PLA 0.5mm" **Tool:** fetch **Timestamp:** 2026-02-05 16:07:31 ``` Web search results for query: "3D printing perforated plate minimum wall thickness bridge between holes PLA 0.5mm" Links: [{"title":"Wall Thickness Guide: Minimum and Optimal Measurements for 3D Printing | Mandarin3D","url":"https://mandarin3d.com/blog/wall-thickness-guide-minimum-and-optimal-measurements"},{"title":"3D Printing Design Guideline","url":"https://jlc3dp.com/help/article/3D-Printing-Design-Guideline"},{"title":"3D Printing Guidelines | AvidPD","url":"https://avidpd.com/3d-printing-guidelines/"},{"title":"Design Rules & Best Practices for FFF 3D Printing | Hydra Research","url":"https://www.hydraresearch3d.com/design-rules"},{"title":"PrintLab 3D Printing Tips","url":"https://weareprintlab.com/blog/printlab-3d-printing-tips/"},{"title":"Wall Thickness in 3D Printing: Recommendations, Minimum and Maximum Values – Raise3D: Reliable, Industrial Grade 3D Printer","url":"https://www.raise3d.com/blog/3d-printing-wall-thickness/"},{"title":"Wall thickness 3D print: guidelines for strong, reliable parts - Sinterit – Professional SLS 3D Printers & Accessories","url":"https://sinterit.com/3d-printing-guide/design-for-3d-printing/wall-thickness-3d-print/"},{"title":"minimum thickness of walls, floor with PLA","url":"https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-general-discussion-announcements-and-releases/minimum-thickness-of-walls-floor-with-pla/"},{"title":"3D Printing Wall Thickness: The Ultimate Guide to Strength & Printability yigurp.com","url":"https://yigurp.com/3d-printing-wall-thickness/"},{"title":"What is the minimum wall thickness for PLA 3D printing? - Blog - FACFOX","url":"https://www.facfox3d.com/blog/what-is-the-minimum-wall-thickness-for-pla-3d-printing-1390988.html"}] Here are the search results regarding **3D printing perforated plates, minimum wall thickness, and bridges between holes in PLA at ~0.5mm**: --- ## Key Findings ### Minimum Wall Thickness for PLA (FDM) The golden rule is that your minimum wall thickness should be at least twice your nozzle diameter. For the standard 0.4mm nozzle, that's **0.8mm minimum**.(no content)Wall thickness should ideally be a **multiple of your nozzle diameter**. A 0.4mm nozzle works best with walls that are 0.8mm, 1.2mm, 1.6mm, 2.0mm, and so on. A 1.0mm wall with a 0.4mm nozzle creates internal voids where the slicer can't fit complete extrusion lines—weakening your part invisibly. ### Is 0.5mm Wall Thickness Feasible? A 0.5mm wall looks fine on screen but **won't print reliably**. Always verify wall thickness against printing minimums before exporting.(no content)You can print walls thinner than the minimum recommended thickness, but it's not recommended—parts will be fragile and likely fail. For example, a 0.6mm PLA wall may print but will snap if you apply even light pressure. ### Recommendations by Application - **Decorative / non-structural parts:** A minimum wall thickness of 0.8mm to 1.2mm is usually sufficient for decorative objects, allowing for delicate details while still maintaining integrity. - **Functional parts under stress:** A minimum wall thickness of 1.5mm to 2mm is recommended for functional objects that need to withstand some stress or load. - **Structural parts with significant loads:** For structural objects that need to support significant weight or forces, a minimum wall thickness of 2mm to 3mm or more may be required. ### Around Holes Specifically When designing holes, the material around the hole matters as much as the hole itself. Reinforce screw holes by adding at least one screw diameter of material around them. So for an M4 screw, you want at least 4mm of wall thickness surrounding the hole. ### Bridging Considerations Without special design considerations, holes through unsupported bridges will not print successfully. A technique can be used where you extrude two rectangles tangent to the hole — the first as thick as the layer height, the second twice the layer height — to enable printing such holes without supports. ### Practical Guidance for Thin Bridges Between Holes It is strongly recommended to model walls at least two extrusions wide, generally 0.9mm. Thinner walls can have issues printing successfully and will not be very strong. Perimeters are the greatest source of strength in a 3D printed part. ### Using a Smaller Nozzle For a 0.25mm nozzle, the wall thickness should be at least 0.25 or could be 0.5, 0.75, 1mm, etc. This means if you absolutely need 0.5mm walls between holes, switching to a **0.25mm nozzle** could make that feasible. --- ## Summary A **0.5mm bridge/wall between holes** in a PLA perforated plate is **below the recommended minimum** for a standard 0.4mm nozzle (which requires at least **0.8mm**). At 0.5mm, you'll likely encounter: - **Unreliable printing** — the slicer may not be able to properly fill the wall - **Extreme fragility** — even light pressure could cause cracking or snapping - **Poor bridging** — especially if the wall also needs to bridge over air **Possible solutions:** 1. **Increase wall thickness** to at least 0.8mm (ideally 1.2mm) between holes 2. **Use a smaller nozzle** (e.g., 0.25mm) to reliably print 0.5mm walls 3. **Resin (SLA) printing** — resin printers can handle thinner walls (0.5mm minimum) because resin cures into a hard, dense material. 4. **Print orientation** — orient the plate flat on the bed to avoid bridging issues between holes REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks. ``` ### Tool Call [completed]: Research build123d honeycomb pattern **Tool:** think **Timestamp:** 2026-02-05 16:08:10 **Description:** Research build123d honeycomb pattern ``` Here is a comprehensive summary of my research findings: --- ## build123d HexLocations for Honeycomb Hole Patterns ### The `HexLocations` Class `HexLocations` is build123d's built-in tool for creating hexagonal grid patterns. Its signature is: ```python HexLocations(radius: float, x_count: int, y_count: int, major_radius: bool = False, align=...) ``` **Critical detail about the `radius` parameter**: When creating hex locations for an array of circles, you must set `radius` to **the radius of the circle plus one half the spacing between circles**. So for 5mm diameter holes (2.5mm radius) with a 1mm bridge between holes, you would use `radius = 2.5 + 0.5 = 3.0`. ### Two Approaches: Boolean Subtraction vs. Wire-Based Face Construction **Approach 1: Algebra-mode boolean subtraction** (simpler, fine for moderate hole counts) ```python from build123d import * disk_radius = 47.2 hole_radius = 2.5 bridge_width = 1.0 # mm between holes hex_radius = hole_radius + bridge_width / 2 # = 3.0 disk = Circle(disk_radius) holes = [ loc * Circle(hole_radius) for loc in HexLocations(hex_radius, 30, 30) if loc.position.length + hole_radius < disk_radius ] perforated_disk = disk - holes part = extrude(perforated_disk, 0.5) ``` **Approach 2: Wire-based Face construction** (much faster for large hole counts -- recommended) ```python from build123d import * disk_radius = 47.2 hole_radius = 2.5 bridge_width = 1.0 hex_radius = hole_radius + bridge_width / 2 perimeter = Circle(disk_radius).wire() hole_wire = Circle(hole_radius).wire() hole_locs = [ loc for loc in HexLocations(hex_radius, 30, 30) if loc.position.length + hole_radius < disk_radius ] holes = [loc * hole_wire for loc in hole_locs] face = Face(perimeter, holes) part = extrude(face, 0.5) ``` The wire-based approach constructs a 2D `Face` from an outer perimeter wire and a list of hole wires, then extrudes once. The official build123d docs report this completes in ~1 second for 625 holes, whereas boolean subtraction of individual 3D cylinders takes much longer. ### Clipping to a Circular Boundary The technique from the **heat exchanger example** is to generate a large rectangular grid of `HexLocations` and then **filter by distance from center**: ```python hole_locs = [ loc for loc in HexLocations(hex_radius, x_count, y_count) if loc.position.length + hole_radius < disk_radius ] ``` `loc.position.length` gives the distance from the origin to each grid point. By checking that this distance **plus the hole radius** is less than the disk radius, you ensure no hole extends beyond the disk edge. You can adjust the margin (e.g., `< disk_radius - 1.0`) if you want a solid rim around the outer edge. ### Calculating x_count and y_count You need enough grid points to cover the disk. A safe estimate: ```python x_count = int(2 * disk_radius / (hex_radius * 2)) + 2 y_count = int(2 * disk_radius / (hex_radius * sqrt(3))) + 2 ``` For your case (disk_radius=47.2, hex_radius=3.0): x_count ~ 18, y_count ~ 20. Rounding up to 30x30 is safe since the filter removes points outside the disk. --- ## Bridge Width / Spacing Recommendations ### General Engineering Rule for Perforated Metal The standard guideline for perforated metal sheets is that the **bridge width should be at least equal to the material thickness** (1:1 ratio). For your 0.5mm thick disk, that means a minimum bridge of 0.5mm. However, this rule comes from industrial metal stamping. For your use case, more context matters: ### For 3D Printing (FDM/FFF with PLA) With a standard **0.4mm nozzle**: - **Minimum reliable wall/bridge: 0.8mm** (2x nozzle diameter) - **Recommended: 1.0-1.2mm** for structural reliability - A 0.5mm bridge between holes will **not print reliably** with a 0.4mm nozzle -- the slicer cannot fit complete extrusion lines - Wall thickness should ideally be a **multiple of nozzle diameter** (0.8mm, 1.2mm, 1.6mm) With a **0.25mm nozzle**: 0.5mm bridges become feasible. With **SLA/resin printing**: 0.5mm walls are printable and reasonably strong. ### Practical Recommendations for Your Design | Bridge Width | Hex Radius | Open Area | Notes | |---|---|---|---| | 0.5mm | 2.75mm | ~75% | Too thin for 0.4mm FDM nozzle | | 0.8mm | 2.9mm | ~68% | Minimum for 0.4mm FDM | | 1.0mm | 3.0mm | ~63% | Good balance for FDM | | 1.2mm | 3.1mm | ~58% | Recommended for structural parts | | 1.5mm | 3.25mm | ~52% | Strong, conservative choice | For a 0.5mm thick disk that needs to be structurally sound, I would suggest **1.0-1.5mm bridge width** if FDM printing, which translates to `hex_radius = 3.0 to 3.25`. ### Complete Recommended Code ```python from build123d import * # Parameters disk_radius = 47.2 disk_thickness = 0.5 hole_diameter = 5.0 hole_radius = hole_diameter / 2 # 2.5mm bridge_width = 1.2 # mm between holes (adjust as needed) hex_radius = hole_radius + bridge_width / 2 # spacing for HexLocations rim_width = 1.5 # solid rim at disk edge # Generate enough grid points to cover the disk count = int(2 * disk_radius / hex_radius) + 4 # Build using wire-based Face (fast method) perimeter = Circle(disk_radius).wire() hole_wire = Circle(hole_radius).wire() hole_locs = [ loc for loc in HexLocations(hex_radius, count, count) if loc.position.length + hole_radius < disk_radius - rim_width ] holes = [loc * hole_wire for loc in hole_locs] face = Face(perimeter, holes) part = extrude(face, disk_thickness) ``` --- ## Sources - [build123d Examples (Fast Grid Holes, Heat Exchanger)](https://build123d.readthedocs.io/en/stable/examples_1.html) - [build123d Builder Common API Reference (HexLocations)](https://build123d.readthedocs.io/en/stable/builder_api_reference.html) - [build123d Introductory Examples](https://build123d.readthedocs.io/en/latest/introductory_examples.html) - [build123d GitHub Repository](https://github.com/gumyr/build123d) - [Dillinger Perforated Sheets - Basic Terms (bridge width guidelines)](https://www.df-perforatedsheets.com/en/engineering/basic-terms-information) - [Brown-Campbell Minimum Hole Size Design Details](https://www.brown-campbell.com/products/info?page=perforated&cmsID=perforated-hole-size) - [Wall Thickness Guide for 3D Printing (Mandarin3D)](https://mandarin3d.com/blog/wall-thickness-guide-minimum-and-optimal-measurements) - [Raise3D Wall Thickness Recommendations](https://www.raise3d.com/blog/3d-printing-wall-thickness/) - [Sheet Metal Design Guidelines (DFMPro)](https://dfmpro.com/manufacturing-processes/dfmpro-for-sheet-metal/) agentId: aa6c4aa (for resuming to continue this agent's work if needed) ``` ## Agent (2026-02-05 16:08:13) Good, I have all the info I need. The approach is clear — use `HexLocations` to create a honeycomb pattern of 5mm holes in the disk, using the wire-based `Face` method for performance. The holes should stop before the ring wall junction to keep structural integrity. The key question is whether to integrate this into the existing `BuildPart` flow or build the disk separately. Since the disk is the first element and subsequent parts reference its top face, I need to be careful. The cleanest approach: replace the simple `Cylinder` disk with a perforated disk built via the wire/Face/extrude method, still within the `BuildPart` context. Let me write the plan. ### Tool Call [completed]: Write /home/sam/.claude/plans/lucky-meandering-cat.md **Tool:** edit **Timestamp:** 2026-02-05 16:08:30 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -0,0 +1,34 @@ +# Plan: Add honeycomb holes to diffuser disk + +## File to modify +`/home/sam/bin/test.py` + +## Approach + +Replace the solid `Cylinder` disk with a perforated disk using build123d's `HexLocations` to generate a honeycomb pattern of 5mm circular holes. + +## New parameters +- `hole_diameter = 5` — diameter of each hole +- `bridge_width = 1.2` — material between holes (safe for 0.4mm FDM nozzle) +- `rim_width = 1.5` — solid rim kept at the disk edge and around the ring wall base + +## Implementation + +1. Add the new parameters in the parameters section +2. Replace the disk `Cylinder` with a perforated disk built using the **BuildSketch approach**: + - In a `BuildSketch` on `Plane.XY`, create `Circle(diffuser_radius)` for the outer perimeter + - Use `HexLocations` to place `Circle(hole_diameter/2, mode=Mode.SUBTRACT)` across the disk + - Filter holes so they stay within `diffuser_radius - rim_width` (solid rim at edge) + - Also filter holes so they stay outside the ring wall zone — no holes under `inner_wall_outer_radius - wall_thickness - rim_width` to `outer_wall_inner_radius + wall_thickness + rim_width` ... actually simpler: just keep holes within `inner_wall_outer_radius - wall_thickness - rim_width` since the ring wall sits on top anyway and blocks them +3. `extrude(amount=diffuser_thickness)` to create the disk +4. Rest of the code (ring wall, clip walls) stays the same — they reference the top face which still exists + +## Hole placement detail + +- `hex_spacing = hole_diameter / 2 + bridge_width / 2` — the radius parameter for `HexLocations` +- `count = int(2 * diffuser_radius / hex_spacing) + 4` — enough grid points +- Filter: `loc.position.length + hole_diameter / 2 < diffuser_radius - rim_width` + +## Verification +- Run the script: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py` +- Check the STL visually for the honeycomb pattern on the disk with solid rim at edges ``` ### Tool Call [completed]: Ready to code? **Tool:** switch_mode **Timestamp:** 2026-02-05 16:20:46 ``` ``` ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 16:20:54 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=1 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out="/home/sam/test/next/config/config/test.stl" ring_wall_height=1 diffuser_thickness=0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip with BuildPart() as diffuser: # --- Diffuser disk (flat on build plate at Z=0) --- Cylinder( radius=diffuser_radius, height=diffuser_thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), ) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) # --- Inner clip wall (on top of ring wall) --- top_face = diffuser.faces().sort_by(Axis.Z)[-1] with BuildSketch(top_face): Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=clip_depth) # --- Outer clip wall (on top of ring wall) --- with BuildSketch(top_face): Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here ``` ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:21:05 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,6 +2,9 @@ cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder +hole_diameter = 5 # diameter of honeycomb holes in the diffuser disk +bridge_width = 1.2 # material between holes +rim_width = 1.5 # solid rim at disk edge # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk ``` ## Agent (2026-02-05 16:21:19) Now replace the solid disk with a perforated one. I'll use `HexLocations` within a `BuildSketch` to subtract holes from the disk, keeping a solid rim at the edge and under the ring wall area. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:21:25 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,13 +2,18 @@ outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip +hole_radius = hole_diameter / 2 +hex_spacing = hole_radius + bridge_width / 2 +hex_count = int(2 * diffuser_radius / hex_spacing) + 4 +max_hole_radius = diffuser_radius - rim_width # solid rim at outer edge + with BuildPart() as diffuser: - # --- Diffuser disk (flat on build plate at Z=0) --- - Cylinder( - radius=diffuser_radius, - height=diffuser_thickness, - align=(Align.CENTER, Align.CENTER, Align.MIN), - ) + # --- Diffuser disk with honeycomb holes (flat on build plate at Z=0) --- + with BuildSketch(): + Circle(diffuser_radius) + with HexLocations(hex_spacing, hex_count, hex_count): + Circle(hole_radius, mode=Mode.SUBTRACT) + extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): ``` ## Agent (2026-02-05 16:21:26) Wait — I need to filter the holes so they stay within the rim boundary. `HexLocations` as a context manager places shapes at every location, and I can't easily filter inside the `with` block. I should use the algebra mode approach or use a location filter. Let me reconsider. Actually, the simplest approach: let the `HexLocations` place holes everywhere, including outside the disk. Since the holes are subtracted from the disk `Circle`, holes outside the disk boundary have no effect — they subtract from nothing. The only issue is holes that straddle the edge, which would create partial cuts at the rim. To avoid that, I can use `Mode.INTERSECT` with a slightly smaller circle to clip them... or actually, I can just accept that holes near the edge get clipped by the disk boundary naturally. The ring wall on top will also cover holes in its footprint. But for a clean solid rim, I need to prevent holes near the edge. Let me use the algebra approach to filter locations. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:21:38 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,8 +2,10 @@ # --- Diffuser disk with honeycomb holes (flat on build plate at Z=0) --- with BuildSketch(): Circle(diffuser_radius) - with HexLocations(hex_spacing, hex_count, hex_count): - Circle(hole_radius, mode=Mode.SUBTRACT) + for loc in HexLocations(hex_spacing, hex_count, hex_count): + if loc.position.length + hole_radius < max_hole_radius: + with Locations((loc,)): + Circle(hole_radius, mode=Mode.SUBTRACT) extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 16:22:49 **Description:** Run the script to generate STL **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 16:22:58) Script runs successfully. The disk now has a honeycomb pattern of 5mm holes with: - **1.2mm bridges** between holes (printable on a 0.4mm FDM nozzle) - **1.5mm solid rim** at the disk edge (no partial holes at the boundary) - Holes are filtered by distance from center so none extend beyond the rim The ring wall, inner clip wall, and outer clip wall remain unchanged on top. The ring wall will naturally cover any holes underneath it. ## User (2026-02-05 16:25:43) Why circles ? I want honeycomb shaped holes ## Agent (2026-02-05 16:25:47) You're right — honeycomb means hexagonal holes, not circular ones. I'll replace the `Circle` subtraction with `RegularPolygon(radius, 6)` to get hexagonal holes. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:25:53 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,7 +2,7 @@ for loc in HexLocations(hex_spacing, hex_count, hex_count): if loc.position.length + hole_radius < max_hole_radius: with Locations((loc,)): - Circle(hole_radius, mode=Mode.SUBTRACT) + RegularPolygon(hole_radius, 6, mode=Mode.SUBTRACT) extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- ``` ### Tool Call [failed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 16:25:55 **Description:** Run the script to generate STL **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` Exit code 1 Traceback (most recent call last): File "/home/sam/bin/test.py", line 36, in with BuildPart() as diffuser: ^^^^^^^^^ NameError: name 'BuildPart' is not defined ``` ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 16:25:58 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 50 diffuser_thickness = 0.5 # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder hole_diameter = 5 # diameter of honeycomb holes in the diffuser disk bridge_width = 1.2 # material between holes rim_width = 1.5 # solid rim at disk edge # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip hole_radius = hole_diameter / 2 hex_spacing = hole_radius + bridge_width / 2 hex_count = int(2 * diffuser_radius / hex_spacing) + 4 max_hole_radius = diffuser_radius - rim_width # solid rim at outer edge with BuildPart() as diffuser: # --- Diffuser disk with honeycomb holes (flat on build plate at Z=0) --- with BuildSketch(): Circle(diffuser_radius) for loc in HexLocations(hex_spacing, hex_count, hex_count): if loc.position.length + hole_radius < max_hole_radius: with Locations((loc,)): RegularPolygon(hole_radius, 6, mode=Mode.SUBTRACT) extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) # --- Inner clip wall (on top of ring wall) --- top_face = diffuser.faces().sort_by(Axis.Z)[-1] with BuildSketch(top_face): Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=clip_depth) # --- Outer clip wall (on top of ring wall) --- with BuildSketch(top_face): Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 16:26:00) The `from build123d import *` line was removed. It must have been dropped during a previous tangling from org-mode. Let me add it back. ### Tool Call [failed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:26:03 ``` Editing file failed: The provided `old_string` does not appear in the file: "out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 50 diffuser_thickness = 0.5 # --- Parameters ---". No edits were applied. ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -1,6 +1,7 @@ out = "/home/sam/test/next/config/config/test.stl" ring_wall_height = 50 diffuser_thickness = 0.5 +from build123d import * # --- Parameters --- \ No newline at end of file ``` ### Tool Call [completed]: grep "from build123d" /home/sam/bin/test.py **Tool:** search **Timestamp:** 2026-02-05 16:26:05 ``` 6:from build123d import * ``` ## Agent (2026-02-05 16:26:07) The import is there at line 6. The file must have been re-tangled from org-mode between my read and the error. Let me re-read and try again. ### Tool Call [completed]: Read /home/sam/bin/test.py **Tool:** read **Timestamp:** 2026-02-05 16:26:09 ``` #!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3 # [[file:../perso/perso/roam/light_diffuser_for_the_lamp_of_my_kid.org::+BEGIN_SRC python :cache yes :python /home/sam/.local/pipx/venvs/clk/bin/python :results raw :exports results :ipfa t :var out="/home/sam/test/next/config/config/test.stl" :noweb yes :var ring_wall_height=50 :var diffuser_thickness=0.5 :tangle ~/bin/test.py :shebang "#!/usr/bin/env /home/sam/.local/pipx/venvs/clk/bin/python3"][No heading:3]] out="/home/sam/test/next/config/config/test.stl" ring_wall_height=50 diffuser_thickness=0.5 from build123d import * # --- Parameters --- cylinder_diameter = 80 # 8cm cylinder diameter cylinder_radius = cylinder_diameter / 2 edge_thickness = 2 # 2mm edge thickness of the cylinder clip_depth = 10 # depth the clip slides onto the cylinder hole_diameter = 5 # diameter of honeycomb holes in the diffuser disk bridge_width = 1.2 # material between holes rim_width = 1.5 # solid rim at disk edge # ring_wall_height = 2 # height of the cylindrical base wall # diffuser_thickness = 0.5 # thickness of the diffuser disk # Derived dimensions # The 8cm diameter is the circle formed by the gap between walls. # The gap (= edge_thickness) is centered on cylinder_radius. # Inner wall outer surface at R - edge_thickness/2, with tolerance on the inside. # Outer wall inner surface at R + edge_thickness/2, with tolerance on the outside. inner_wall_outer_radius = cylinder_radius - edge_thickness / 2 outer_wall_inner_radius = cylinder_radius + edge_thickness / 2 wall_thickness = 1.2 # thickness of each clip wall diffuser_radius = ( outer_wall_inner_radius + wall_thickness + 5 ) # disk extends beyond clip hole_radius = hole_diameter / 2 hex_spacing = hole_radius + bridge_width / 2 hex_count = int(2 * diffuser_radius / hex_spacing) + 4 max_hole_radius = diffuser_radius - rim_width # solid rim at outer edge with BuildPart() as diffuser: # --- Diffuser disk with honeycomb holes (flat on build plate at Z=0) --- with BuildSketch(): Circle(diffuser_radius) for loc in HexLocations(hex_spacing, hex_count, hex_count): if loc.position.length + hole_radius < max_hole_radius: with Locations((loc,)): Circle(hole_radius, mode=Mode.SUBTRACT) extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- with BuildSketch(diffuser.faces().sort_by(Axis.Z)[-1]): Circle(outer_wall_inner_radius + wall_thickness) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=ring_wall_height) # --- Inner clip wall (on top of ring wall) --- top_face = diffuser.faces().sort_by(Axis.Z)[-1] with BuildSketch(top_face): Circle(inner_wall_outer_radius) Circle(inner_wall_outer_radius - wall_thickness, mode=Mode.SUBTRACT) extrude(amount=clip_depth) # --- Outer clip wall (on top of ring wall) --- with BuildSketch(top_face): Circle(outer_wall_inner_radius + wall_thickness) Circle(outer_wall_inner_radius, mode=Mode.SUBTRACT) extrude(amount=clip_depth) export_stl(diffuser.part, out) # No heading:3 ends here ``` ## Agent (2026-02-05 16:26:11) I see — the file was re-tangled from org-mode and my `RegularPolygon` change was reverted back to `Circle`. The file still has circles. Let me apply the fix again and run it. ### Tool Call [completed]: Edit `/home/sam/bin/test.py` **Tool:** edit **Timestamp:** 2026-02-05 16:26:14 ``` ╭─────────╮ │ changes │ ╰─────────╯ @@ -2,7 +2,7 @@ for loc in HexLocations(hex_spacing, hex_count, hex_count): if loc.position.length + hole_radius < max_hole_radius: with Locations((loc,)): - Circle(hole_radius, mode=Mode.SUBTRACT) + RegularPolygon(hole_radius, 6, mode=Mode.SUBTRACT) extrude(amount=diffuser_thickness) # --- Cylindrical ring wall (on top of disk) --- ``` ### Tool Call [completed]: `/home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1` **Tool:** execute **Timestamp:** 2026-02-05 16:27:11 **Description:** Run the script to generate STL **Command:** /home/sam/.local/pipx/venvs/clk/bin/python /home/sam/bin/test.py 2>&1 ``` ``` ## Agent (2026-02-05 16:27:13) Done. The holes are now hexagonal (`RegularPolygon` with 6 sides) instead of circular, giving the proper honeycomb look.