92 lines
2.3 KiB
Python
92 lines
2.3 KiB
Python
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from dataclasses import dataclass
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import math
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import cadquery as Cq
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from nhf import Item, Role
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import nhf.utils
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@dataclass(frozen=True)
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class ThreaddedKnob(Item):
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"""
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Sourced from:
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> Othmro Black 12mm(M12) x 50mm Thread Replacement Star Hand Knob Tightening
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> Screws
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"""
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diam_rod: float
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height_rod: float
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diam_knob: float
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diam_neck: float
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height_neck: float
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height_knob: float
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@property
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def name(self) -> str:
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return f"Knob-M{int(self.diam_rod)}-{int(self.height_rod)}mm"
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def generate(self) -> Cq.Assembly:
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print(self.name)
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knob = Cq.Solid.makeCylinder(
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radius=self.diam_knob / 2,
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height=self.height_knob,
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)
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neck = Cq.Solid.makeCylinder(
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radius=self.diam_neck / 2,
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height=self.height_neck,
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)
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rod = (
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Cq.Workplane('XY')
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.cylinder(
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radius=self.diam_rod / 2,
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height=self.height_rod,
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centered=(True, True, False))
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)
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rod.faces("<Z").tag("tip")
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rod.faces(">Z").tag("root")
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return (
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Cq.Assembly()
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.addS(rod, name="rod", role=Role.CONNECTION)
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.addS(neck, name="neck", role=Role.HANDLE,
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loc=Cq.Location((0, 0, self.height_rod)))
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.addS(knob, name="knob", role=Role.HANDLE,
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loc=Cq.Location((0, 0, self.height_rod + self.height_neck)))
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)
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@dataclass(frozen=True)
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class HexNut(Item):
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diam: float
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pitch: float
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# FIXME: Measure these
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m: float
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s: float
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def __post_init__(self):
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assert self.s > self.diam
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@property
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def name(self):
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return f"HexNut-M{int(self.diam)}-{self.pitch}"
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@property
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def role(self):
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return Role.CONNECTION
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def generate(self) -> Cq.Workplane:
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print(self.name)
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r = self.s / math.sqrt(3)
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result = (
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Cq.Workplane("XY")
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.sketch()
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.regularPolygon(r=r, n=6)
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.circle(r=self.diam/2, mode='s')
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.finalize()
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.extrude(self.m)
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)
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result.faces("<Z").tag("bot")
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result.faces(">Z").tag("top")
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result.copyWorkplane(Cq.Workplane('XY')).tagPlane("dir", direction="+X")
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return result
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