267 lines
8.2 KiB
Python
267 lines
8.2 KiB
Python
import cadquery as cq
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from cadquery import exporters
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import screen_pillars
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from modelo import (
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height,
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mounting_pillar_positions,
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ti_depth,
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ti_radius,
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width,
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thickness as model_thickness,
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shell_t,
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)
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from screen_mount import height_bottom
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import keyboard
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hinge_radius = 5.5
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screw_radius = 1.5 # M3
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ring_radius = 5 # M3
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hinge_offset = max(p[1] for p in mounting_pillar_positions) + 6
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hinge_width = 25
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thickness = 43
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mounting_pillar_positions = [(x, -y) for x, y in mounting_pillar_positions]
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mounting_pillars = (
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cq.Sketch()
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.push(mounting_pillar_positions)
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.trapezoid(-12, 12, 90, mode="a")
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.circle(ti_radius, mode="s")
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.clean()
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)
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# This is a constant used to control how far back the hinges go
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# when open. It's arbitrary and can be adjusted experimentally
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# printing small samples
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hinge_slant = shell_t + 2
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def model():
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# Create a 2-part hinged lid
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model = (
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cq.Workplane("XY")
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# Hollow box
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.workplane(offset=-thickness / 2)
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.box(width, height, thickness)
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.tag("base")
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.edges("|X and >Z and <Y")
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.fillet(10)
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.edges("|X and >Z and >Y")
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.fillet(5)
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.edges("|Z")
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.fillet(2)
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.faces("<Z")
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.shell(-shell_t)
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.faces(">X")
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.workplane()
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.center(height / 2 - hinge_offset, thickness / 2 - hinge_radius)
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.tag("rightSide")
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# Outer surface of the hinge
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.workplaneFromTagged("rightSide")
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.placeSketch(cq.Sketch().circle(hinge_radius))
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.extrude(-hinge_width)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width)
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.placeSketch(cq.Sketch().circle(hinge_radius))
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.extrude(-hinge_width)
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# Cut middle section between the hinges
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.workplaneFromTagged("rightSide")
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.workplane(offset=-hinge_width)
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.placeSketch(
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cq.Sketch().polygon(
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[
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(-hinge_radius, -hinge_radius),
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(-hinge_radius, 0),
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(-hinge_radius - hinge_slant, hinge_radius),
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(-hinge_slant, hinge_radius),
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(-hinge_slant, hinge_radius - hinge_slant),
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(hinge_radius, hinge_radius - hinge_slant),
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(hinge_radius, -hinge_radius),
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(-hinge_radius, -hinge_radius),
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]
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)
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)
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.cutBlind(-width + 2 * hinge_width - 1)
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# Pillars to attach to base
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.workplaneFromTagged("base")
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.workplane(
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centerOption="CenterOfBoundBox", offset=model_thickness - thickness / 2
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)
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.center(-width / 2, height / 2 - shell_t)
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.placeSketch(mounting_pillars)
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.extrude(10)
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# Hole for screws
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.workplaneFromTagged("rightSide")
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.placeSketch(cq.Sketch().circle(screw_radius))
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.cutBlind(-hinge_width)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width)
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.placeSketch(cq.Sketch().circle(screw_radius))
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.cutBlind(-hinge_width)
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# Holes for rings & screw heads
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.workplaneFromTagged("rightSide")
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.placeSketch(cq.Sketch().circle(ring_radius))
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.cutBlind(-5)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + 4)
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.placeSketch(cq.Sketch().circle(ring_radius))
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.cutBlind(-5)
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# Split hinge halves
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.faces(">X")
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.workplaneFromTagged("rightSide")
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.workplane(offset=-hinge_width / 2)
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.placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
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.cutBlind(-1)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-hinge_width)
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.placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
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.cutBlind(-1)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width / 2)
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.placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
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.cutBlind(-1)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width)
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.placeSketch(cq.Sketch().trapezoid(hinge_radius * 2 + 1, hinge_radius * 2, 90))
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.cutBlind(-1)
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# Threaded inserts
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.workplaneFromTagged("rightSide")
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.workplane(offset=-hinge_width / 2)
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.placeSketch(cq.Sketch().circle(ti_radius))
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.cutBlind(-ti_depth)
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width / 2)
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.placeSketch(cq.Sketch().circle(ti_radius))
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.cutBlind(ti_depth)
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# Split two halves
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# First cut for the right hinge
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.workplaneFromTagged("rightSide")
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.placeSketch(
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cq.Sketch()
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.polygon(
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[
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(0, 0),
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(-hinge_radius - 0.2, 0),
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(-hinge_radius - hinge_slant, hinge_radius),
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(0, hinge_radius),
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(0, 0),
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]
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)
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.polygon(
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[
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(-hinge_radius - 0.2, 0),
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(-hinge_radius - 0.2, -1000),
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(-hinge_radius, -1000),
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(-hinge_radius, 0),
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(-hinge_radius - 0.2, 0),
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]
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)
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.circle(hinge_radius, mode="s")
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)
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.cutBlind(-hinge_width / 2 - 1)
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# Second cut for the right hinge
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.workplaneFromTagged("rightSide")
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.workplane(offset=-hinge_width / 2)
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.placeSketch(
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cq.Sketch()
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.polygon(
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[
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(0, 0),
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(hinge_radius + 0.2, 0),
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(hinge_radius + 0.2 + hinge_slant, hinge_radius),
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(0, hinge_radius),
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(0, 0),
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]
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)
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.circle(hinge_radius, mode="s")
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)
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.cutBlind(-hinge_width / 2 - 1)
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# First cut for the left hinge
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width)
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.placeSketch(
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cq.Sketch()
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.polygon(
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[
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(0, 0),
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(hinge_radius + 0.2, 0),
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(hinge_radius + 0.2 + hinge_slant, hinge_radius),
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(0, hinge_radius),
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(0, 0),
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]
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)
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.circle(hinge_radius, mode="s")
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)
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.cutBlind(-hinge_width / 2 - 1)
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# Second cut for the left hinge
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.workplaneFromTagged("rightSide")
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.workplane(offset=-width + hinge_width / 2)
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.placeSketch(
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cq.Sketch()
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.polygon(
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[
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(0, 0),
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(-hinge_radius - 0.2, 0),
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(-hinge_radius - hinge_slant, hinge_radius),
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(0, hinge_radius),
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(0, 0),
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]
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)
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.polygon(
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[
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(-hinge_radius - 0.2, 0),
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(-hinge_radius - 0.2, -1000),
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(-hinge_radius, -1000),
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(-hinge_radius, 0),
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(-hinge_radius - 0.2, 0),
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]
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)
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.circle(hinge_radius, mode="s")
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)
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.cutBlind(-hinge_width / 2 - 1)
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)
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# Cut off shape of the base
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model = (
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model.workplaneFromTagged("rightSide")
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.center(-height + hinge_offset, -thickness + hinge_radius)
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.placeSketch(
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cq.Sketch().polygon(
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[
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(0, 0),
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(0, keyboard.front_thickness),
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(shell_t, keyboard.front_thickness),
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(keyboard.actual_height + shell_t, keyboard.back_thickness),
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(keyboard.actual_height + shell_t, model_thickness),
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(height, model_thickness),
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(height, 0),
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(0, 0),
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]
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)
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)
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.cutBlind(-1000)
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)
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return model
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if __name__ == "__main__":
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model = model()
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exporters.export(model, "hinged_lid.stl")
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exporters.export(
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model,
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"hinged_lid.svg",
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opt={
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"projectionDir": (0, 0, 1),
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"strokeWidth": 0.3,
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},
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)
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