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67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
"""
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name: key_cap.py
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by: Gumyr
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date: September 20th 2022
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desc:
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This example demonstrates the design of a Cherry MX key cap by using
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extrude with a taper and extrude until next.
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See: https://www.cherrymx.de/en/dev.html
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license:
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Copyright 2022 Gumyr
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from build123d import *
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from ocp_vscode import *
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with BuildPart() as key_cap:
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# Start with the plan of the key cap and extrude it
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with BuildSketch() as plan:
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Rectangle(18 * MM, 18 * MM)
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extrude(amount=10 * MM, taper=15)
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# Create a dished top
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with Locations((0, -3 * MM, 47 * MM)):
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Sphere(40 * MM, mode=Mode.SUBTRACT, rotation=(90, 0, 0))
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# Fillet all the edges except the bottom
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fillet(
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key_cap.edges().filter_by_position(Axis.Z, 0, 30 * MM, inclusive=(False, True)),
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radius=1 * MM,
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)
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# Hollow out the key by subtracting a scaled version
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scale(by=(0.925, 0.925, 0.85), mode=Mode.SUBTRACT)
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# Add supporting ribs while leaving room for switch activation
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with BuildSketch(Plane(origin=(0, 0, 4 * MM))):
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Rectangle(15 * MM, 0.5 * MM)
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Rectangle(0.5 * MM, 15 * MM)
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Circle(radius=5.5 * MM / 2)
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# Extrude the mount and ribs to the key cap underside
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extrude(until=Until.NEXT)
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# Find the face on the bottom of the ribs to build onto
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rib_bottom = key_cap.faces().filter_by_position(Axis.Z, 4 * MM, 4 * MM)[0]
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# Add the switch socket
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with BuildSketch(rib_bottom) as cruciform:
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Circle(radius=5.5 * MM / 2)
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Rectangle(4.1 * MM, 1.17 * MM, mode=Mode.SUBTRACT)
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Rectangle(1.17 * MM, 4.1 * MM, mode=Mode.SUBTRACT)
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extrude(amount=3.5 * MM, mode=Mode.ADD)
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assert abs(key_cap.part.volume - 644.8900473617498) < 1e-3
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show(key_cap, alphas=[0.3])
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