cadquery/notebook_nueva/screen_mount.py

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

# Size of the whole object
width = kbd_width + 2 * shell_t
height = 69
thickness = 10

# Visible screen size
vis_w = 220
vis_h = 58
viewport_cutout = cq.Sketch().trapezoid(vis_w, vis_h, 90, mode="a")

# Whole screen size
scr_w = 231
scr_h = 65
scr_thickness = 5.5
screen_cutout = cq.Sketch().trapezoid(scr_w, scr_h, 90, mode="a")

# Circuit board and cable hole.
# This is in the back of the screen, and is a bit shorter in height than the
# screen. It's wider so it removes enough material to make the shape simpler.
board_cutout = cq.Sketch().trapezoid(
    scr_w + 5,
    scr_h - 10,
    90,
    mode="a",
)


def model():
    return (
        cq.Workplane("XY")
        .workplane().tag("mid_height")
        .box(width, 59, 62)
        .faces(">Z")
        .transformed(rotate=(45, 0, 0))
        # Move the screen "lower" so it doesn't interfere
        # so much with the back
        .center(0, -2)
        .tag("slanted")
        # Arbitrary huge trapezoid to cut off the material *in front*
        # of the inclined screen
        .placeSketch(cq.Sketch().trapezoid(1000, 1000, 90, mode="a"))
        .cutBlind(1000)
        # Cut off viewport hole so we can see the screen
        .workplaneFromTagged("slanted")
        .placeSketch(viewport_cutout)
        .cutBlind(-shell_t)
        # Make hole for screen assembly so the whole screen fits
        .workplaneFromTagged("slanted")
        .workplane(offset=-shell_t, centerOption="CenterOfBoundBox")
        # Left bezel is wider than right one, so this hole is displaced to the left
        .center(-3, 0)
        .placeSketch(screen_cutout)
        .cutBlind(-scr_thickness)
        # Trim the top
        .workplaneFromTagged("mid_height")
        .workplane(offset=21)
        .placeSketch(cq.Sketch().trapezoid(1000, 1000, 90, mode="a"))
        .cutBlind(100)
        # Make it hollow
        .faces("<Z")
        .shell(-2)
        # Cut hole for the screen board and cables
        .workplaneFromTagged("slanted")
        .workplane(offset=-scr_thickness, centerOption="CenterOfBoundBox")
        .placeSketch(board_cutout)
        .cutBlind(-5)
        # Fillet top of the object
        .edges(">Z and |X").fillet(5)
    )


exporters.export(model(), "screen_mount.stl")

left_cutout = cq.Sketch().polygon(
    [(0, 0), (160, 0), (160, -100), (0, -100), (0, 0)],
    mode="a",
)

right_side = (
    model()
    .faces("<Z")
    .workplane(centerOption="CenterOfBoundBox", offset=3)
    .center(-width / 2, height / 2)
    .placeSketch(left_cutout)
    .cutBlind(-100)
)

exporters.export(right_side, "right_screen_mount.stl")

left_side = (
    model()
    .faces("<Z")
    .workplane(centerOption="CenterOfBoundBox", offset=3)
    .center(0, height / 2)
    .placeSketch(left_cutout)
    .cutBlind(-100)
)

exporters.export(left_side, "left_screen_mount.stl")