cadquery/monitor/lower_arm.py

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Python
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# This is the arm from the tripod to the "elbow"
import cadquery2 as cq
from cadquery2 import exporters
from hinge import hinge_gap, hinge_w
# monitor hinge dimensions
inner_monitor_hinge = 3.2 / 2
outer_monitor_hinge = hinge_w / 2
# tripod hinge dimensions
inner_tripod_hinge = 7 / 2
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outer_tripod_hinge = 17.5 / 2
tripod_hinge_width = 5.5
monitor_hinge_shape = (
cq.Sketch().circle(outer_monitor_hinge).circle(inner_monitor_hinge, mode="s")
)
tripod_hinge_shape = (
cq.Sketch().circle(outer_tripod_hinge).circle(inner_tripod_hinge, mode="s")
)
arm_width = min(tripod_hinge_width, hinge_gap)
arm_length = 130
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lower_arm = (
cq.Workplane("XY")
.rect(arm_width, arm_width)
.extrude(arm_length)
.edges("|Z or <Z or >Z")
.fillet(0.25)
.faces(">Y")
# Add hinge that connects to the monitor
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.workplane(centerOption="CenterOfBoundBox", offset=(hinge_gap - arm_width) / 2)
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.center(0, arm_length / 2 + (outer_monitor_hinge - inner_monitor_hinge))
.placeSketch(monitor_hinge_shape)
.extrude(-hinge_gap)
.center(0, -(arm_length + outer_tripod_hinge))
# Undo previous offset + new offset
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.workplane(offset=-(hinge_gap - arm_width - tripod_hinge_width + arm_width) / 2)
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# Add hinge that connects to the tripod
.placeSketch(tripod_hinge_shape)
.extrude(-tripod_hinge_width)
)
exporters.export(lower_arm, "lower_arm.svg")