:
maximum_corner_rounding_radius;
+// the printed nubs did not fit into the extrusion gap perfectly.
+// we can change the model just a little bit to accomodate printing
+// imperfections.
fudge = 0.1;
//fudge = 0.0;
// 3030 dimensions
-x = 30; // adding a little because printers aren't perfect
-y = 30; // adding a little because printers aren't perfect
+x = 30;
+y = 30;
opening_width = 8;
outer_block = (30 - 16.5) / 2;
module round_corners(r) {
fillet(r) { fillet(-r) { children(); } } }
+module side_nub() {
+ // side nub, goes into side 3030 openings
+ a = opening_width;
+ b = foot_height + wall_width - (y - opening_width) / 2;
+ side_nub_length = (a < b) ? a : b;
+ translate([0, (y - opening_width) / 2 + fudge]) {
+ square([nub_depth, side_nub_length - fudge]); } }
+
+module bottom_nub() {
+ // bottom nub, goes into bottom 3030 opening
+ translate([(x - opening_width) / 2, 0]) {
+ square([opening_width / 2, nub_depth]); } }
+
module half_foot_2d() {
// outer ring
difference() {
translate([cos(45) * foot_height,
-(sin(45) * foot_height + wall_width)]) {
square([x / 2 - cos(45) * foot_height, wall_width]); }
- // bottom nub, goes into bottom 3030 opening
- translate([(x - opening_width) / 2, 0]) {
- square([opening_width / 2, nub_depth]); }
- // side nub, goes into side 3030 openings
- a = opening_width;
- b = foot_height + wall_width - (y - opening_width) / 2;
- side_nub_length = (a < b) ? a : b;
- translate([0, (y - opening_width) / 2 + fudge]) {
- square([nub_depth, side_nub_length - fudge]); } }
+ bottom_nub();
+ side_nub(); }
module foot_2d() {
round_corners(corner_rounding_radius) {