Add supports for the rails for printability

diff --git a/skeleton_cell.scad b/skeleton_cell.scad
index 23e8c043e244a29c95e4fca7c6b4f3ae795d5c32..521ff198931db0d5f943d2142a0f210e36bd4960 100644 (file)
--- a/skeleton_cell.scad
+++ b/skeleton_cell.scad
@@ -1,5 +1,7 @@
 fit_clearance = 0.1;
 
+support_thickness = 0.4;
+
 width = 50;
 height = 50;
 depth = 100;
@@ -42,26 +44,88 @@ module ring(width, depth, ring_thickness, ring_height)
                };
 }
 
-module rail(depth, thickness)
+module rail_bottom_left_base(thickness)
+{
+       union()
+       {
+               polygon([[0, 0], [0, thickness], [thickness, 0]]);
+               square([support_thickness, 3 * thickness]);
+               square([3 * thickness, support_thickness]);
+       }
+}
+
+module rail_bottom_left(length, thickness)
+{
+       linear_extrude(length)
+               rail_bottom_left_base(thickness);
+}
+
+module rail_top_left_base(thickness)
 {
-       linear_extrude(depth)
+       union()
+       {
                polygon([[0, 0], [0, thickness], [thickness, 0]]);
+               square([support_thickness, 3 * thickness]);
+               translate([0.5 * thickness, - support_thickness])
+                       square([2.5 * thickness, support_thickness]);
+       }
+}
+
+module rail_top_left(length, thickness)
+{
+       linear_extrude(length)
+               rail_top_left_base(thickness);
+}
+
+module rail_bottom_right(length, thickness)
+{
+       linear_extrude(length)
+               difference()
+               {
+                       union()
+                       {
+                               polygon([[0, 0], [0, thickness], [thickness, 0]]);
+                               translate([0, -2 * thickness])
+                                       square([support_thickness, 3 * thickness]);
+                               translate([-2 * thickness, 0])
+                                       square([2.5 * thickness, support_thickness]);
+                       }
+                       offset(r = fit_clearance)
+                               translate([thickness, thickness])
+                                       mirror([1, 1])
+                                               rail_bottom_left_base(thickness);
+               };
+}
+
+module rail_top_right(length, thickness)
+{
+       linear_extrude(length)
+               difference()
+               {
+                       polygon([[-2 * thickness, thickness], [0, thickness], [thickness, 0], [-2 * thickness, 0]]);
+                       offset(r = fit_clearance)
+                               translate([thickness, thickness])
+                                       mirror([1, 1])
+                                               rail_top_left_base(thickness);
+               }
 }
 
 module rails(dims, thickness, fit_clearance)
 {
+       rail_length = dims.z - thickness - fit_clearance;
+       rail_thickness = thickness;
        translate([dims.x / 2, dims.y / 2])
                mirror([1, 1, 0])
-               rail(dims.z - thickness - fit_clearance, thickness - fit_clearance);
+                       rail_bottom_left(rail_length, rail_thickness);
        translate([- (dims.x / 2 - thickness), - (dims.y / 2 - thickness)])
                mirror([1, 1, 0])
-               rail(dims.z - thickness - fit_clearance, thickness - fit_clearance);
+                       rail_top_right(rail_length, rail_thickness);
        translate([dims.x / 2, - dims.y / 2])
                mirror([1, 0, 0])
-               rail(dims.z - thickness - fit_clearance, thickness - fit_clearance);
+                       rail_top_left(rail_length, rail_thickness);
        translate([- (dims.x / 2 - thickness), dims.y / 2 - thickness])
                mirror([1, 0, 0])
-               rail(dims.z - thickness - fit_clearance, thickness - fit_clearance);
+                       rail_bottom_right(rail_length, rail_thickness);
 }
 
 module half_cage()