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add proprty for rack endings

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This commit is contained in:
looooo
2020-02-10 11:06:59 +01:00
parent 3eea5eb8ca
commit 13e7b19cf0
2 changed files with 17 additions and 7 deletions
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5
freecad/gears/features.py
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@@ -208,6 +208,8 @@ class InvoluteGearRack(object):
gear parameters are internally recomputed for the rotated gear")
obj.addProperty("App::PropertyLength", "transverse_pitch",
"computed", "pitch in the transverse plane", 1)
obj.addProperty("App::PropertyBool", "add_endings", "gear_parameter", "if enabled the total length of the rack is teeth x pitch, \
otherwise the rack starts with a tooth-flank")
obj.addProperty("App::PropertyPythonObject", "rack", "test", "test")
obj.rack = self.involute_rack
obj.teeth = 15
@@ -219,6 +221,7 @@ class InvoluteGearRack(object):
obj.clearence = 0.25
obj.head = 0.
obj.properties_from_tool = True
obj.add_endings = True
self.obj = obj
obj.Proxy = self
@@ -234,6 +237,8 @@ class InvoluteGearRack(object):
fp.rack.clearence = fp.clearence
if "properties_from_tool" in fp.PropertiesList:
fp.rack.properties_from_tool = fp.properties_from_tool
if "add_endings" in fp.PropertiesList:
fp.rack.add_endings = fp.add_endings
fp.rack._update()
pts = fp.rack.points()
pol = Wire(makePolygon(list(map(fcvec, pts))))

19
pygears/involute_tooth.py
View File

@@ -161,7 +161,8 @@ class InvoluteTooth():
class InvoluteRack(object):
def __init__(self, m=5, z=15, pressure_angle=20 * pi / 180., thickness=5, beta=0, head=0, clearence = 0.25, properties_from_tool=False):
def __init__(self, m=5, z=15, pressure_angle=20 * pi / 180., thickness=5, beta=0, head=0, clearence=0.25,
properties_from_tool=False, add_endings=False):
self.pressure_angle = pressure_angle
self.thickness = thickness
self.m = m
@@ -170,11 +171,12 @@ class InvoluteRack(object):
self.head = head
self.clearence = clearence
self.properties_from_tool = properties_from_tool
self.add_endings = add_endings
def _update(self):
self.__init__(m=self.m, z=self.z, pressure_angle=self.pressure_angle,
thickness=self.thickness, beta=self.beta, head=self.head, clearence=self.clearence,
properties_from_tool=self.properties_from_tool)
properties_from_tool=self.properties_from_tool, add_endings=self.add_endings)
def points(self, num=10):
m, m_n, pitch, pressure_angle_t = self.compute_properties()
@@ -191,16 +193,19 @@ class InvoluteRack(object):
trans = translation([0., pitch, 0.])
for i in range(self.z - 1):
teeth.append(trans(teeth[-1]))
teeth = list(np.vstack(teeth))
ext1 = np.array(teeth[0]) + np.array([0., a + b - pitch / 2])
ext2 = np.array(teeth[-1]) - np.array([0., a + b - pitch / 2])
teeth = [ext1.tolist(), ext1.tolist()] + teeth + [ext2.tolist(), ext2.tolist()]
teeth = np.vstack(teeth)
if self.add_endings:
ext1 = teeth[0] + np.array([0., a + b - pitch / 2])
ext2 = teeth[-1] - np.array([0., a + b - pitch / 2])
teeth = [ext1.tolist(), ext1.tolist()] + teeth.tolist() + [ext2.tolist(), ext2.tolist()]
else:
teeth = [teeth[0].tolist()] + teeth.tolist() + [teeth[-1].tolist()]
#teeth.append(list(teeth[-1]))
teeth[0][0] -= self.thickness
#teeth.append(list(teeth[0]))
teeth[-1][0] -= self.thickness
teeth.append(teeth[0])
return(teeth)
return np.array(teeth)
def compute_properties(self):
if self.properties_from_tool: