265 lines
6.9 KiB
Python
265 lines
6.9 KiB
Python
import cadquery as cq
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from cadquery import exporters
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import audio_plug
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import battery_holder
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import usb_hub
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import zero_holder as cpu_holder
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from utils import extrude_shape, punch_hole, punch_hole2
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# Base for the notebook. Basically a kbd base that extends back
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# as much as possible
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# Thickness of the outer material
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shell_t = 3
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# Size of the kbd board
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kbd_height = 95.5
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kbd_width = 305
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kbd_angle = 5
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# Size of the whole object
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width = kbd_width + 2 * shell_t
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height = 159
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thickness = 27 + shell_t # 27 inside
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# Insert Positions
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ti_radius = 2.35
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ti_depth = 6.25
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# Positions are determined by measuring the keyboard
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kbd_pillar_positions = [
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(18.25, -16),
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(142.5, -25.5),
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(kbd_width - 20, -16),
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(23.5, -79.5),
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(145.5, -82.5),
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(kbd_width - 19, -79.5),
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]
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# 2-level mounting pillars for the kbd
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# Width of these need to be tweaked for
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# each specific keyboard
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kbd_pillars = (
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cq.Sketch()
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.push(kbd_pillar_positions)
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.circle(2.2, mode="a")
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# Holes for self-tapping screws
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.circle(1.1, mode="s")
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)
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kbd_lower_pillars = (
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cq.Sketch()
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.push(kbd_pillar_positions)
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.circle(4, mode="a")
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# Holes for self-tapping screws
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.circle(1.1, mode="s")
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)
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# These are placed where convenient, and are used to join the top and bottom
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# parts of the case.
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# Measured from top-left corner OUTSIDE
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mounting_pillar_positions = [
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(6, -6),
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(6, -40),
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(120, -6),
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(170, -6),
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(width - 6, -6),
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(width - 6, -30),
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]
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mounting_pillars = (
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cq.Sketch()
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.push(mounting_pillar_positions)
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.trapezoid(12, 12, 90, mode="a")
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.circle(1.8, mode="s")
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)
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screw_holes = cq.Sketch().push(mounting_pillar_positions).circle(3, mode="a")
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# Thing to "grab" the hub so it stays in place
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# Distance from edge to center of USB plug
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usb_offset = 48
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# CPU holder position from back-left corner of the case
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cpu_offset_x = 160
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cpu_offset_y = 25
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# Battery holder position from back-left corner of the case
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battery_offset_x = 19
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battery_offset_y = 5
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# Offset for the USB port from back-right corner of the case
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usb_offset = 48
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def model():
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# Create the basic shape of the case bottom.
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# Currently also adds keyboard stuff and things to connect
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# to the screen case, but that should be refactored
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# out (FIXME)
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model = (
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cq.Workplane("XY")
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.workplane(offset=thickness / 2)
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.tag("mid_height")
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# Hollow box
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.box(width, height, thickness)
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.edges("|Z")
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.fillet(2)
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.faces(">Z")
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.shell(-shell_t)
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# Slanted mounting pillars on the kbd top
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.faces(">Z")
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.workplane(centerOption="CenterOfBoundBox")
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# Top-left kbd corner inside the box
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.center(-width / 2 + shell_t, kbd_height - height / 2 + shell_t)
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.transformed(rotate=cq.Vector(kbd_angle, 0, 0))
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# These two offsets push the keyboard "down" into the case
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# and need to be adjusted per-keyboard
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.tag("sloped")
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.workplane(offset=-2.5)
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.placeSketch(kbd_pillars)
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.extrude(-1000)
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.workplaneFromTagged("sloped")
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.workplane(offset=-5.5)
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.placeSketch(kbd_lower_pillars)
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.extrude(-1000)
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# Remove the excess extrusion
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.workplaneFromTagged("mid_height")
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.transformed(offset=cq.Vector(0, 0, -thickness / 2))
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.split(keepTop=True)
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# Slope for the beyboard
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.workplaneFromTagged("sloped")
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.split(keepBottom=True)
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# Pillars to join with top half
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.workplaneFromTagged("mid_height")
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.workplane(offset=-thickness / 2, centerOption="CenterOfBoundBox")
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.center(-width / 2, height / 2)
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.placeSketch(mounting_pillars)
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.extrude(thickness)
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# Holes to insert screws from the bottom
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.workplaneFromTagged("mid_height")
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.workplane(offset=-thickness / 2, centerOption="CenterOfBoundBox")
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.center(-width / 2, height / 2)
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.placeSketch(screw_holes)
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# 13 is 20-7 (screw thread length - threaded insert depth)
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.cutBlind(thickness - 13)
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)
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# Now the basic box shape is in place, start adding things
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# and cutting holes.
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# Hole for USB hub in the back
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for hole in usb_hub.holes:
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model = punch_hole(
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model=model,
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face=">Y",
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w=width,
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h=thickness,
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x_offset=usb_offset + shell_t + usb_hub.holes[0]["width"] / 2,
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y_offset=shell_t,
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hole=hole,
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depth=shell_t,
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)
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# USB hub holder
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for element in usb_hub.elements:
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model = extrude_shape(
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model=model,
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face="<Z",
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w=width,
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h=height,
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x_offset=width - usb_offset - shell_t - +usb_hub.holes[0]["width"] / 2,
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y_offset=shell_t + element["y"],
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shape=element["shape"],
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height=-(element["height"] + shell_t),
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)
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# Hole for audio in right side
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for hole in audio_plug.holes:
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model = punch_hole(
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model=model,
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face=">X",
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w=height,
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h=thickness,
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x_offset=height - shell_t - 34.5 - audio_plug.holes[0]["width"] / 2,
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y_offset=shell_t,
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hole=hole,
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depth=shell_t,
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)
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model = cpu_holder.add(
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model=model,
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width=width,
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height=height,
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thickness=thickness,
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offset_x=cpu_offset_x,
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offset_y=cpu_offset_y,
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bottom_face="<Z",
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back_face=None, # Not exposing the holes
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shell_t=shell_t,
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)
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# This adds all the holes and extrusions for the battery system
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model = battery_holder.add(
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model=model,
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width=width,
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height=height,
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thickness=thickness,
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offset_x=battery_offset_x,
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offset_y=battery_offset_y,
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bottom_face="<Z",
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back_face=">Y",
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shell_t=shell_t,
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)
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return model
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if __name__ == "__main__":
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left_cutout = cq.Sketch().polygon(
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[(0, 0), (width / 2, 0), (width / 2, -height), (0, -height), (0, 0)],
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mode="a",
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)
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right_side = (
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model()
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.faces("<Z")
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.workplaneFromTagged("mid_height")
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.transformed(offset=cq.Vector(0, 0, -thickness / 2))
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.center(-width / 2, height / 2)
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.placeSketch(left_cutout)
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.cutBlind(100)
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)
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exporters.export(right_side, "right_side.stl")
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right_cutout = cq.Sketch().polygon(
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[
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(width / 2, 0),
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(width, 0),
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(width, -height),
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(width / 2, -height),
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(width / 2, 0),
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],
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mode="a",
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)
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left_side = (
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model()
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.faces("<Z")
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.workplaneFromTagged("mid_height")
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.transformed(offset=cq.Vector(0, 0, -thickness / 2))
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.center(-width / 2, height / 2)
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.placeSketch(right_cutout)
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.cutBlind(100)
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)
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exporters.export(left_side, "left_side.stl")
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exporters.export(model(), "model.stl")
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