extensions/add_mesh_BoltFactory
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Fix for #6: Incorrect bolt lengths #13

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sw-tya wants to merge 2 commits from sw-tya/add_mesh_BoltFactory:swtya_BoltLength into main
pull from: sw-tya/add_mesh_BoltFactory:swtya_BoltLength
merge into: extensions:main

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Conversation 4 Commits 2 Files Changed 1 +11 -5
1 changed files with 11 additions and 5 deletions
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16
source/createMesh.py
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@ -1600,9 +1600,10 @@ def Create_Thread_Verts(INNER_DIA, OUTTER_DIA, PITCH, HEIGHT,
Deg_Step = 360.0 / float(DIV_COUNT)
Height_Step = float(PITCH) / float(DIV_COUNT)
NUM_OF_START_THREADS = 4.0
NUM_OF_START_THREADS = 2.0 # Was 4 in the very first submission
NUM_OF_END_THREADS = 3.0
Num = int((HEIGHT - ((NUM_OF_START_THREADS * PITCH) + (NUM_OF_END_THREADS * PITCH))) / PITCH)
# This uses less than the requested bolt length by up to 1 pitch, after 5 revolutions
Row = 0
Crest_Height = float(PITCH) * float(CREST_PERCENT) / float(100)
@ -1774,15 +1775,20 @@ def Create_External_Thread(SHANK_DIA, SHANK_LENGTH, INNER_DIA, OUTTER_DIA,
)
Total_Row += Thread_End_Row
# Make a final correction for the bolt length to mitigate rounding errors during manufacture
Mini_adder = Lowest_Z_Vert + SHANK_LENGTH + LENGTH
if Mini_adder < LENGTH * 0.01:
Mini_adder = 0 # Catches a very thin shim and also negative situations, worst case error is 1%
verts.extend(Shank_Verts)
verts.extend(Thread_Start_Verts)
verts.extend(Thread_Verts)
verts.extend(Thread_End_Verts)
verts.extend(Move_Verts_Up_Z(Thread_Start_Verts, -Mini_adder)) # Needs moving down by the mini_adder
verts.extend(Move_Verts_Up_Z(Thread_Verts, -Mini_adder)) # so that any missing length is added
verts.extend(Move_Verts_Up_Z(Thread_End_Verts, -Mini_adder)) # between the thread and the shank.
faces.extend(Build_Face_List_Quads(Face_Start, DIV_COUNT, Total_Row - 1, 0))
faces.extend(Fill_Ring_Face(len(verts) - DIV_COUNT, DIV_COUNT, 1))
return verts, faces, 0.0 - Lowest_Z_Vert
return verts, faces, 0.0 - Lowest_Z_Vert + Mini_adder
# ####################################################################