challenge-bot.com Git - ozzloy@gmail.com/3d-printables/blob - mk2-haribo-spool-holder.scad

   1 /* GNU AGPLv3 (or later at your option)
   2    see bottom for more license info */
   3
   4 /* measurements from misumi's 3030 aluminum extrusion data sheet
   5    https://us.misumi-ec.com/pdf/fa/2012/p2_0545.pdf
   6 */
   7
   8 x = 30;
   9 y = 30;
  10 diagonal = sqrt(pow(30/2, 2) + pow(30/2, 2));
  11 opening_width = 8;
  12 inner_block = 12;
  13
  14 outer_block = (30 - 16.5) / 2;
  15 wall = 2;
  16
  17 $fn = 100;
  18
  19 module arm_half(){
  20   // inner block
  21   square(inner_block / 2);
  22
  23   // diagonal arms connecting inner block to outer blocks
  24   rotate(45) {
  25     square([diagonal - wall, wall / 2]); }
  26
  27   // outer block, without the wall part since wall has rounded corner
  28   translate([x / 2 - outer_block, y / 2 - outer_block]) {
  29     square(outer_block - wall); }
  30
  31   // outer arms covering the opening
  32   translate([(opening_width + wall) / 2, y / 2 - wall]) {
  33     square([(x - opening_width - wall) / 2 - wall, wall]); }
  34   // rounded part at entrace to inside
  35   translate([(opening_width + wall) / 2, (y - wall) / 2]){
  36     circle(d = wall); }
  37   // rounded part around outside of extrusion
  38   corner_squish = 0.1;
  39   translate([x / 2 - wall + corner_squish, y / 2 - wall + corner_squish]) {
  40     circle(wall - corner_squish); } }
  41
  42 module 3030_profile(){
  43   arms = 4;
  44   for(arm = [0:arms - 1]) {
  45     rotate(arm * 360 / arms) {
  46       arm_half();
  47       mirror(){ arm_half(); } } } }
  48
  49 linear_extrude(height = 35){
  50   difference(){
  51     minkowski(){
  52       square(30, true);
  53       circle(5);}
  54     minkowski(){
  55       3030_profile();
  56       circle(0.2);} } }
  57
  58
  59 /*
  60   This file is part of 3d-printables.
  61
  62   3d-printables is free software: you can redistribute it and/or modify
  63   it under the terms of the GNU Affero General Public License as published by
  64   the Free Software Foundation, either version 3 of the License, or
  65   (at your option) any later version.
  66
  67   3d-printables is distributed in the hope that it will be useful,
  68   but WITHOUT ANY WARRANTY; without even the implied warranty of
  69   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  70   GNU Affero General Public License for more details.
  71
  72   You should have received a copy of the GNU Affero General Public License
  73   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
  74 */