mic-camera-adapter.scad

   1 // -*- C -*-
   2
   3 include <threads.scad>
   4
   5 inch = 25.4;
   6
   7 positive_dia = inch * 3/8. + 0.25;
   8 positive_l = inch * 1/2.;
   9
  10 negative_dia = inch * 1/4. + 0.25;
  11 negative_l =   10.0;
  12
  13 negative_wall = 4;
  14 midsection = 4;
  15
  16 spanner = 12;
  17
  18 negative_tpi = 20;
  19 negative_pitch = inch/negative_tpi;
  20 negative_chamfer = negative_pitch/2;
  21
  22 //$test = true;
  23 $test = false;
  24 $fs=0.1;
  25 $fa=5;
  26
  27 module Adapter(){
  28   translate([0,0,-0.1])
  29     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  30                    leadin=1, test=$test,
  31                    length= (positive_l + 0.1) / inch);
  32   rotate([180,0,0]) {
  33     difference(){
  34       cylinder(r= spanner/2 * 1/(0.5 * sqrt(3)),
  35                h = negative_l + midsection,
  36                $fn=6);
  37       translate([0,0, midsection])
  38         english_thread(diameter=negative_dia/inch,
  39                        threads_per_inch=negative_tpi,
  40                        leadin=0, internal=true, test=$test,
  41                        length= (negative_l + inch/19) / inch);
  42       translate([0,0, midsection+negative_l]) {
  43         hull(){
  44           translate([0,0, negative_chamfer])
  45             cylinder(r= negative_dia/2 + negative_chamfer*2,
  46                      h=1);
  47           mirror([0,0,1])
  48             cylinder(r= negative_dia/2 - negative_chamfer*2,
  49                      h= negative_chamfer*3);
  50         }
  51       }
  52     }
  53   }
  54 }
  55
  56 Adapter();