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backplate

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Sam Hadow
2026-03-24 18:51:06 +01:00
parent b278425204
commit 448ee99a44
2 changed files with 171 additions and 56 deletions
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backplate.scad
+71 -56
View File
@@ -1,29 +1,53 @@
// --- Toggle which part to render --- render_part = "full"; // "full", "left", or "right"
render_part = "full";
// --- Parameters --- // Parameters:
columns = 14;
rows = 5;
u_size = 19.05; u_size = 19.05;
plate_thickness = 1.5;
margin = 5.0;
// Switches and stabilizers
switch_outer_width = 14.2; switch_outer_width = 14.2;
switch_inner_width = 13.2; switch_inner_width = 13.2;
switch_total_height = 14.2; switch_total_height = 14.2;
notch_height = 4.0; notch_height = 4.0;
plate_thickness = 1.5;
margin = 5.0;
// Stabilizer
stab_w = 6.9; stab_w = 6.9;
stab_h = 11.2; stab_h = 13.5;
// --- Calculated Plate Dimensions --- // ANSI 60% Layout
plate_width = (columns - 1) * u_size + switch_outer_width + (margin * 2); layout = [
plate_height = (rows - 1) * u_size + switch_total_height + (margin * 2); [[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[2,1,2]],
split_point = plate_width / 2; [[1.5,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1.5,0,0]],
[[1.75,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[2.25,1,2]],
[[2.25,1,2],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[1,0,0],[2.75,1,2]],
[[1.25,0,0],[1.25,0,0],[1.25,0,0],[6.25,1,6.25],[1.25,0,0],[1.25,0,0],[1.25,0,0],[1.25,0,0]]
];
plate_width = (15 * u_size) + (margin * 2);
plate_height = (5 * u_size) + (margin * 2);
module split_mask() {
x1 = 7.0; // Top row
x2 = 7.5; // Row 2
x3 = 7.75; // Row 3
x4 = 6.25; // Row 4 down to bottom
linear_extrude(height = plate_thickness + 5, center = true) {
polygon(points = [
[0, plate_height + 1],
[margin + x1 * u_size, plate_height + 1],
[margin + x1 * u_size, margin + 4 * u_size],
[margin + x2 * u_size, margin + 4 * u_size],
[margin + x2 * u_size, margin + 3 * u_size],
[margin + x3 * u_size, margin + 3 * u_size],
[margin + x3 * u_size, margin + 2 * u_size],
[margin + x4 * u_size, margin + 2 * u_size],
[margin + x4 * u_size, -1],
[0, -1]
]);
}
}
// --- Modules ---
module switch_cutout() { module switch_cutout() {
union() { union() {
cube([switch_inner_width, switch_total_height, plate_thickness + 2], center=true); cube([switch_inner_width, switch_total_height, plate_thickness + 2], center=true);
@@ -35,66 +59,57 @@ module switch_cutout() {
} }
module stabilizer_cutout(wire_len_u) { module stabilizer_cutout(wire_len_u) {
dist = (wire_len_u == 6.25) ? 100 : 23.85; dist = (wire_len_u >= 6) ? 100 : 23.85;
union() { union() {
switch_cutout(); switch_cutout();
for(m = [-1, 1]) { for(m = [-1, 1]) {
translate([m * dist/2, 0, 0]) translate([m * dist/2, 0, 0])
cube([stab_w, stab_h, plate_thickness + 2], center=true); cube([stab_w, stab_h, plate_thickness + 2], center=true);
} }
} }
} }
module generate_row_cutouts(row_list, current_x_u, y_pos, index = 0) {
if (index < len(row_list)) {
key = row_list[index];
w = key[0];
has_stab = key[1];
stab_size = key[2];
center_x = (current_x_u * u_size) + (w * u_size / 2);
translate([center_x, y_pos, 0]) {
if (has_stab == 1) stabilizer_cutout(stab_size);
else switch_cutout();
}
generate_row_cutouts(row_list, current_x_u + w, y_pos, index + 1);
}
}
module whole_plate() { module whole_plate() {
difference() { difference() {
cube([plate_width, plate_height, plate_thickness]); cube([plate_width, plate_height, plate_thickness]);
translate([margin, margin, plate_thickness/2]) {
translate([margin + switch_outer_width/2, margin + switch_total_height/2, plate_thickness/2]) { for (r = [0 : len(layout) - 1]) {
for (r = [0 : rows - 1]) { let (row_data = layout[r], y_pos = (len(layout) - 1 - r) * u_size + (u_size/2)) {
for (c = [0 : columns - 1]) { generate_row_cutouts(row_data, 0, y_pos);
translate([c * u_size, r * u_size, 0]) {
// --- ROW 0: BOTTOM ROW ---
if (r == 0) {
if (c < 3) {
switch_cutout();
}
else if (c == 3) {
translate([u_size * 3, 0, 0]) stabilizer_cutout(6.25);
}
else if (c >= 10) {
switch_cutout();
}
}
// --- ROW 2: THIRD ROW (ENTER) ---
else if (r == 2) {
if (c < 12) {
switch_cutout();
} else if (c == 12) {
translate([u_size * 0.5, 0, 0]) stabilizer_cutout(2);
}
}
// --- ALL OTHER ROWS ---
else {
switch_cutout();
}
}
} }
} }
} }
} }
} }
// --- Render --- // Render
if (render_part == "left") { if (render_part == "left") {
intersection() { whole_plate(); cube([split_point, plate_height, plate_thickness + 2]); } intersection() {
} else if (render_part == "right") {
translate([-split_point, 0, 0]) intersection() {
whole_plate(); whole_plate();
translate([split_point, 0, -1]) cube([split_point, plate_height, plate_thickness + 2]); translate([0,0,plate_thickness/2]) split_mask();
}
} else if (render_part == "right") {
translate([-(margin + 4 * u_size), 0, 0])
difference() {
whole_plate();
translate([0,0,plate_thickness/2]) split_mask();
} }
} else { } else {
whole_plate(); whole_plate();
%translate([0,0,plate_thickness/2]) split_mask();
} }
backplate_ortholinear.scad
+100
View File
@@ -0,0 +1,100 @@
// --- Toggle which part to render ---
render_part = "full";
// --- Parameters ---
columns = 14;
rows = 5;
u_size = 19.05;
switch_outer_width = 14.2;
switch_inner_width = 13.2;
switch_total_height = 14.2;
notch_height = 4.0;
plate_thickness = 1.5;
margin = 5.0;
// Stabilizer
stab_w = 6.9;
stab_h = 11.2;
// --- Calculated Plate Dimensions ---
plate_width = (columns - 1) * u_size + switch_outer_width + (margin * 2);
plate_height = (rows - 1) * u_size + switch_total_height + (margin * 2);
split_point = plate_width / 2;
// --- Modules ---
module switch_cutout() {
union() {
cube([switch_inner_width, switch_total_height, plate_thickness + 2], center=true);
translate([0, (switch_total_height - (switch_total_height-notch_height)/2)/2, 0])
cube([switch_outer_width, (switch_total_height-notch_height)/2, plate_thickness + 2], center=true);
translate([0, -(switch_total_height - (switch_total_height-notch_height)/2)/2, 0])
cube([switch_outer_width, (switch_total_height-notch_height)/2, plate_thickness + 2], center=true);
}
}
module stabilizer_cutout(wire_len_u) {
dist = (wire_len_u == 6.25) ? 100 : 23.85;
union() {
switch_cutout();
for(m = [-1, 1]) {
translate([m * dist/2, 0, 0])
cube([stab_w, stab_h, plate_thickness + 2], center=true);
}
}
}
module whole_plate() {
difference() {
cube([plate_width, plate_height, plate_thickness]);
translate([margin + switch_outer_width/2, margin + switch_total_height/2, plate_thickness/2]) {
for (r = [0 : rows - 1]) {
for (c = [0 : columns - 1]) {
translate([c * u_size, r * u_size, 0]) {
// --- ROW 0: BOTTOM ROW ---
if (r == 0) {
if (c < 3) {
switch_cutout();
}
else if (c == 3) {
translate([u_size * 3, 0, 0]) stabilizer_cutout(6.25);
}
else if (c >= 10) {
switch_cutout();
}
}
// --- ROW 2: THIRD ROW (ENTER) ---
else if (r == 2) {
if (c < 12) {
switch_cutout();
} else if (c == 12) {
translate([u_size * 0.5, 0, 0]) stabilizer_cutout(2);
}
}
// --- ALL OTHER ROWS ---
else {
switch_cutout();
}
}
}
}
}
}
}
// --- Render ---
if (render_part == "left") {
intersection() { whole_plate(); cube([split_point, plate_height, plate_thickness + 2]); }
} else if (render_part == "right") {
translate([-split_point, 0, 0]) intersection() {
whole_plate();
translate([split_point, 0, -1]) cube([split_point, plate_height, plate_thickness + 2]);
}
} else {
whole_plate();
}