model-a/components/usb_hub.py

102 lines
2.2 KiB
Python

import cadquery as cq
from utils import punch_hole, extrude_shape
# Measurements for my USB hub, YMMV
# The hole is for a USB-A plug, y is measured in the hub
# (from the bottom face to middle of the hole)
# Consumers should set proper offsets for the hole
item_w = 17
item_h = 93
holes = [
# USB-A port
{
"x": -item_w / 2,
"y": 4,
"shape": cq.Sketch().trapezoid(13, 5, 90, mode="a").vertices().fillet(1),
},
]
elements = [
# Thing to grab the hub
{
"x": item_w / 2,
"y": 5,
"shape": (
cq.Sketch().trapezoid(22, 10, 90, mode="a").trapezoid(17, 10, 90, mode="s")
),
"height": 8,
},
{
"x": item_w / 2 + 5.5,
"y": item_h - 3,
"shape": (cq.Sketch().circle(2.5, mode="a")),
"height": 8,
},
{
"x": item_w / 2 - 5.5,
"y": item_h - 3,
"shape": (cq.Sketch().circle(2.5, mode="a")),
"height": 8,
},
# Outline
{
"x": item_w / 2,
"y": item_h / 2,
"shape": (
cq.Sketch()
.trapezoid(item_w, item_h, 90, mode="a")
.trapezoid(item_w - 2, item_h - 2, 90, mode="s")
.vertices()
.fillet(3)
),
"height": 0.2,
},
]
def add(
*,
model,
width,
height,
thickness,
offset_x,
offset_y,
bottom_face,
back_face,
shell_t
):
# USB Hub extrusions
if bottom_face:
for element in elements:
model = extrude_shape(
model=model,
face=bottom_face,
w=width,
h=height,
x_offset=offset_x,
y_offset=shell_t + offset_y,
element=element,
height=-(element["height"] + shell_t),
)
# Holes
if back_face:
for hole in holes:
model = punch_hole(
model=model,
face=back_face,
w=width,
h=thickness,
x_offset=width - offset_x,
y_offset=shell_t,
hole=hole,
depth=shell_t,
)
return model