spacebar ortholinear

spacebar_ortholinear.scad

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+// Parameters
+$fn = 64; 
+
+// Dimensions
+u_spacing = 19.05;
+
+// 7U: 1U base + 6 additionals U
+width_base = 18.2 + (6 * u_spacing); // 132.5mm
+width_top  = 14.5 + (6 * u_spacing); 
+
+depth_base = 18.2;             
+depth_top  = 14.5;             
+height = 9.0;
+corner_radius = 2.5;
+
+// Stem
+stem_h = 5.0;
+stem_outer_d = 5.5;
+cross_l = 4.1;
+cross_w1 = 1.25;
+cross_w2 = 1.15;
+
+// Stab spacing
+// 6.25U standard wire
+stab_spacing = 100; 
+
+module rounded_rectangle(w, d, h, r) {
+    hull() {
+        translate([r, r, 0]) cylinder(r=r, h=h);
+        translate([w - r, r, 0]) cylinder(r=r, h=h);
+        translate([r, d - r, 0]) cylinder(r=r, h=h);
+        translate([w - r, d - r, 0]) cylinder(r=r, h=h);
+    }
+}
+
+module xda_body() {
+    difference() {
+        hull() {
+            rounded_rectangle(width_base, depth_base, 0.1, corner_radius);
+            translate([(width_base - width_top)/2, (depth_base - depth_top)/2, height - 0.1])
+                rounded_rectangle(width_top, depth_top, 0.1, corner_radius);
+        }
+            
+        // Hollow out the inside
+        translate([0,0,-0.5]) 
+        hull() {
+            translate([1.5, 1.5, 0]) 
+                rounded_rectangle(width_base - 3, depth_base - 3, 0.1, corner_radius/2);
+            translate([(width_base - width_top)/2 + 1.5, (depth_base - depth_top)/2 + 1.5, height - 2.5])
+                rounded_rectangle(width_top - 3, depth_top - 3, 0.1, corner_radius/2);
+        }
+    }
+}
+
+module single_stem_unit() {
+    intersection() {
+        cylinder(d=stem_outer_d, h=height - 0.5); 
+        difference() {
+            cylinder(d=stem_outer_d, h=height); 
+            translate([0, 0, -0.1]) { 
+                cube([cross_l, cross_w1, stem_h * 2], center=true);
+                cube([cross_w2, cross_l, stem_h * 2], center=true);
+            }
+        }
+    }
+}
+
+module all_stems() {
+    // Main Center Stem
+    translate([width_base/2, depth_base/2, 0]) 
+        single_stem_unit();
+    
+    // Stabilizer Stems
+    translate([width_base/2 - stab_spacing/2, depth_base/2, 0]) 
+        single_stem_unit();
+    translate([width_base/2 + stab_spacing/2, depth_base/2, 0]) 
+        single_stem_unit();
+}
+
+// Render
+union() {
+    xda_body();
+    all_stems();
+}