initial commit

backplate_numpad.scad

@@ -0,0 +1,82 @@
+// --- Parameters ---
+columns = 4;
+rows = 6;
+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;    
+
+// --- 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);
+
+// --- 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(is_vertical=false) {
+    dist = 23.85; // Standard 2u stabilizer distance
+    union() {
+        switch_cutout(); 
+        rotate([0, 0, is_vertical ? 90 : 0]) {
+            for(m = [-1, 1]) {
+                translate([m * dist/2, 0, 0]) {
+                    cube([3.3, 14.0, plate_thickness + 2], center=true); 
+                    translate([m * 0.5, 0, 0]) 
+                        cube([4.3, 8.0, 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]) {
+                        
+                        // 1. COLUMN 3:  (Enter, Plus, and 2 1U Keys)
+                        if (c == 3) {
+                            if (r == 0 || r == 2) {
+                                // Bottom 2 2U Vertical keys
+                                translate([0, u_size/2, 0]) stabilizer_cutout(true);
+                            } else if (r == 4 || r == 5) {
+                                // Top 2 1U keys
+                                switch_cutout();
+                            }
+                        }
+                        
+                        // 2. BOTTOM ROW: 2U '0' Key (Cols 0 and 1)
+                        else if (r == 0 && (c == 0 || c == 1)) {
+                            if (c == 0) translate([u_size/2, 0, 0]) stabilizer_cutout(false);
+                        }
+
+                        // 3. OTHER 1U KEYS
+                        else {
+                            switch_cutout();
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+// --- full render ---
+whole_plate();