feat(cad): build the drive_shaft_bar_adapter part in 3d instead of 2d sides with PolarLocations

cad/build.py

@@ -1,34 +1,35 @@
 # pyright: reportUnusedCallResult=false, reportWildcardImportFromLibrary=false
 from build123d import *
 
-bearing_offset = 20
-bearing_diameter = 22
-bearing_through_hole_diameter = 15
-bearing_height = 7
-shaft_clearance_diameter = 25
+def build_drive_shaft_mount():
+    bearing_offset = 20
+    bearing_diameter = 22
+    bearing_through_hole_diameter = 15
+    bearing_height = 7
+    shaft_clearance_diameter = 25
 
-core_width = 40
-thickness = 20
+    core_width = 40
+    thickness = 20
 
-screw_blocks_width = thickness
-screw_blocks_height = bearing_offset
-screw_blocks_radius = 3
+    screw_blocks_width = thickness
+    screw_blocks_height = bearing_offset
+    screw_blocks_radius = 3
 
-screw_head_diameter = 8.5
-screw_head_depth = 5
-screw_body_diameter = 5
+    screw_head_diameter = 8.5
+    screw_head_depth = 5
+    screw_body_diameter = 5
 
-track_width = 6.2
-track_height = 1.8
+    track_width = 6.2
+    track_height = 1.8
 
-assert (bearing_offset - bearing_diameter / 2) > 0
-assert (core_width - bearing_diameter) > 0
-assert (screw_blocks_width - (screw_blocks_radius * 2)) >= 0
-assert (bearing_offset - screw_blocks_height) >= 0
+    assert (bearing_offset - bearing_diameter / 2) > 0
+    assert (core_width - bearing_diameter) > 0
+    assert (screw_blocks_width - (screw_blocks_radius * 2)) >= 0
+    assert (bearing_offset - screw_blocks_height) >= 0
 
 
-with BuildPart() as builder:
-    with BuildSketch() as sketch:
+    with BuildPart() as drive_shaft_mount:
+        with BuildSketch():
             with BuildLine() as profile:
                 l1 = Line(
                     (0,0),
@@ -73,14 +74,65 @@ with BuildPart() as builder:
         extrude(amount=thickness / 2)
         mirror(about=Plane.XY)
 
-    with Locations((0, bearing_offset, builder.faces().sort_by(Axis.Z)[-1].center().Z)):
+        with Locations((0, bearing_offset, drive_shaft_mount.faces().sort_by(Axis.Z)[-1].center().Z)):
             Hole(bearing_diameter / 2, (thickness / 2) + (bearing_height / 2))
             Hole(shaft_clearance_diameter / 2, (thickness / 2) - (bearing_height / 2))
 
         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(drive_shaft_mount.faces().filter_by(Plane.XZ).sort_by(Axis.Y)[-2:]):
             CounterBoreHole(screw_body_diameter / 2, screw_head_diameter / 2, screw_head_depth)
 
-assert builder.part is not None
-export_step(builder.part, "drive shaft mount.step")
+    return drive_shaft_mount
+
+def build_drive_shaft_bar_adapter():
+    ext_size = 20
+
+    height = 60
+    thickness = 10
+
+    ext_screw_hole_diam = 6
+    ext_screw_hole_offset = 10
+
+    shaft_hub_bore_diam = 8
+    shaft_hub_center_diam = 14
+    shaft_hub_center_depth = 2
+    # if you where to draw a square around the center of the shaft hub this var is the length of the sides and each corner is the center of a screw hole
+    shaft_hub_screw_spacing = 16
+    shaft_hub_screw_diam = 4
+    # the depth of the screw holes into the shaft hub
+    shaft_hub_screw_depth = 8
+    shaft_hub_screw_head_depth = 4
+    shaft_hub_screw_head_diam = 7
+
+    with BuildPart() as drive_shaft_bar_adapter:
+        Box(ext_size + (thickness * 2), ext_size + (thickness * 2), height, align=(Align.CENTER, Align.CENTER, Align.MIN))
+
+        # hollow the box
+        with Locations((0, 0, thickness)):
+            Box(ext_size, ext_size, height - thickness, align=(Align.CENTER, Align.CENTER, Align.MIN), mode=Mode.SUBTRACT)
+
+        # extrusion screw holes
+        with Locations((0, 0, height - ext_screw_hole_offset)):
+            with PolarLocations(4, 4):
+                with Locations(Rotation(0, 90, 0)):
+                    Hole(ext_screw_hole_diam / 2)
+
+        # shaft interface
+        with Locations(drive_shaft_bar_adapter.faces().filter_by(Plane.XY).sort_by(Axis.Z)[1].offset(shaft_hub_screw_head_depth)):
+            l = shaft_hub_screw_spacing / 2
+            with Locations((-l, -l), (-l, l), (l, -l), (l, l)):
+                CounterBoreHole(shaft_hub_screw_diam / 2, shaft_hub_screw_head_diam / 2, shaft_hub_screw_head_depth, thickness + shaft_hub_screw_depth)
+        with Locations(drive_shaft_bar_adapter.faces().sort_by(Axis.Z)[0].center()):
+            Hole(shaft_hub_bore_diam / 2)
+            Hole(shaft_hub_center_diam / 2, shaft_hub_center_depth)
+
+    return drive_shaft_bar_adapter
+
+drive_shaft_mount = build_drive_shaft_mount()
+assert drive_shaft_mount.part is not None
+export_step(drive_shaft_mount.part, "drive shaft mount.step")
+
+drive_shaft_bar_adapter = build_drive_shaft_bar_adapter()
+assert drive_shaft_bar_adapter.part is not None
+export_step(drive_shaft_bar_adapter.part, "drive shaft bar adapter.step")