opening_width = 8;
inner_block = 12;
-major_block_corner_diameter = 4;
-major_block_corner_radius = major_block_corner_diameter / 2;
-
-corner_block_inner = (30 - 16.5) / 2;
+outer_block = (30 - 16.5) / 2;
wall = 2;
-$fn = 40;
-
-intersection(){
- minkowski() {
- square(x - major_block_corner_diameter, center=true);
- circle(major_block_corner_radius); }
-
- union(){
- arms = 4;
- for(arm = [0:arms - 1]) {
- rotate(arm * 360 / arms) {
- square(inner_block / 2);
- rotate(45) {
- translate([diagonal/2, 0]) {
- square([diagonal, wall], center=true); } }
- translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
- square([corner_block_inner, corner_block_inner]); }
- translate([opening_width / 2, y/2 - wall]) {
- square([(x - opening_width) / 2, wall]); }
- translate([x / 2 - wall, opening_width / 2]) {
- square([wall, (y - opening_width) / 2]); } } } } }
+$fn = 100;
+
+module arm_half(){
+ // inner block
+ square(inner_block / 2);
+
+ // diagonal arms connecting inner block to outer blocks
+ rotate(45) {
+ square([diagonal - wall, wall / 2]); }
+
+ // outer block, without the wall part since wall has rounded corner
+ translate([x / 2 - outer_block, y / 2 - outer_block]) {
+ square(outer_block - wall); }
+
+ // outer arms covering the opening
+ translate([(opening_width + wall) / 2, y / 2 - wall]) {
+ square([(x - opening_width - wall) / 2 - wall, wall]); }
+ // rounded part at entrace to inside
+ translate([(opening_width + wall) / 2, (y - wall) / 2]){
+ circle(d = wall); }
+ // rounded part around outside of extrusion
+ corner_squish = 0.1;
+ translate([x / 2 - wall + corner_squish, y / 2 - wall + corner_squish]) {
+ circle(wall - corner_squish); } }
+
+module 3030_profile(){
+ arms = 4;
+ for(arm = [0:arms - 1]) {
+ rotate(arm * 360 / arms) {
+ arm_half();
+ mirror(){ arm_half(); } } } }
+
+linear_extrude(height = 35){
+ difference(){
+ minkowski(){
+ square(30, true);
+ circle(5);}
+ minkowski(){
+ 3030_profile();
+ circle(0.2);} } }
+
/*
This file is part of 3d-printables.