From ad09e4c3a046d4900560ab6edea01352f563dd85 Mon Sep 17 00:00:00 2001
From: Christian Colglazier <christian@cacolglazier.com>
Date: Sat, 21 May 2022 18:20:33 -0400
Subject: [PATCH] M3 dimensions

---
 follow_focus.py | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/follow_focus.py b/follow_focus.py
index 5255784..0d8a061 100644
--- a/follow_focus.py
+++ b/follow_focus.py
@@ -1,7 +1,7 @@
 import cadquery as cq
 from cq_gears import SpurGear
 
-import copy, math
+import math
 
 from shapely.geometry import LineString
 from shapely.geometry import Point
@@ -17,6 +17,12 @@ offset=9
 part_thinkness=20
 gear_thinkness=10
 large_gear_diameter=8.5
+m3_tap=2.5
+m3_head_diameter=6
+m3_head_depth=3
+m3_passthrough=3.5
+#m_hole_diameter=6
+#m_hole_depth=3
 
 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)))
@@ -96,18 +102,16 @@ lid = lid.faces('>Z[1]').workplane().center(stepper_center[0], -stepper_center[1
 lid = lid.faces('>Z[0]').workplane().circle(5/2).cutThruAll()
 
 gear_gap=0.2
-base = base.faces('<Z[1]').workplane().center(21,20.15).circle(26.5).cutBlind(-gear_thinkness-gear_gap).tag('test')
+base = base.faces('<Z[1]').workplane().center(21,20.15).circle(26.5).cutBlind(-gear_thinkness-gear_gap)
 t=11/2
 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)
 gear_offset=0.5
 base = base.faces('<Z[2]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
-base = base.faces('<Z[2]').workplane().circle(2).cutBlind(-part_thinkness/2+wall_width)
-
-
+base = base.faces('<Z[2]').workplane().circle(m3_tap/2).cutBlind(-part_thinkness/2+wall_width)
 
 # Threaded insert
 base = base.faces('<<Y[-1]').workplane().center(-5,0).circle(6.5/2).cutBlind(-t-mount_gap*2-6)
-base = base.faces('<<Y[-1]').workplane().circle(8.5/2).cutBlind(-t-mount_gap).tag('test')
+base = base.faces('<<Y[-1]').workplane().circle(8.5/2).cutBlind(-t-mount_gap)
 
 # Fastener
 fastener_width = 11
@@ -123,15 +127,13 @@ fastener = fastener.faces('<<Y[-6]').workplane().circle(5/2).cutThruAll()
 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)
 lid = lid.faces('>Z[0]').workplane().circle(large_gear_diameter/2-gear_offset).extrude(gear_thinkness/2)
 lid = lid.faces('>Z[0]').workplane().circle(2).cutThruAll()
-m_hole_diameter=6
-m_hole_depth=3
-lid = lid.faces('<Z[0]').workplane().circle(m_hole_diameter/2).cutBlind(-m_hole_depth)
+lid = lid.faces('<Z[0]').workplane().circle(m3_head_diameter/2).cutBlind(-m3_head_depth)
 
-# Mount Hole
-lid = lid.faces('<Z[0]').workplane().center(-stepper_motor_size+wall_width,-stepper_motor_size+offset/2-loop_thickness).circle(3.5/2).cutThruAll()
-drill = lid.faces('<Z[0]').workplane().circle(2.5/2).extrude(-part_thinkness+wall_width, combine=False)
+# Lid Holes
+lid = lid.faces('<Z[0]').workplane().center(-stepper_motor_size+wall_width,-stepper_motor_size+offset/2-loop_thickness).circle(m3_passthrough/2).cutThruAll()
+drill = lid.faces('<Z[0]').workplane().circle(m3_tap/2).extrude(-part_thinkness+wall_width, combine=False)
 base = base.cut(drill)
-lid = lid.faces('<Z[0]').workplane().circle(m_hole_diameter/2).cutBlind(-m_hole_depth)
+lid = lid.faces('<Z[0]').workplane().circle(m3_head_diameter/2).cutBlind(-m3_head_depth)
 
 # Gears
 mod=0.8