belt-slot-cut-jig.scad

   1 // -*- C -*-
   2
   3 crewpunch_slop = 0.3;
   4
   5 holder_min_wall = 1;
   6 holder_front_wall = 5;
   7
   8 // from careful measurement
   9
  10 crewpunch_shape =
  11   [[  6, [0.6, 6.0], [1.6, 12.3] ],
  12    [  8, [1.1, 6.2], [1.9, 12.5] ],
  13    [ 10, [1.6, 6.5], [2.1, 12.8] ],
  14    [ 12, [1.8, 6.6], [2.3, 12.7] ],
  15    [ 14, [2.1, 6.8], [2.6, 13.0] ],
  16    [ 16, [2.4, 6.9], [2.7, 13.2] ]];
  17
  18 crewpunch_systematic_size_error = +0.36;
  19
  20 crewpunch_min_y = 4.7 - crewpunch_systematic_size_error;
  21
  22 // computed
  23
  24 crewpunch_smallest_shape = crewpunch_shape[0];
  25 crewpunch_biggest_shape = crewpunch_shape[len(crewpunch_shape)-1];
  26
  27 holder_block_zsz = crewpunch_biggest_shape[0] - crewpunch_smallest_shape[0];
  28 holder_xsz = crewpunch_biggest_shape[0][0] + crewpunch_biggest_shape[0][1] +
  29   holder_min_wall*2;
  30 holder_ysz = crewpunch_biggest_shape[1][0] + crewpunch_biggest_shape[1][1] +
  31   holder_min_wall + holder_front_wall;
  32
  33 // objects
  34
  35 module CrewPunch(){
  36   ourslop = crewpunch_slop - crewpunch_systematic_size_error;
  37   hull(){
  38     for(layer=crewpunch_shape){
  39       translate([0,0, layer[0]]){
  40         for(xind=[0,1]) //translate([xind?0:1,0,0])
  41           for(yind=[0,1]) //translate([0,yind?0.5:0,0])
  42             mirror([xind?1:0,0,0]) mirror([0,yind?0:1,0]){
  43               translate([-0.1,-0.1,-0.1])
  44                 cube([0.1 + layer[2][xind] + ourslop,
  45                       0.1 + layer[1][yind] + ourslop,
  46                       0.2]);
  47             }
  48       }
  49     }
  50   }
  51 }
  52
  53 module PunchHolder(){
  54   difference(){
  55     cube([holder_xsz, holder_ysz, holder_block_zsz]);
  56
  57   }
  58 }
  59
  60 //CrewPunch();
  61 PunchHolder();