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 3030_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       3030_arm_half();
  47       mirror(){ 3030_arm_half(); } } } }
  48
  49 module 3030_sleeve_profile(){
  50   difference() {
  51     square(40, true);
  52     minkowski() {
  53       3030_profile();
  54       circle(0.2);} } }
  55
  56 module fillet(r) {
  57    offset(-r) {
  58      offset(r) {
  59        children(); } } }
  60
  61 module upper_arm_profile(){
  62   square(40, true);
  63
  64   a = [20, -20];
  65   b = [34.1, 0];
  66   c = [6.25, 20];
  67   points = [a, b, c];
  68
  69   arm_radius = 11.35;
  70   arm_center = [61.8, 140.4];
  71   hull() {
  72     polygon(points);
  73     translate(arm_center) {
  74       circle(arm_radius); } } }
  75
  76 module forearm_profile() {
  77   fillet(-5) {
  78     difference() {
  79       upper_arm_profile();
  80       translate([-20, -20]) {
  81         square(151); } } } }
  82
  83 module upper_arm_hull() {
  84   linear_extrude(height = 15) {
  85     upper_arm_profile(); } }
  86
  87 module forearm_hull() {
  88   linear_extrude(height = 120.5) {
  89     forearm_profile(); } }
  90
  91 module shoulder_hull() {
  92   translate([-20, -20, 0]) {
  93     cube([40, 40, 35]); } }
  94
  95 shoulder_hull();
  96 upper_arm_hull();
  97 forearm_hull();
  98
  99 original_spool_holder();
 100
 101 module original_forearm_profile() {
 102   %projection(true) {
 103     translate([-315, 0, -80]) {
 104       import("Spool-holder.stl"); } } }
 105
 106 module original_upper_arm_profile() {
 107   %projection(true) {
 108     translate([-315, 0, -2]) {
 109       import("Spool-holder.stl"); } } }
 110
 111 module original_spool_holder() {
 112   %translate([-315, 0, 0]) {
 113     import("Spool-holder.stl"); } }
 114
 115 /*
 116   This file is part of 3d-printables.
 117
 118   3d-printables is free software: you can redistribute it and/or modify
 119   it under the terms of the GNU Affero General Public License as published by
 120   the Free Software Foundation, either version 3 of the License, or
 121   (at your option) any later version.
 122
 123   3d-printables is distributed in the hope that it will be useful,
 124   but WITHOUT ANY WARRANTY; without even the implied warranty of
 125   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 126   GNU Affero General Public License for more details.
 127
 128   You should have received a copy of the GNU Affero General Public License
 129   along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
 130 */