Improved formatting
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175578ddd0
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8a24e313e5
109
follow_focus.py
109
follow_focus.py
@ -23,35 +23,36 @@ stepper_hole_width=31.0
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# Case
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part_thinkness=20
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outer_fillets=2.5
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slant_degree=15.0
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rod_thickness=15.2
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loop_thickness=1.6
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angle=40
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wall_width=1.6
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lid_thicknesss = 5
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loop_width=wall_width
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rod_thickness=15.2
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angle=40
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offset=9
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# Gears
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mod=0.8
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gear_gap=0.2
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gear_offset=0.5
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large_gear_diameter=8.5
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gear_thinkness=10
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gap = stepper_motor_size * math.sin(math.radians(slant_degree)) / math.sin(math.radians(90-slant_degree))
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width = math.sqrt(gap**2 + stepper_motor_size**2 - 2*gap*stepper_motor_size*math.cos(math.radians(90)))
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# Other
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d=25
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t=7
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mount_gap=2
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# Calculated values
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lid_thicknesss = (part_thinkness-gear_thinkness)/2
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gap = stepper_motor_size * math.sin(math.radians(slant_degree)) / math.sin(math.radians(90-slant_degree))
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width = math.sqrt(gap**2 + stepper_motor_size**2 - 2*gap*stepper_motor_size*math.cos(math.radians(90)))
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end_x=gap+stepper_motor_size-5
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end_y=-4.3
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outer_ring_diameter=rod_thickness+2*loop_thickness
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outer_ring_diameter=rod_thickness+2*loop_width
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center_x=end_x-math.cos(math.radians(angle))*outer_ring_diameter/2
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center_y=end_y-math.sin(math.radians(angle))*outer_ring_diameter/2
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def findRodInter(n_x, n_y):
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p = Point(center_x, center_y)
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c = p.buffer(rod_thickness/2).boundary
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@ -84,7 +85,6 @@ def createOutline(ex_amount):
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base = base.polarLine(d, 180-slant_degree).close().extrude(ex_amount)
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# Fillets
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outer_fillets=2.5
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base = base.edges('|Z and >Y').fillet(outer_fillets)
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base = base.edges('|Z and <X').fillet(outer_fillets)
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base = base.edges('|Z').edges('<<Y[-2]').fillet(5)
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@ -94,29 +94,61 @@ lid = createOutline(-lid_thicknesss).translate((0,0,part_thinkness))
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base = createOutline(part_thinkness)
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# Shell
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copy = base.faces('>>Z[0]').workplane().center(0, -offset-loop_thickness).polarLine(stepper_motor_size, slant_degree).polarLine(-2*stepper_motor_size, 90+slant_degree).hLine(-2*stepper_motor_size).close().cutThruAll()
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copy = copy.faces('+Z').workplane().center(0, -offset-loop_thickness).polarLine(2*stepper_motor_size,-slant_degree).vLine(stepper_motor_size).hLine(-2*stepper_motor_size).close().cutBlind(-lid_thicknesss)
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copy = base.faces('>>Z[0]').workplane().center(0, -offset-loop_width)\
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.polarLine(stepper_motor_size, slant_degree)\
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.polarLine(-2*stepper_motor_size, 90+slant_degree)\
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.hLine(-2*stepper_motor_size).close().cutThruAll()
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copy = copy.faces('+Z').workplane().center(0, -offset-loop_width)\
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.polarLine(2*stepper_motor_size,-slant_degree)\
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.vLine(stepper_motor_size)\
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.hLine(-2*stepper_motor_size)\
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.close().cutBlind(-lid_thicknesss)
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base = base.faces('+Z').shell(-wall_width)
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base = base.add(copy)
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base = base.faces('<<Z[0]').workplane().center(0, offset+loop_thickness).polarLine(stepper_motor_size, -slant_degree).polarLine(stepper_motor_size, -slant_degree-3.75).vLine(2*stepper_motor_size).hLine(-2*stepper_motor_size).close().cutBlind(-lid_thicknesss)
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base = base.faces('<<Z[0]').workplane().center(0, offset+loop_width)\
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.polarLine(stepper_motor_size, -slant_degree)\
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.polarLine(stepper_motor_size, -slant_degree-3.75)\
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.vLine(2*stepper_motor_size)\
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.hLine(-2*stepper_motor_size)\
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.close().cutBlind(-lid_thicknesss)
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# Stepper motor mount points
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stepper_hole_radius=stepper_hole_width/2*math.sqrt(2)
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stepper_center = cq.Workplane('XY').center(0, -offset-loop_thickness).lineTo(0, offset).polarLine(stepper_motor_size/2, 90-slant_degree).polarLine(stepper_motor_size/2, -slant_degree).val().endPoint().toTuple()
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base = base.faces('>>Z[0]').workplane().center(stepper_center[0], -stepper_center[1]).circle(22.5/2).pushPoints([(stepper_hole_radius*math.cos(math.radians(45+slant_degree)),stepper_hole_radius*math.sin(math.radians(45+slant_degree))), (stepper_hole_radius*math.cos(math.radians(135+slant_degree)),stepper_hole_radius*math.sin(math.radians(135+slant_degree))),(stepper_hole_radius*math.cos(math.radians(225+slant_degree)),stepper_hole_radius*math.sin(math.radians(225+slant_degree))),(stepper_hole_radius*math.cos(math.radians(315+slant_degree)),stepper_hole_radius*math.sin(math.radians(315+slant_degree)))]).circle(3/2).cutBlind(-wall_width)
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stepper_center = cq.Workplane('XY').center(0, -offset-loop_width)\
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.lineTo(0, offset)\
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.polarLine(stepper_motor_size/2, 90-slant_degree)\
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.polarLine(stepper_motor_size/2, -slant_degree)\
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.val().endPoint().toTuple()
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base = base.faces('>>Z[0]').workplane().center(stepper_center[0], -stepper_center[1])\
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.circle(22.5/2)\
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.pushPoints([(stepper_hole_radius*math.cos(math.radians(45+slant_degree)),\
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stepper_hole_radius*math.sin(math.radians(45+slant_degree))),\
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(stepper_hole_radius*math.cos(math.radians(135+slant_degree)),\
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stepper_hole_radius*math.sin(math.radians(135+slant_degree))),\
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(stepper_hole_radius*math.cos(math.radians(225+slant_degree)),\
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stepper_hole_radius*math.sin(math.radians(225+slant_degree))),\
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(stepper_hole_radius*math.cos(math.radians(315+slant_degree)),\
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stepper_hole_radius*math.sin(math.radians(315+slant_degree)))])\
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.circle(3/2).cutBlind(-wall_width)
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lid = lid.cut(base)
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copy = lid.faces('>>Z[0]').workplane().center(0, -offset-loop_thickness).polarLine(stepper_motor_size*2, slant_degree).polarLine(-2*stepper_motor_size, 90+slant_degree).hLine(-3*stepper_motor_size).close().cutThruAll()
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copy = lid.faces('>>Z[0]').workplane().center(0, -offset-loop_width)\
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.polarLine(stepper_motor_size*2, slant_degree)\
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.polarLine(-2*stepper_motor_size, 90+slant_degree)\
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.hLine(-3*stepper_motor_size).close().cutThruAll()
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lid = lid.faces('>Z[0]').shell(.000001-wall_width)
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lid = lid.add(copy)
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lid = lid.faces('>Z[1]').workplane().center(stepper_center[0], -stepper_center[1]-offset-loop_thickness).circle(5).extrude(lid_thicknesss-wall_width)
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lid = lid.faces('>Z[1]').workplane().center(stepper_center[0], -stepper_center[1]-offset-loop_width)\
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.circle(5).extrude(lid_thicknesss-wall_width)
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lid = lid.faces('>Z[0]').workplane().circle(5/2).cutThruAll()
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base = base.faces('<Z[1]').workplane().center(21,20.15).circle(26.5).cutBlind(-gear_thinkness-gear_gap)
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t=11/2
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base = base.faces('<Z[2]').workplane().hLine(t, forConstruction=True).threePointArc((-t,-t/2),(0,t)).polarLine(t, -slant_degree).close().extrude(-lid_thicknesss+wall_width)
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gear_offset=0.5
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base = base.faces('<Z[2]').workplane().hLine(t, forConstruction=True)\
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.threePointArc((-t,-t/2),(0,t))\
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.polarLine(t, -slant_degree)\
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.close().extrude(-lid_thicknesss+wall_width)
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base = base.faces('<Z[2]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
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base = base.faces('<Z[2]').workplane().circle(m3_tap/2).cutBlind(-part_thinkness/2+wall_width)
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@ -127,38 +159,50 @@ base = base.faces('<<Y[-1]').workplane().circle(8.5/2).cutBlind(-t-mount_gap)
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# Fastener
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base = base.faces('<<Y[-1]').workplane().circle((fastener_width+1)/2).cutBlind(-4)
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fastener = base.faces('<<Y[-4]').workplane().circle(fastener_width/2).extrude(4.5+fastener_height, combine=False)
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fastener = fastener.faces('<<Y[-1]').workplane().center(-fastener_length,0).line(20,-fastener_width/2).vLine(fastener_width).close().extrude(-fastener_height)
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fastener = fastener.faces('<<Y[-1]').workplane().center(-fastener_length,0)\
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.line(20,-fastener_width/2)\
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.vLine(fastener_width)\
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.close().extrude(-fastener_height)
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fastener = fastener.faces('<<Y[-1]').workplane().circle(fastener_width/6).extrude(-fastener_height)
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fastener = fastener.faces('<<Y[-1]').center(fastener_length,0).sketch().regularPolygon(8.5/2,6,tag='outer').finalize().cutBlind(-4)
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fastener = fastener.faces('<<Y[-1]').center(fastener_length,0)\
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.sketch().regularPolygon(8.5/2,6,tag='outer')\
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.finalize().cutBlind(-4)
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fastener = fastener.faces('<<Y[-6]').workplane().circle(5/2).cutThruAll()
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lid = lid.faces('>Z[0]').workplane().center(21,-20.15).hLine(t, forConstruction=True).threePointArc((-t,t/2),(0,-t)).polarLine(t, slant_degree).close().extrude(-lid_thicknesss+wall_width)
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lid = lid.faces('>Z[0]').workplane().center(21,-20.15)\
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.hLine(t, forConstruction=True)\
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.threePointArc((-t,t/2),(0,-t))\
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.polarLine(t, slant_degree)\
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.close().extrude(-lid_thicknesss+wall_width)
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lid = lid.faces('>Z[0]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
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lid = lid.faces('>Z[0]').workplane().circle(2).cutThruAll()
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lid = lid.faces('<Z[0]').workplane().circle(m3_head_diameter/2).cutBlind(-m3_head_depth)
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# Lid Holes
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lid = lid.faces('<Z[0]').workplane().center(-stepper_motor_size+wall_width,-stepper_motor_size+offset/2-loop_thickness).circle(m3_passthrough/2).cutThruAll()
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drill = lid.faces('<Z[0]').workplane().circle(m3_tap/2).extrude(-part_thinkness+wall_width, combine=False)
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lid = lid.faces('<Z[0]').workplane().center(-stepper_motor_size+wall_width,-stepper_motor_size+offset/2-loop_width)\
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.circle(m3_passthrough/2).cutThruAll()
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drill = lid.faces('<Z[0]').workplane().circle(m3_tap/2)\
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.extrude(-part_thinkness+wall_width, combine=False)
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base = base.cut(drill)
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lid = lid.faces('<Z[0]').workplane().circle(m3_head_diameter/2).cutBlind(-m3_head_depth)
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# Gears
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mod=0.8
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l_gear = cq.Workplane('XY').gear(SpurGear(module=mod,
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teeth_number=63,
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width=gear_thinkness,
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bore_d=large_gear_diameter))
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l_gear = l_gear.translate((21+stepper_center[0],20.15+stepper_center[1]+offset+loop_thickness,(gear_thinkness+gear_offset)/2))
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l_gear = l_gear.translate((21+stepper_center[0],20.15+stepper_center[1]+offset+loop_width,(gear_thinkness+gear_offset)/2))
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s_gear = cq.Workplane('XY').gear(SpurGear(module=mod,
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teeth_number=11,
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width=gear_thinkness))
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tab_distance = 2
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shaft_diameter = 5
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copy = s_gear.faces('<Z[0]').workplane().vLine(tab_distance, forConstruction=True).hLine(10).vLine(-10).hLine(-20).vLine(10).close().cutThruAll()
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copy = s_gear.faces('<Z[0]').workplane().vLine(tab_distance, forConstruction=True)\
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.hLine(10).vLine(-10).hLine(-20).vLine(10)\
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.close().cutThruAll()
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s_gear = s_gear.faces('<Z[0]').sketch().circle(shaft_diameter/2).finalize().cutThruAll()
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s_gear = s_gear.add(copy)
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s_gear = s_gear.translate((stepper_center[0],stepper_center[1]+offset+loop_thickness,(gear_thinkness+gear_offset)/2))
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s_gear = s_gear.translate((stepper_center[0],stepper_center[1]+offset+loop_width,(gear_thinkness+gear_offset)/2))
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# Render
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show_object(base, name='Follow Focus Base')
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@ -166,3 +210,4 @@ show_object(lid, name='Follow Focus Lid')
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show_object(fastener, name='Follow Focus Fastener')
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show_object(l_gear, name='Follow Focus Large Gear')
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show_object(s_gear, name='Follow Focus Small Gear')
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