mic-camera-adapter.scad

   1 // -*- C -*-
   2
   3 // print on High Detail
   4 // but adjust infill to 50%
   5
   6 include <threads.scad>
   7
   8 inch = 25.4;
   9
  10 positive_dia = inch * 3/8. - 0.25;
  11 positive_l = inch * 1/2.;
  12
  13 negative_dia = inch * 1/4. + 0.25;
  14 negative_l =   10.0;
  15
  16 negative_wall = 4;
  17 midsection = 4;
  18
  19 spanner = 12;
  20
  21 negative_tpi = 20;
  22 negative_pitch = inch/negative_tpi;
  23 negative_chamfer = negative_pitch/2;
  24
  25 //$test = true;
  26 $test = false;
  27 $fs=0.1;
  28 $fa=5;
  29
  30 module Adapter(){
  31   translate([0,0,-0.1])
  32     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  33                    leadin=1, test=$test,
  34                    length= (positive_l + 0.1) / inch);
  35   rotate([180,0,0]) {
  36     difference(){
  37       cylinder(r= spanner/2 * 1/(0.5 * sqrt(3)),
  38                h = negative_l + midsection,
  39                $fn=6);
  40       translate([0,0, midsection])
  41         english_thread(diameter=negative_dia/inch,
  42                        threads_per_inch=negative_tpi,
  43                        leadin=0, internal=true, test=$test,
  44                        length= (negative_l + inch/19) / inch);
  45       translate([0,0, midsection+negative_l]) {
  46         hull(){
  47           translate([0,0, negative_chamfer])
  48             cylinder(r= negative_dia/2 + negative_chamfer*2,
  49                      h=1);
  50           mirror([0,0,1])
  51             cylinder(r= negative_dia/2 - negative_chamfer*2,
  52                      h= negative_chamfer*3);
  53         }
  54       }
  55     }
  56   }
  57 }
  58
  59 Adapter();