thread-external-test.scad

   1 // -*- C -*-
   2
   3 include <threads.scad>
   4 include <utils.scad>
   5
   6 // https://en.wikipedia.org/wiki/ISO_metric_screw_thread
   7
   8 // M6
   9 thread_nom = 6;
  10 thread_pitch = 1.00;
  11 thread_act = thread_nom - 0.300;
  12 head_size = 10;
  13
  14 thread_len = 12.5;
  15 base_th = 1.5;
  16
  17 $test = false;
  18
  19 // calculated
  20
  21 base_dia = head_size / cos(30);
  22
  23 module MachineScrew(){
  24   translate([0, 0, -0.1])
  25     render()
  26     metric_thread(diameter=thread_act, pitch=thread_pitch,
  27                   leadin=1, internal=false,
  28                   test=$test, length=thread_len + 0.1);
  29   linextr(-base_th, 0)
  30     circle(r= base_dia/2, $fn=6);
  31 }
  32
  33 MachineScrew();