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feat(cad): modify the bearing hole to actually hold the bearing

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reed
2026-06-25 00:09:48 -05:00
parent e8aae131fa
commit 0c9cb6af36
1 changed files with 17 additions and 12 deletions
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cad/build.py
+17 -12
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@@ -1,14 +1,16 @@
# pyright: reportUnusedCallResult=false, reportWildcardImportFromLibrary=false # pyright: reportUnusedCallResult=false, reportWildcardImportFromLibrary=false
from build123d import * from build123d import *
hole_offset = 20 bearing_offset = 20
hole_diameter = 22 bearing_diameter = 22
bearing_through_hole_diameter = 15
bearing_height = 8
core_width = 40 core_width = 40
thickness = 20 thickness = 20
screw_blocks_width = thickness screw_blocks_width = thickness
screw_blocks_height = hole_offset screw_blocks_height = bearing_offset
screw_blocks_radius = 3 screw_blocks_radius = 3
screw_head_diameter = 8.5 screw_head_diameter = 8.5
@@ -18,10 +20,10 @@ screw_body_diameter = 5
track_width = 6.2 track_width = 6.2
track_height = 1.8 track_height = 1.8
assert (hole_offset - hole_diameter / 2) > 0 assert (bearing_offset - bearing_diameter / 2) > 0
assert (core_width - hole_diameter) > 0 assert (core_width - bearing_diameter) > 0
assert (screw_blocks_width - (screw_blocks_radius * 2)) >= 0 assert (screw_blocks_width - (screw_blocks_radius * 2)) >= 0
assert (hole_offset - screw_blocks_height) >= 0 assert (bearing_offset - screw_blocks_height) >= 0
with BuildPart() as builder: with BuildPart() as builder:
@@ -37,7 +39,7 @@ with BuildPart() as builder:
((l1 @ 1).X, screw_blocks_height), ((l1 @ 1).X, screw_blocks_height),
(core_width / 2, screw_blocks_height), (core_width / 2, screw_blocks_height),
) )
match (float)(hole_offset - screw_blocks_height): match (float)(bearing_offset - screw_blocks_height):
case 0: case 0:
FilletPolyline( FilletPolyline(
*polyline_path, *polyline_path,
@@ -50,26 +52,29 @@ with BuildPart() as builder:
) )
Line( Line(
sbl @ 1, sbl @ 1,
((sbl @ 1).X, hole_offset) ((sbl @ 1).X, bearing_offset)
) )
case len if len >= screw_blocks_radius: case len if len >= screw_blocks_radius:
FilletPolyline( FilletPolyline(
*polyline_path, *polyline_path,
(core_width / 2, hole_offset), (core_width / 2, bearing_offset),
radius=screw_blocks_radius radius=screw_blocks_radius
) )
case _: assert False case _: assert False
CenterArc((0, hole_offset), core_width / 2, 90, -90) CenterArc((0, bearing_offset), core_width / 2, 90, -90)
mirror(profile.line, Plane.YZ) mirror(profile.line, Plane.YZ)
make_face() make_face()
with Locations((0, hole_offset)): with Locations((0, bearing_offset)):
Circle(hole_diameter / 2, mode=Mode.SUBTRACT) Circle(bearing_through_hole_diameter / 2, mode=Mode.SUBTRACT)
extrude(amount=thickness / 2) extrude(amount=thickness / 2)
mirror(about=Plane.XY) mirror(about=Plane.XY)
with Locations((0, bearing_offset, builder.faces().sort_by(Axis.Z)[-1].center().Z)):
Hole(bearing_diameter / 2, bearing_height)
Box(core_width + (screw_blocks_width * 2), track_width, track_height, (90, 0, 0), (Align.CENTER, Align.CENTER, Align.MIN)) Box(core_width + (screw_blocks_width * 2), track_width, track_height, (90, 0, 0), (Align.CENTER, Align.CENTER, Align.MIN))
with Locations(builder.faces().filter_by(Plane.XZ).sort_by(Axis.Y)[-2:]): with Locations(builder.faces().filter_by(Plane.XZ).sort_by(Axis.Y)[-2:]):