Changed arc system

follow_focus.py

@@ -1,13 +1,25 @@
 import cadquery as cq
 
+import math
+
 slant_degree=15.0
 thickness=20
+rod_thickness=15.2
+loop_thickness=1.5
 stepper_motor_size=42
 offset=8.83
 
-base = cq.Workplane('XY').lineTo(0,offset).polarLine(42 ,90-slant_degree).hLine(43.4816).polarLine(45,270-slant_degree).polarLine(10,-(90-2*slant_degree))
-base = base.threePointArc((50,-20), (25, -30)).polarLine(10, 180-slant_degree).vLine(10).polarLine(12.5, -slant_degree)
-base = base.threePointArc((35, -20), (25, 0)).polarLine(10, 180-slant_degree).close().extrude(20)
+gap = stepper_motor_size * math.sin(math.radians(slant_degree)) / math.sin(math.radians(90-slant_degree))
+width = math.sqrt(gap**2 + stepper_motor_size**2 - 2*gap*stepper_motor_size*math.cos(math.radians(90)))
+base = cq.Workplane('XY').lineTo(0,offset).polarLine(stepper_motor_size, 90-slant_degree)
+base = base.hLine(width).polarLine(stepper_motor_size-5,270-slant_degree).tangentArcPoint((gap+stepper_motor_size-5,0), relative=False)
+
+#base = base.threePointArc((60,(-rod_thickness-2*loop_thickness)/2), (40, -rod_thickness-2*loop_thickness)).polarLine(10, 180-slant_degree).vLine(10).polarLine(12.5, -slant_degree)
+base = base.threePointArc((55,-20), (25, -30)).polarLine(15, 180-slant_degree).vLine(8).polarLine(15.5, -slant_degree)
+base = base.threePointArc((45, -10), (25, -20)).polarLine(15, 180-slant_degree)
+base = base.close().extrude(20)
 
 # Render
 show_object(base)
+
+