model-a/components/battery_holder.py

151 lines
3.5 KiB
Python

import cadquery as cq
from utils import extrude_shape, punch_hole, hex_vents
stand_positions = [(3.5, 3.5), (61.5, 3.5), (61.5, 52.5), (3.5, 52.5)]
stands = (
cq.Sketch().push(stand_positions).circle(3, mode="a").circle(2.65 / 2, mode="s")
)
pillar_height = 7
width = 85
height = 56
# This is a holder for DuPont cables so they connect to this
# things' pogo pins which are used to power the CPU
pin_positions = [(3.5, 0), (4 * 2.54 + 3.5, 0)]
pin_holder_width = 25
pin_holder_height = 15
pin_holder = (
cq.Sketch()
.polygon(
[
(0.5, 0),
(pin_holder_width, 0),
(pin_holder_width, pin_holder_height),
(0, pin_holder_height),
(0.5, 0),
],
mode="a",
)
.push(pin_positions)
.polygon(
[(0, 0), (2.6, 0), (2.6, pin_holder_height), (0, pin_holder_height), (0, 0)],
mode="s",
)
)
elements = [
# Battery holder stands
{
"x": 0,
"y": 0,
"shape": stands,
"height": pillar_height,
},
{
"x": 0,
"y": 0,
"shape": cq.Sketch().push(stand_positions).circle(5),
"height": 0,
},
# Pogo pin connector channels
{
"x": 3.5,
"y": 43.5,
"shape": pin_holder,
"height": 3,
},
# Perimeter
{
"x": width / 2,
"y": height / 2,
"shape": (
cq.Sketch()
.trapezoid(width, height, 90, mode="a")
.trapezoid(width - 2, height - 2, 90, mode="s")
.vertices()
.fillet(3)
),
"height": 0.2,
},
]
vents = hex_vents(size=3, width=width, height=height)
# Hole distances are relative to the rightmost pillar
# seen from the back of the case, that's why they are negative
# Heights are relative to base of pillars
# All distances are measured to the CENTER of the hole
holes = [
# Power inlet
{
"x": -18.5,
"y": -1 + pillar_height,
"shape": cq.Sketch().trapezoid(12, 6.5, 90, mode="a").vertices().fillet(1),
},
# Power button
{
"x": -70,
"y": 5.5 + pillar_height,
"shape": cq.Sketch().trapezoid(7, 7, 90, mode="a").vertices().fillet(1),
},
]
def add(
*,
model,
width,
height,
thickness,
offset_x,
offset_y,
bottom_face,
back_face,
shell_t
):
if bottom_face:
# Vents
for vent in vents:
model = punch_hole(
model=model,
face=bottom_face,
w=width,
h=height,
x_offset=offset_x + vent["x"],
y_offset=shell_t + offset_y + vent["y"],
hole=vent,
depth=shell_t,
)
# Battery holder stands and pogo pin holder
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),
)
if back_face:
# Holes
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