fs-i6-knob.scad

   1 infty = 100;
   2 eps = 0.01;
   3
   4 pin_d = 6.6;
   5 pin_d2 = 8.5;
   6 pin_h = 10;
   7
   8 out_d = 11;
   9 wall = 1;
  10
  11 slot_w = 0.6;
  12 slot_h = pin_h;
  13 slot_angle = 45;
  14
  15 difference() {
  16         union() {
  17                 cylinder(r = out_d/2, h = pin_h);
  18                 for (angle = [0:15:360]) rotate([0, 0, angle])
  19                         translate([out_d/2, 0, 0])
  20                                 cylinder(r = 0.9, $fn = 3, h = pin_h);
  21                 // +-90 degree protrusions
  22                 for (angle = [90,270]) rotate([0, 0, angle])
  23                         translate([out_d/2, 0, 0])
  24                         rotate([0, 0, 45])
  25                                 cylinder(r = 1.5, $fn = 4, h = pin_h);
  26                 // center protrusion
  27                 difference() {
  28                         translate([out_d/2, 0, 0])
  29                                 cylinder(r = 2.5, $fn = 3, h = pin_h);
  30                         translate([0, 0, 2*pin_h/3 - wall/2])
  31                                 cylinder(r = infty, h = wall);
  32                         translate([0, 0, pin_h/3 - wall/2])
  33                                 cylinder(r = infty, h = wall);
  34                 }
  35                 // bottom cylinder
  36                 cylinder(r = out_d/2 + 0.9, h = wall, $fn = 360/15);
  37                 // top cylinder
  38                 translate([0, 0, pin_h - wall])
  39                 cylinder(r = out_d/2 + 0.9, h = wall, $fn = 360/15);
  40         }
  41         difference() {
  42                 translate([0, 0, -eps])
  43                         cylinder(r = pin_d/2, h = infty, $fn = 32);
  44                 rotate([0, 0, slot_angle])
  45                 translate([-pin_d/2-eps, -slot_w/2, 0])
  46                         cube([pin_d+2*eps, slot_w, slot_h-eps]);
  47         }
  48 }
  49
  50
  51