i3-spool-holder.scad

   1 eps = 0.01;
   2 infty = 300;
   3
   4 spool_r = 100 + 30;
   5 frame_w = 6.5 + 0.5;
   6 frame_h = 40 + 0.5;
   7
   8 bearing_d = 15.5;
   9 bearing_h = 9 + 1;
  10 bearing_side_off = 3;
  11
  12 holder_w = 5;
  13 wall = 2;
  14
  15 stem_w = 10;
  16 fork_w = frame_w + 2*6;
  17 fork_h = frame_h/3;
  18 fork_top = 5;
  19 fork_bottom = 3;
  20 fork_raised = holder_w + 5;
  21
  22 fork_angle = 20;
  23
  24 module holder() {
  25         cylinder(r2 = bearing_d/2 + wall, r1 = bearing_d/2, h = holder_w + bearing_side_off);
  26         for (angle = [0:360/5:360])
  27                 rotate([0, 0, angle]) hull() {
  28                         cylinder(r = wall, h = holder_w + bearing_h);
  29                         translate([bearing_d/2 - wall/2, 0, 0])
  30                                 cylinder(r = wall/2, h = holder_w + bearing_side_off+ bearing_h);
  31                 }
  32
  33         difference() {
  34                 union() {
  35                         hull() {
  36                                 // stem
  37                                 translate([0, -stem_w/2, 0])
  38                                         cube([spool_r, stem_w, holder_w]);
  39
  40                                 // fork
  41                                 translate([spool_r, 0, 0])
  42                                 rotate([0, 0, fork_angle])
  43                                 translate([-fork_top, -fork_w/2, 0])
  44                                         cube([fork_top + fork_h, fork_w, holder_w]);
  45                         }
  46                         // fork side
  47                         translate([spool_r, 0, 0])
  48                         rotate([0, 0, fork_angle])
  49                         translate([0, frame_w/2, 0])
  50                                 cube([frame_h + wall, fork_w/2-frame_w/2, holder_w]);
  51                         // raised clip
  52                         translate([spool_r, 0, 0])
  53                         rotate([0, 0, fork_angle])
  54                         translate([-wall, -frame_w/2-wall, 0])
  55                                 cube([frame_h + 2*wall, frame_w+2*wall, fork_raised]);
  56                 }
  57                 translate([spool_r, 0, 0])
  58                 rotate([0, 0, fork_angle]) {
  59                         // frame
  60                         translate([0, -frame_w/2, -infty/2])
  61                                 cube([frame_h, frame_w, infty]);
  62                         // frame hole
  63                         translate([fork_h, -frame_w/2-wall-eps, -infty/2])
  64                                 cube([frame_h, frame_w+wall+2*eps-fork_bottom, infty]);
  65                 }
  66         }
  67 }
  68
  69 for (y = [-1, 1]) {
  70         scale([1, y, 1])
  71         translate([0, 12, 0])
  72         holder();
  73 }
  74