vanilla

Makefile

+all:
+	openscad -o out/tile.stl -D 'show_basic_tile=true;' tile.scad

README.md

+
+Project of universal mount system based on single tile.

tile.scad

+
+tile_a = 36;
+tile_screw_y = 8;
+tile_screw_x = 13;
+tile_screw_d = 3;
+tile_nut_d = 6;
+tile_nut_h = 3;
+tile_t = 2;
+tile_corner = 6;
+show_basic_tile = false;
+
+module tile_base_shape(l) {
+    hull() {
+        square([ l - tile_corner * 2, l ], center = true);
+        square([ l, l - tile_corner * 2 ], center = true);
+    }
+}
+
+module tile_relief() {
+    for (m = [ 0, 1 ]) mirror([ m, 0, 0 ]) tile_screw_pos() {
+            rotate([ 0, 0, 30 ]) circle(d = tile_nut_d + tile_t * 2, $fn = 6);
+        }
+    difference() {
+        tile_base_shape(tile_a);
+        tile_base_shape(tile_a - tile_t * 2);
+    }
+}
+
+module tile_screw_pos() {
+    for (alpha = [0:90:360])
+        rotate([ 0, 0, alpha ]) translate([ tile_screw_x, tile_screw_y, 0 ])
+            children();
+}
+
+module tile_screw_hole(h) {
+    cylinder(d = tile_screw_d, h = h + 2, center = true);
+
+    rotate([ 0, 0, 30 ]) translate([ 0, 0, tile_t ])
+        cylinder(d = tile_nut_d, h = h, center = true, $fn = 6);
+}
+
+module tile_tube_hole(tube_d) {
+    rotate([ 90, 0, 0 ]) cylinder(d = tube_d, h = 100, center = true);
+}
+
+module tile_base(h, tube_d) difference() {
+    union() {
+        linear_extrude(height = h, center = true, convexity = 10) tile_relief();
+    }
+    for (alpha = [ 0, 180 ])
+        rotate([ alpha, 0, 0 ]) tile_screw_pos() tile_screw_hole(h);
+
+    if (tube_d != 0) tile_tube_hole(tube_d);
+}
+
+module basic_tile() {
+    tube_d = 5;
+    h = tube_d + tile_t * 2;
+    tile_base(h, tube_d);
+}
+
+if (show_basic_tile) basic_tile();