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involute rack: fix alpha_t

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looooo
2020-02-04 12:38:18 +01:00
parent 397c10fdf2
commit d84ead5cb7
1 changed files with 8 additions and 6 deletions
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14
pygears/involute_tooth.py
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@@ -180,17 +180,19 @@ class InvoluteRack(object):
if self.properties_from_tool:
pressure_angle_t = arctan(tan(self.pressure_angle) / cos(self.beta))
m = self.m / cos(self.beta)
m_n = self.m
else:
pressure_angle_t = self.pressure_angle
m = self.m
m_n = self.m
a = (2 + self.head + self.clearence) * m * tan(pressure_angle_t)
b = (m * pi) / 4 - (1 + self.head) * m * tan(pressure_angle_t)
a = (2 + self.head + self.clearence) * m_n * tan(pressure_angle_t)
b = (m * pi) / 4 - (1 + self.head) * m_n * tan(pressure_angle_t)
tooth = [
[-self.m * (1 + self.clearence), -a - b],
[self.m * (1 + self.head), -b],
[self.m * (1 + self.head), b],
[-self.m * (1 + self.clearence), a + b]
[-m_n * (1 + self.clearence), -a - b],
[m_n * (1 + self.head), -b],
[m_n * (1 + self.head), b],
[-m_n * (1 + self.clearence), a + b]
]
teeth = [tooth]
trans = translation([0., m * pi, 0.])