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connector: add support for internal involute gears

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looooo
2021-12-16 13:20:11 +01:00
parent 2ecc0e8744
commit 590994984f
1 changed files with 34 additions and 8 deletions
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42
freecad/gears/connector.py
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@@ -21,7 +21,7 @@ import copy
import numpy as np
import FreeCAD
from pygears import __version__
from .features import InvoluteGear, CycloidGear, InvoluteGearRack, CycloidGearRack
from .features import InvoluteGear, CycloidGear, InvoluteGearRack, CycloidGearRack, InternalInvoluteGear
from pygears.computation import compute_shifted_gears
class ViewProviderGearConnector(object):
@@ -50,7 +50,7 @@ class GearConnector(object):
obj.addProperty("App::PropertyLink","master_gear","gear","master gear", 1)
obj.addProperty("App::PropertyLink","slave_gear","gear","slave gear", 1)
obj.addProperty("App::PropertyAngle", "angle1", "gear", "angle at which second gear is placed", 0)
obj.addProperty("App::PropertyAngle", "angle2", "gear", "angle at which second gear is placed", 0)
obj.addProperty("App::PropertyAngle", "angle2", "gear", "angle at which second gear is placed", 1)
obj.version = __version__
obj.master_gear = master_gear
obj.slave_gear = slave_gear
@@ -59,9 +59,9 @@ class GearConnector(object):
obj.Proxy = self
def onChanged(self, fp, prop):
# fp.angle2 = fp.master_gear.Placement.Rotation.Angle
if isinstance(fp.master_gear.Proxy, InvoluteGear) and isinstance(fp.slave_gear.Proxy, InvoluteGear):
fp.master_gear.Placement.Rotation.Angle = np.deg2rad(fp.angle2.Value)
angle_master = fp.master_gear.Placement.Rotation.Angle
angle_master = fp.master_gear.Placement.Rotation.Angle * sum(fp.master_gear.Placement.Rotation.Axis)
dw_master = fp.master_gear.dw
dw_slave = fp.slave_gear.dw
dist = (dw_master + dw_slave) / 2
@@ -88,10 +88,37 @@ class GearConnector(object):
mat1.move(fp.master_gear.Placement.Base)
fp.slave_gear.Placement = mat1
if isinstance(fp.master_gear.Proxy, InternalInvoluteGear) and isinstance(fp.slave_gear.Proxy, InvoluteGear):
angle_master = fp.master_gear.Placement.Rotation.Angle * sum(fp.master_gear.Placement.Rotation.Axis)
dw_master = fp.master_gear.dw
dw_slave = fp.slave_gear.dw
dist = (dw_master - dw_slave) / 2
if fp.master_gear.shift != 0 or fp.slave_gear.shift != 0:
dist, alpha_w = compute_shifted_gears(
fp.master_gear.module,
np.deg2rad(fp.master_gear.pressure_angle.Value),
fp.master_gear.teeth,
fp.slave_gear.teeth,
fp.master_gear.shift,
fp.slave_gear.shift)
mat0 = FreeCAD.Matrix() # unity matrix
trans = FreeCAD.Vector(dist)
mat0.move(trans)
rot = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), fp.angle1).toMatrix()
angle2 = -dw_master / dw_slave * fp.angle1.Value
angle4 = -dw_master / dw_slave * np.rad2deg(angle_master)
rot2 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), angle2).toMatrix()
angle3 = abs(fp.slave_gear.teeth % 2 - 1) * 180. / fp.slave_gear.teeth
rot3 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), angle3).toMatrix()
rot4 = FreeCAD.Rotation(FreeCAD.Vector(0,0,1), -angle4).toMatrix()
mat1 = rot * mat0 * rot2 * rot3 * rot4
mat1.move(fp.master_gear.Placement.Base)
fp.slave_gear.Placement = mat1
if ((isinstance(fp.master_gear.Proxy, InvoluteGear) and isinstance(fp.slave_gear.Proxy, InvoluteGearRack))
or (isinstance(fp.master_gear.Proxy, CycloidGear) and isinstance(fp.slave_gear.Proxy, CycloidGearRack))):
fp.master_gear.Placement.Rotation.Angle = np.deg2rad(fp.angle2.Value)
angle_master = fp.master_gear.Placement.Rotation.Angle
angle_master = fp.master_gear.Placement.Rotation.Angle * sum(fp.master_gear.Placement.Rotation.Axis)
dw_master = fp.master_gear.dw.Value
dw_slave = 0
dist = -(dw_master + dw_slave) / 2
@@ -107,8 +134,7 @@ class GearConnector(object):
fp.slave_gear.Placement = mat3
if isinstance(fp.master_gear.Proxy, CycloidGear) and isinstance(fp.slave_gear.Proxy, CycloidGear):
fp.master_gear.Placement.Rotation.Angle = np.deg2rad(fp.angle2.Value)
angle_master = fp.master_gear.Placement.Rotation.Angle
angle_master = fp.master_gear.Placement.Rotation.Angle * sum(fp.master_gear.Placement.Rotation.Axis)
dw_master = fp.master_gear.dw
dw_slave = fp.slave_gear.dw
dist = (dw_master + dw_slave) / 2