row_spacing = column_spacing;
/* This number should exceed row_spacing and column_spacing. The
- default gives a 1mm = (20mm - 19mm) gap between keycaps and cuts in
- the top plate.*/
+ default gives a 1mm = (20mm - 19mm) gap between keycaps and cuts in
+ the top plate.*/
key_hole_size = 20;
/* rotation angle; the angle between the halves is twice this
n_thumb_keys = 1;
/* The width of the USB cable hole in the spacer. */
-cable_hole_width = 4;
+cable_hole_width = 12;
/* Vertical column staggering offsets. The first element should
be zero. */
staggering_offsets = [0, 5, 11, 6, 3];
+/* Whether or not to split the spacer into quarters. */
+quarter_spacer = false;
+
+/* Where the top/bottom split of a quartered spacer will be. */
+spacer_quartering_offset = 60;
+
module rz(angle, center=undef) {
/* Rotate children `angle` degrees around `center`. */
translate(center) {
rotate(angle) {
translate(-center) {
for (i=[0:$children-1])
- child(i);
+ children(i);
}
}
}
around center. Used to compute locations of screw holes near the
USB cable hole. */
function rz_fun(p, angle, center) = [cos(angle) * (p[0] - center[0]) - sin(angle) * (p[1] - center[1]) + center[0],
- sin(angle) * (p[0] - center[0]) + cos(angle) * (p[1] - center[1])+ center[1]];
+ sin(angle) * (p[0] - center[0]) + cos(angle) * (p[1] - center[1])+ center[1]];
module switch_hole(position, notches=use_notched_holes) {
/* Cherry MX switch hole with the center at `position`. Sizes come
rotation_y_offset = 1.75 * column_spacing;
for (i=[0:$children-1]) {
rz(angle, [hand_separation, rotation_y_offset]) {
- child(i);
+ children(i);
}
}
}
for (i=[0:$children-1]) {
translate([0.5*hand_separation, /* we get back the full separation
because of mirroring */
- 0]) child(i);
+ 0]) children(i);
}
}
module right_screw_holes(hole_radius) {
/* coordinates of the back right screw hole before rotation... */
back_right = [(n_cols+n_thumb_keys)*row_spacing,
- staggering_offsets[n_cols-1] + n_rows * column_spacing];
+ staggering_offsets[n_cols-1] + n_rows * column_spacing];
/* and after */
tmp = rz_fun(back_right, angle, [0, 2.25*column_spacing]);
rotate_half() {
add_hand_separation() {
screw_hole(hole_radius, washer_radius,
- [row_spacing, 0],
- [-nudge, -nudge]);
+ [row_spacing, 0],
+ [-nudge, -nudge]);
screw_hole(hole_radius, washer_radius,
- [(n_cols+n_thumb_keys)*row_spacing, staggering_offsets[n_cols-1]],
- [nudge, -nudge]);
+ [(n_cols+n_thumb_keys)*row_spacing, staggering_offsets[n_cols-1]],
+ [nudge, -nudge]);
screw_hole(hole_radius, washer_radius,
- back_right,
- [nudge, nudge]);
+ back_right,
+ [nudge, nudge]);
}
}
/* add the screw hole near the cable hole */
- translate([cable_hole_width + washer_radius - tmp[0],
- back_screw_hole_offset]) {
+ translate([washer_radius - tmp[0] - 0.5*hand_separation,
+ back_screw_hole_offset]) {
rotate_half() {
add_hand_separation() {
screw_hole(hole_radius,
- washer_radius,
- back_right,
- [nudge, nudge]);
+ washer_radius,
+ back_right,
+ [nudge, nudge]);
}
}
}
right_half(switch_holes=false, key_size=switch_hole_size + 3);
left_half(switch_holes=false, key_size=switch_hole_size + 3);
}
+ /* add the USB cable hole: */
+ translate([-0.5*cable_hole_width, 2*column_spacing]) {
+ square([cable_hole_width, (2*n_rows) * column_spacing]);
+ }
}
screw_holes(washer_radius);
}
screw_holes(screw_hole_radius);
- /* add the USB cable hole: */
- translate([-0.5*cable_hole_width, 2*column_spacing]) {
- square([cable_hole_width, (2*n_rows) * column_spacing]);
+ }
+}
+
+module spacer_quadrant(spacer_quadrant_number) {
+ /* Cut a quarter of a spacer. */
+ translate([0, spacer_quartering_offset]) {
+ intersection() {
+ translate([0, -spacer_quartering_offset]) { spacer(); }
+ rotate([0, 0, spacer_quadrant_number * 90]) { square([1000, 1000]); }
}
}
}
+module quartered_spacer()
+{
+ /* Assemble all four quarters of a spacer. */
+ spacer_quadrant(0);
+ spacer_quadrant(1);
+ translate([-5,-10]) spacer_quadrant(2);
+ translate([5,-10]) spacer_quadrant(3);
+}
+
/* Create all four layers. */
top_plate();
-translate([300, 150]) { spacer(); }
translate([300, 0]) { switch_plate(); }
translate([0, 150]) { bottom_plate(); }
+translate([300, 150]) {
+ if (quarter_spacer == true) {
+ quartered_spacer();
+ }
+ else {
+ spacer();
+ }
+}