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$fn = 72;
include <keyboard.scad>
module keyboard_base_plate(pcb_dimensions, pcb_screw_holes, switch_z_range) {
pcb_width = pcb_dimensions[0];
pcb_length = pcb_dimensions[1];
pcb_height = pcb_dimensions[2];
switch_z_min = switch_z_range[0];
switch_z_max = switch_z_range[1];
pcb_clearance_edge = 1.0;
pcb_clearance_bottom = -switch_z_min - pcb_height + 0.5;
pcb_screw_diameter = 2.5;
pcb_screw_hole_diameter = 2.5;
pcb_screw_height = 3.0;
thickness = 1.75;
corner_radius = 0.2;
case_color = [0.5, 0.5, 0.5, 1.0];
wall_width = pcb_width + 2 * (pcb_clearance_edge + thickness) - 2 * corner_radius;
wall_length = pcb_length + 2 * (pcb_clearance_edge + thickness) - 2 * corner_radius;
wall_height = pcb_screw_height + pcb_height + switch_z_max;
bottom_width = 2 * (pcb_clearance_edge) + pcb_width;
bottom_length = 2 * (pcb_clearance_edge) + pcb_length;
bottom_height = thickness;
module round_corner(rotation) {
color(case_color)
rotate(rotation)
rotate_extrude(angle=90) {
intersection() {
circle(r=corner_radius);
square(corner_radius*2);
}
}
}
module round_edge(rotation, length) {
color(case_color)
rotate(rotation)
linear_extrude(length)
intersection() {
circle(r=corner_radius);
square(corner_radius*2);
}
}
module panel(dimensions) {
color(case_color)
linear_extrude(dimensions[2])
square([dimensions[0], dimensions[1]], false);
}
module wall_corner(rotation, radius, length) {
color(case_color)
rotate(rotation)
linear_extrude(length)
intersection() {
circle(r=radius);
square([radius, radius], false);
}
}
module screw_post(h, d) {
diameter_outer = 3 * d;
diameter_inner = d;
color(case_color)
difference() {
cylinder(h=h, r=(diameter_outer / 2.0) * 1.5);
cylinder(h=h, r= diameter_inner / 2.0);
}
}
module ridges(width, height) {
horizontal = [
(bottom_length / 3),
(bottom_length / 3) * 2
];
vertical = [
(bottom_width / 3),
(bottom_width / 3) * 2
];
for (y = horizontal) {
translate([0 - pcb_clearance_edge, y, 0])
panel([bottom_width, width, height]);
}
for (x = vertical) {
translate([x, 0 - pcb_clearance_edge, 0])
panel([width, bottom_length, height]);
}
}
/* Upper wall */
translate([-pcb_clearance_edge - thickness + corner_radius,
pcb_clearance_edge + pcb_length,
-thickness + corner_radius])
panel([wall_width, thickness, wall_height + thickness - corner_radius]);
/* Right wall */
translate([ pcb_clearance_edge + pcb_width,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
panel([thickness, wall_length, wall_height + thickness - corner_radius]);
/* Lower wall */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness,
-thickness + corner_radius])
panel([wall_width, thickness, wall_height + thickness - corner_radius]);
/* Left wall */
translate([-pcb_clearance_edge - thickness,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
panel([thickness, wall_length, wall_height + thickness - corner_radius]);
/* Upper right wall corner */
translate([pcb_clearance_edge + thickness + pcb_width - corner_radius,
pcb_clearance_edge + thickness + pcb_length - corner_radius,
-thickness + corner_radius])
wall_corner([0, 0, 0],
corner_radius,
wall_height + thickness - corner_radius);
/* Lower right wall corner */
translate([ pcb_clearance_edge + thickness + pcb_width - corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
wall_corner([0, 0, 270],
corner_radius,
wall_height + thickness - corner_radius);
/* Lower left wall corner */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
wall_corner([0, 0, 180],
corner_radius,
wall_height + thickness - corner_radius);
/* Upper left wall corner */
translate([-pcb_clearance_edge - thickness + corner_radius,
pcb_clearance_edge + pcb_length + thickness - corner_radius,
-thickness + corner_radius])
wall_corner([0, 0, 90],
corner_radius,
wall_height + thickness - corner_radius);
/* Bottom plate */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness])
panel([bottom_width + 2 * thickness - 2 * corner_radius,
bottom_length + 2 * thickness - 2 * corner_radius,
thickness]);
/* Upper edge */
translate([-pcb_clearance_edge - thickness + corner_radius,
pcb_clearance_edge + thickness + pcb_length - corner_radius,
-thickness + corner_radius])
round_edge([0, 90, 0], wall_width);
/* Right edge */
translate([ pcb_clearance_edge + thickness + pcb_width - corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
round_edge([270, 0, 0], wall_length);
/* Lower edge */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
round_edge([90, 180, 90], wall_width);
/* Left edge */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
round_edge([270, 90, 0], wall_length);
/* Upper right corner */
translate([pcb_clearance_edge + thickness + pcb_width - corner_radius,
pcb_clearance_edge + thickness + pcb_length - corner_radius,
-thickness + corner_radius])
round_corner([90, 90, 90]);
/* Lower right corner */
translate([ pcb_clearance_edge + thickness + pcb_width - corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
round_corner([180, 90, 90]);
/* Lower left corner */
translate([-pcb_clearance_edge - thickness + corner_radius,
-pcb_clearance_edge - thickness + corner_radius,
-thickness + corner_radius])
round_corner([-90, 90, 90]);
/* Upper left corner */
translate([-pcb_clearance_edge - thickness + corner_radius,
pcb_clearance_edge + thickness + pcb_length - corner_radius,
-thickness + corner_radius])
round_corner([0, 90, 90]);
/* Screw holes */
for (screw_hole = pcb_screw_holes) {
translate([screw_hole[0], screw_hole[1], 0])
screw_post(pcb_screw_height,
pcb_screw_diameter);
}
/* Ridges (for rigidity!) */
ridges(thickness * 2, pcb_clearance_bottom / 2);
}
keyboard_base_plate([keyboard_pcb_width, keyboard_pcb_length, keyboard_pcb_height],
keyboard_pcb_screw_holes,
[-keyboard_switch_leg_length, keyboard_switch_height]);
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