$fn = 72;
/*
* Top screw holes are 15mm from top of case
* Side screws are 6.5mm from side of case
* Top middle screw post is 29.3mm long
* Other screw posts are 12mm long
* Screw post outer diameter 6.25mm
* Screw post inner diameter 3mm
* Horizontal ridge interval: 55.5mm
* Vertical ridge interval: 31.3mm
* Ridge thickness: 1.25mm
* First horizontal ridge: Starts at keyboard X offset
* First vertical ridge: 8mm
*/
key_switch_height = 11.10;
key_switch_sizes = [
[0.5, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0],
[1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.5],
[1.25, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.25],
[1.75, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.75],
[1.0, 1.25, 1.25, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]
];
pcb_height = 1.600;
pcb_screw_holes = [
[ 4.7625, 85.7250],
[ 66.6750, 85.7250],
[161.9250, 85.7250],
[238.1250, 85.7250],
[ 61.9125, 47.6250],
[138.1125, 47.6250],
[214.3125, 47.6250],
[ 20.2406, 9.5250],
[123.8250, 9.5250],
[238.1250, 9.5250]
];
module top_case(key_switch_sizes, pcb_screw_holes) {
case_width_top = 317.5000;
case_width_bottom = 320.0000;
case_length_top = 150.0000;
case_length_bottom = 151.5000;
wall_width = 2.5000;
wall_height = 17.2500;
key_switch_width = 19.0500;
key_switch_length = 19.0500;
keyboard_width = key_switch_width * 13.5;
keyboard_length = key_switch_length * 5.0;
keyboard_x_offset = 12.2500;
keyboard_y_offset = 12.2500;
accent_width = 1.0000;
accent_depth = 0.5;
accent_y_stride = (keyboard_length - accent_width) / 5.0;
accent_y_bottom = keyboard_y_offset;
fin_width = 2.0000;
fin_gap_width = 2.0000;
fin_gap_length = wall_width;
fin_gap_height = 12.0000;
fin_gap_count = 32;
fin_gap_x_first = keyboard_x_offset + keyboard_width - fin_gap_count * (fin_width + fin_gap_width);
fin_gap_y_offset = case_length_bottom - fin_gap_length;
module fascia() {
linear_extrude(wall_width)
difference() {
square([case_width_bottom, case_length_bottom], false);
translate([keyboard_x_offset, keyboard_y_offset, 0])
square([keyboard_width, keyboard_length], false);
}
}
module fin_gaps() {
for (i = [0:fin_gap_count]) {
x = fin_gap_x_first + (i * (fin_width + fin_gap_width));
translate([x, fin_gap_y_offset, wall_height - fin_gap_height])
cube([fin_gap_width, fin_gap_length, fin_gap_height], false);
}
}
module accents() {
for (y = [accent_y_bottom: accent_y_stride: case_length_bottom]) {
/* Top */
translate([0, y, wall_height - accent_depth])
cube([case_width_bottom, accent_width, accent_depth], false);
/* Right */
translate([case_width_bottom - accent_depth, y, 0])
cube([accent_depth, accent_width, wall_height], false);
/* Left */
translate([0, y, 0])
cube([accent_depth, accent_width, wall_height], false);
}
}
module body() {
translate([0, 0, wall_height - wall_width])
fascia();
/* Upper */
translate([0, case_length_bottom - wall_width, 0])
cube([case_width_bottom, wall_width, wall_height - wall_width], false);
/* Right */
translate([case_width_bottom - wall_width, 0, 0])
cube([wall_width, case_length_bottom, wall_height - wall_width], false);
/* Lower */
cube([case_width_bottom, wall_width, wall_height - wall_width], false);
/* Left */
cube([wall_width, case_length_bottom, wall_height - wall_width], false);
}
module screw_holes() {
pcb_screw_diameter = 2.5;
for (screw_hole = pcb_screw_holes) {
translate([screw_hole[0], screw_hole[1], 0])
cylinder(h=wall_width, d=pcb_screw_diameter);
}
}
module keyboard_deck() {
key_switch_footprint = [15.25, 15.25];
function add(v) = [for(p=v) 1]*v;
function slice(v, x, y) = [for (i=[x:y]) v[i]];
function addrange(v, x, y) = add(slice(v, x, y));
module key_switch_plate(key_switch_size) {
plate_width = key_switch_width * key_switch_size;
plate_length = key_switch_length;
if (key_switch_size <= 0.5) {
cube([key_switch_width * key_switch_size,
key_switch_length,
wall_width], false);
} else {
hole_width = key_switch_footprint[0];
hole_length = key_switch_footprint[1];
hole_x = plate_width / 2 - hole_width / 2;
hole_y = plate_length / 2 - hole_length / 2;
linear_extrude(wall_width)
difference() {
square([plate_width, plate_length], false);
translate([hole_x, hole_y, 0])
square([hole_width, hole_length], false);
}
}
}
module walls() {
/* Upper */
translate([-wall_width, keyboard_length, 0])
cube([keyboard_width + 2 * wall_width, wall_width, key_switch_height - wall_width], false);
/* Right */
translate([keyboard_width, -wall_width, 0])
cube([wall_width, keyboard_length + 2 * wall_width, key_switch_height - wall_width], false);
/* Lower */
translate([-wall_width, -wall_width, 0])
cube([keyboard_width + 2 * wall_width, wall_width, key_switch_height - wall_width], false);
/* Left */
translate([-wall_width, -wall_width, 0])
cube([wall_width, keyboard_length + 2 * wall_width, key_switch_height - wall_width], false);
}
module body() {
rows = len(key_switch_sizes);
for (i = [0: rows-1]) {
y = key_switch_length * (rows - 1 - i);
key_switch_row = key_switch_sizes[i];
cols = len(key_switch_row);
for (j = [0: cols-1]) {
x = key_switch_width * ((j == 0)?
0:
addrange(key_switch_row, 0, j-1));
key_switch_size = key_switch_row[j];
translate([x, y, 0])
key_switch_plate(key_switch_size);
}
}
}
difference() {
body();
screw_holes();
}
walls();
}
difference() {
body();
accents();
fin_gaps();
}
keyboard_deck_z_offset = wall_height - key_switch_height;
translate([keyboard_x_offset, keyboard_y_offset, keyboard_deck_z_offset])
keyboard_deck();
}
top_case(key_switch_sizes, pcb_screw_holes);