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Changed passes for constant tool engagement

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This commit is contained in:
Markus Lampert
2022-02-22 19:52:00 -08:00
committed by mlampert
parent 00d2341748
commit a1117040b3
2 changed files with 23 additions and 7 deletions
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22
src/Mod/Path/PathScripts/PathThreadMilling.py
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@@ -74,11 +74,27 @@ def threadRadii(internal, majorDia, minorDia, toolDia, toolCrest):
def threadPasses(count, radii, internal, majorDia, minorDia, toolDia, toolCrest):
PathLog.track(count, radii, internal, majorDia, minorDia, toolDia, toolCrest)
# the logic goes as follows, total area to be removed:
# A = H * W ... where H is the depth and W is half the width of a thread
# H = k * sin(30) = k * 1/2 -> k = 2 * H
# W = k * cos(30) = k * sqrt(3)/2
# -> W = (2 * H) * sqrt(3) / 2 = H * sqrt(3)
# A = sqrt(3) * H^2
# Each pass has to remove the same area
# An = A / count = sqrt(3) * H^2 / count
# Because each successive pass doesn't have to remove the aera of the previous
# passes the result for the height:
# Ai = (i + 1) * An = (i + 1) * sqrt(3) * Hi^2 = sqrt(3) * H^2 / count
# Hi = sqrt(H^2 * (i + 1) / count)
# Hi = H * sqrt((i + 1) / count)
minor, major = radii(internal, majorDia, minorDia, toolDia, toolCrest)
dr = float(major - minor) / count
H = float(major - minor)
Hi = [H * math.sqrt((i + 1) / count) for i in range(count)]
PathLog.debug("threadPasses({}, {}) -> H={} : {}".format(minor, major, H, Hi))
if internal:
return [minor + dr * (i + 1) for i in range(count)]
return [major - dr * (i + 1) for i in range(count)]
return [minor + h for h in Hi]
return [major - h for h in Hi]
def elevatorRadius(obj, center, internal, tool):

8
src/Mod/Path/PathTests/TestPathThreadMilling.py
View File

@@ -57,8 +57,8 @@ class TestPathThreadMilling(PathTestBase):
def test10(self):
'''Verify internal thread passes.'''
self.assertList(PathThreadMilling.threadPasses(1, radii, True, 10, 9, 0, 0), [10])
self.assertList(PathThreadMilling.threadPasses(2, radii, True, 10, 9, 0, 0), [9.5, 10])
self.assertList(PathThreadMilling.threadPasses(5, radii, True, 10, 9, 0, 0), [9.2, 9.4, 9.6, 9.8, 10])
self.assertList(PathThreadMilling.threadPasses(2, radii, True, 10, 9, 0, 0), [9.707107, 10])
self.assertList(PathThreadMilling.threadPasses(5, radii, True, 10, 9, 0, 0), [9.447214, 9.632456, 9.774597, 9.894427, 10])
def test20(self):
'''Verify external radii.'''
@@ -72,8 +72,8 @@ class TestPathThreadMilling(PathTestBase):
def test30(self):
'''Verify external thread passes.'''
self.assertList(PathThreadMilling.threadPasses(1, radii, False, 10, 9, 0, 0), [9])
self.assertList(PathThreadMilling.threadPasses(2, radii, False, 10, 9, 0, 0), [9.5, 9])
self.assertList(PathThreadMilling.threadPasses(5, radii, False, 10, 9, 0, 0), [9.8, 9.6, 9.4, 9.2, 9])
self.assertList(PathThreadMilling.threadPasses(2, radii, False, 10, 9, 0, 0), [9.292893, 9])
self.assertList(PathThreadMilling.threadPasses(5, radii, False, 10, 9, 0, 0), [9.552786, 9.367544, 9.225403, 9.105573, 9])
def test40(self):
'''Verify thread commands for a single thread'''