69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
import cadquery as cq
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import math
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from shapely.geometry import LineString
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from shapely.geometry import Point
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slant_degree=15.0
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thickness=20
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rod_thickness=15.2
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loop_thickness=1.5
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stepper_motor_size=42
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offset=9
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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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base = cq.Workplane('XY').lineTo(0,offset).polarLine(stepper_motor_size, 90-slant_degree)
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end_x=gap+stepper_motor_size-5
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end_y=-4.5
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angle=40
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outer_ring_diameter=rod_thickness+2*loop_thickness
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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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l = LineString([(n_x, n_y), (n_x+100*math.cos(math.radians(-slant_degree)), n_y+100*math.sin(math.radians(-slant_degree)))])
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i = c.intersection(l)
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if len(i.geoms) > 1 and i.geoms[0].coords[0][0] > i.geoms[1].coords[0][0]:
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x = i.geoms[1].coords[0][0]
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y = i.geoms[1].coords[0][1]
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else:
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x = i.geoms[0].coords[0][0]
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y = i.geoms[0].coords[0][1]
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return x, y
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base = base.hLine(width).polarLine(stepper_motor_size-5,270-slant_degree).tangentArcPoint((end_x, end_y), relative=False)
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d=20
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t=7
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outer_x=center_x+math.cos(math.radians(270-slant_degree))*outer_ring_diameter/2
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outer_y=center_y+math.sin(math.radians(270-slant_degree))*outer_ring_diameter/2
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base = base.threePointArc((center_x+outer_ring_diameter/2 ,center_y), (outer_x, outer_y)).polarLine(d, 180-slant_degree).vLine(t)
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n_x=base.val().endPoint().toTuple()[0]
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n_y=base.val().endPoint().toTuple()[1]
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coor_x, coor_y = findRodInter(n_x, n_y)
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last_x, last_y = findRodInter(n_x, n_y+2)
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base = base.lineTo(coor_x, coor_y)
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base = base.threePointArc((center_x+rod_thickness/2, center_y), (last_x, last_y))
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base = base.polarLine(d, 180-slant_degree)
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base = base.close().extrude(20)
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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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base = base.faces('+Z').shell(-1.6)
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# Render
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show_object(base, name='Follow Focus Base')
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