Mounting pillars and screwholes to join top and bottom cases

This commit is contained in:
Roberto Alsina 2022-11-28 15:09:49 -03:00
parent f549fb32b0
commit 2a48edb3cf
8 changed files with 150817 additions and 88501 deletions

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@ -21,7 +21,9 @@ thickness = 20 + shell_t # 20 inside
ti_radius = 2.35
ti_depth = 6.25
pillars = (
# Positions are determined by measuring the keyboard
# mounting holes
kbd_pillars = (
cq.Sketch()
.push(
[
@ -34,9 +36,30 @@ pillars = (
]
)
.circle(6, mode="a")
# Holes for M3 threaded inserts
.circle(ti_radius, mode="s")
)
# These are placed where convenient, and are used to join the top and bottom
# parts of the case.
# Measured from top-left corner OUTSIDE
mounting_pillar_positions = [
(6, -6),
(width - 6, -6),
(width - 6, -40),
(120, -6),
(170, -6),
]
mounting_pillars = (
cq.Sketch()
.push(mounting_pillar_positions)
.trapezoid(12, 12, 90, mode="a")
.circle(1.5, mode="s")
)
screw_holes = cq.Sketch().push(mounting_pillar_positions).circle(3, mode="a")
battery_holder = (
cq.Sketch()
.polygon(
@ -49,6 +72,11 @@ battery_holder = (
[(-67, 3), (0, 3), (0, -10), (-67, -10), (-67, 3)],
mode="s",
)
# Cutout for the
.polygon(
[(-67, 30), (0, 30), (0, 12), (-67, 12), (-67, 30)],
mode="s",
)
)
@ -57,6 +85,9 @@ usb_in = cq.Sketch().trapezoid(13, 5.5, 90, mode="a")
switch_in = cq.Sketch().trapezoid(13.5, 8, 90, mode="a")
# Motherboard mount
def model():
return (
cq.Workplane("XY")
@ -88,7 +119,7 @@ def model():
# Hole for power switch
.faces(">Y")
.workplane(centerOption="CenterOfBoundBox")
.center(-height / 2 + shell_t + 50, 0)
.center(0, 0)
.placeSketch(switch_in)
.cutBlind(-shell_t)
# Slanted mounting pillars on the kbd top
@ -98,7 +129,7 @@ def model():
.center(-width / 2 + shell_t, kbd_height - height / 2 + shell_t)
.transformed(rotate=cq.Vector(kbd_angle, 0, 0))
.tag("sloped")
.placeSketch(pillars)
.placeSketch(kbd_pillars)
.extrude(-1000)
# Remove the excess extrusion
.workplaneFromTagged("mid_height")
@ -107,15 +138,30 @@ def model():
# Slope for the beyboard
.workplaneFromTagged("sloped")
.split(keepBottom=True)
# Pillars to join with top half
.workplaneFromTagged("mid_height")
.workplane(offset=-thickness / 2, centerOption="CenterOfBoundBox")
.center(-width / 2, height / 2)
.placeSketch(mounting_pillars)
.extrude(thickness)
# Holes to insert screws from the bottom
.workplaneFromTagged("mid_height")
.workplane(offset=-thickness / 2, centerOption="CenterOfBoundBox")
.center(-width / 2, height / 2)
.placeSketch(screw_holes)
# 13 is 20-7 (screw thread length - threaded insert depth)
.cutBlind(thickness - 13)
)
left_cutout = cq.Sketch().polygon(
if __name__ == "__main__":
left_cutout = cq.Sketch().polygon(
[(0, 0), (160, 0), (160, -100), (135, -100), (135, -200), (0, -200), (0, 0)],
mode="a",
)
)
right_side = (
right_side = (
model()
.faces("<Z")
.workplaneFromTagged("mid_height")
@ -123,11 +169,11 @@ right_side = (
.center(-width / 2, height / 2)
.placeSketch(left_cutout)
.cutBlind(100)
)
)
exporters.export(right_side, "right_side.stl")
exporters.export(right_side, "right_side.stl")
right_cutout = cq.Sketch().polygon(
right_cutout = cq.Sketch().polygon(
[
(160, 0),
(width, 0),
@ -138,9 +184,9 @@ right_cutout = cq.Sketch().polygon(
(160, 0),
],
mode="a",
)
)
left_side = (
left_side = (
model()
.faces("<Z")
.workplaneFromTagged("mid_height")
@ -148,7 +194,7 @@ left_side = (
.center(-width / 2, height / 2)
.placeSketch(right_cutout)
.cutBlind(100)
)
exporters.export(left_side, "left_side.stl")
)
exporters.export(left_side, "left_side.stl")
exporters.export(model(), "model.stl")
exporters.export(model(), "model.stl")

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@ -1,21 +1,19 @@
import cadquery2 as cq
from cadquery2 import exporters
# Some dimensions copied from modelo.py,
# TODO refactor into a separate file
# Thickness of the outer material
shell_t = 3
# Size of the kbd board
kbd_height = 98
kbd_width = 286
kbd_angle = 5
from modelo import (
kbd_height,
kbd_width,
mounting_pillar_positions,
shell_t,
ti_depth,
ti_radius,
)
# Size of the whole object
width = kbd_width + 2 * shell_t
height = 69
thickness = 10
height = 59
thickness = 62 # Will be shorter after construction
# Visible screen size
vis_w = 220
@ -40,13 +38,20 @@ board_cutout = cq.Sketch().trapezoid(
kbd_cable_hole = cq.Sketch().trapezoid(15, 5, 90, mode="a").vertices().fillet(1)
mounting_pillars = (
cq.Sketch()
.push(mounting_pillar_positions)
.trapezoid(12, 12, 90, mode="a")
.circle(ti_radius, mode="s")
)
def model():
return (
cq.Workplane("XY")
.workplane()
.tag("mid_height")
.box(width, 59, 62)
.box(width, height, thickness)
# The screen goes at a 45 degree angle
.faces(">Z")
.transformed(rotate=(45, 0, 0))
@ -76,7 +81,8 @@ def model():
.cutBlind(100)
# Make it hollow
.faces("<Z")
.shell(-2.5)
# Can't be exactly shell_t because cq fails
.shell(-shell_t + 0.01)
# Cut hole for the screen board and cables
.workplaneFromTagged("slanted")
.workplane(offset=-scr_thickness, centerOption="CenterOfBoundBox")
@ -88,9 +94,15 @@ def model():
# Make small hole for the keyboard cable
.faces(">Y")
.workplane(offset=-5, centerOption="CenterOfBoundBox")
.center(width / 2 - 128, -23)
.center(-width / 2 + 128, -23)
.placeSketch(kbd_cable_hole)
.cutBlind(-1000)
# Pillars to join with bottom half
.workplaneFromTagged("mid_height")
.workplane(offset=-thickness / 2, centerOption="CenterOfBoundBox")
.center(-width / 2, height / 2)
.placeSketch(mounting_pillars)
.extrude(10)
)
@ -99,7 +111,7 @@ exporters.export(model(), "screen_mount.stl")
right_side = (
model()
.faces(">X")
.workplane(centerOption="CenterOfBoundBox", offset=-140)
.workplane(centerOption="CenterOfBoundBox", offset=-width / 2)
.center(0, height / 2)
.split(keepTop=True)
)
@ -109,7 +121,7 @@ exporters.export(right_side, "right_screen_mount.stl")
left_side = (
model()
.faces(">X")
.workplane(centerOption="CenterOfBoundBox", offset=-140)
.workplane(centerOption="CenterOfBoundBox", offset=-width / 2)
.center(0, height / 2)
.split(keepBottom=True)
)

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