class _Cup(cqparts.Part):
height = PositiveFloat(25.1, doc="cup length")
diam = PositiveFloat(20.4, doc="cup diameter")
thickness = PositiveFloat(15.4, doc="cup thickness for flat profile")
hole_spacing = PositiveFloat(12.4, doc="distance between the holes")
hole_size = PositiveFloat(2, doc="hole size")
step_diam = PositiveFloat(12, doc="step diameter")
step_height = PositiveFloat(0, doc="height if step, if zero no step")
bush_diam = PositiveFloat(6.15, doc="diameter of the bush")
bush_height = PositiveFloat(1.6, doc="height of the bush")
profile = String("flat", doc="profile shape (circle|flat|rect)")
def make(self):
# grab the correct profile
work_plane = cq.Workplane("XY")
cup = _profile(self.profile, self.diam,
self.thickness).extrude(-self.height)
if self.step_height > 0:
step = work_plane.circle(self.step_diam / 2).extrude(
self.step_height)
cup = cup.union(step)
bush = (work_plane.workplane(offset=self.step_height).circle(
self.bush_diam / 2).extrude(self.bush_height))
cup = cup.union(bush)
return cup
def get_cutout(self, clearance=0):
" get the cutout for the shaft"
return (cq.Workplane("XY",
origin=(0, 0, 0)).circle((self.diam / 2) +
clearance).extrude(10))
@property
def mate_bottom(self):
" connect to the bottom of the cup"
return Mate(
self,
CoordSystem(origin=(0, 0, -self.height),
xDir=(1, 0, 0),
normal=(0, 0, 1)),
)
class _BackCover(cqparts.Part):
height = PositiveFloat(6, doc="back length")
diam = PositiveFloat(20.4, doc="back diameter")
thickness = PositiveFloat(15.4, doc="back thickness for flat profile")
profile = String("flat", doc="profile shape (circle|flat|rect)")
bush_diam = PositiveFloat(6.15, doc="diameter of the bush")
bush_height = PositiveFloat(1.6, doc="height of the bush")
_render = render_props(color=(50, 255, 255))
def make(self):
# grab the correct profile
work_plane = cq.Workplane("XY")
back = (work_plane.workplane(offset=-self.height).circle(
self.bush_diam / 2).extrude(-self.bush_height))
if self.height > 0:
back = _profile(self.profile, self.diam,
self.thickness).extrude(-self.height)
back = back.union(back)
return back
class Cylindrical(DCMotor):
profile = String("circle", doc="profile shape (circle|flat|rect)")
class Rect(DCMotor):
profile = String("rect", doc="profile shape (circle|flat|rect)")
class DCMotor(motor.Motor):
"""
DC motors for models
.. image:: /_static/img/motors/DCMotor.png
"""
height = PositiveFloat(25.1, doc="motor length")
diam = PositiveFloat(20.4, doc="motor diameter")
thickness = PositiveFloat(15.4, doc="back thickness for flat profile")
profile = String("flat", doc="profile shape (circle|flat|rect)")
bush_diam = PositiveFloat(6.15, doc="diameter of the bush")
bush_height = PositiveFloat(1.6, doc="height of the bush")
shaft_type = shaft.Shaft # replace with other shaft
shaft_length = PositiveFloat(11.55, doc="length of the shaft")
shaft_diam = PositiveFloat(2, doc="diameter of the shaft")
cover_height = PositiveFloat(0, doc="back cover height")
# a step on the top surface
step_height = PositiveFloat(0, doc="height if step, if zero no step")
step_diam = PositiveFloat(12, doc="step diameter")
def get_shaft(self):
return self.shaft_type
def mount_points(self):
# TODO handle mount points
pass
def make_components(self):
return {
"body":
_Cup(
height=self.height,
thickness=self.thickness,
diam=self.diam,
profile=self.profile,
bush_diam=self.bush_diam,
bush_height=self.bush_height,
step_height=self.step_height,
),
"shaft":
self.shaft_type(length=self.shaft_length, diam=self.shaft_diam),
"back":
_BackCover(
height=self.cover_height,
thickness=self.thickness,
diam=self.diam,
profile=self.profile,
bush_diam=self.bush_diam,
bush_height=self.bush_height,
),
}
def make_constraints(self):
return [
Fixed(self.components["body"].mate_origin),
Coincident(
self.components["shaft"].mate_origin,
self.components["body"].mate_origin,
),
Coincident(self.components["back"].mate_origin,
self.components["body"].mate_bottom),
]