Add Lulzbot Mini camera bracket

Electronics and Digital Fabrication/lulzbot-mini-camera/camera-bracket.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+
+import cadquery as cq
+from cadquery import exporters
+
+
+camera_width = 43.4 + 0.5
+camera_height = 6
+
+cutout_width = 18 - 0.5
+cutout_length = 21.5 - 0.5
+cutout_straight_length = 16 - 0.5
+
+bracket_width = cutout_length
+bracket_thickness = 3
+
+bolt_hole_diameter = 3.4
+bolt_hole_spacing = 10
+bolt_offset_y = 9.35  # derived from bolt spacing from edge
+bolt_tab_width = bolt_hole_diameter * 3
+
+
+corner_radius = 1
+
+
+result = (
+    cq
+    .Workplane("front")
+    .box(camera_width + bracket_thickness * 2, bracket_width, camera_height + bracket_thickness)
+    .faces(">Y")
+      .workplane()
+      .move(yDist=-bracket_thickness / 2)
+      .rect(camera_width, camera_height, True)
+      .cutThruAll()
+    .faces("<Z[1]")
+      .edges("<Y")
+      .workplane(centerOption="CenterOfMass")
+      .transformed(rotate=(0, 0, 180))
+      .center(-cutout_width/2, 0)
+      .lineTo(0, cutout_straight_length)
+      .threePointArc((cutout_width / 2, cutout_length), (cutout_width, cutout_straight_length))
+      .lineTo(cutout_width, 0)
+      .close()
+      .extrude(camera_height)
+    .faces(">X")
+      .vertices("<Y and <Z")
+      .workplane(centerOption="CenterOfMass")
+      .rect(bracket_width, bracket_thickness, centered=False)
+      .extrude(bolt_tab_width)
+    .faces("<Z[1]")
+      .edges("<X and <Y")
+      .workplane(centerOption="CenterOfMass")
+      .center(bolt_tab_width / 2, -bolt_offset_y)
+      .rarray(1, bolt_hole_spacing, 1, 2)
+      .hole(bolt_hole_diameter)
+    .edges("|Z or >Z").fillet(corner_radius)
+    .faces(">Z[1]").edges(">X or <X or >Y").fillet(corner_radius)
+)
+
+exporters.export(result, 'camera-bracket.stl')