mic-table-clamp.scad

   1 // -*- C -*-
   2
   3 // print on High Detail
   4 // but adjust infill to 50%, shell thickness to 2mm
   5
   6 include <threads.scad>
   7 include <camera-mount.scad>
   8
   9 positive_dia = inch * 3/8. - 0.375;
  10 positive_l = inch * 1/2.;
  11
  12 stem_l = 7;
  13 stem_dia = 12;
  14
  15 base_th = 3;
  16 base_dia = 60;
  17
  18 module Base(){
  19   translate([0,0,-0.1])
  20     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  21                    leadin=1, test=$test,
  22                    length= (positive_l + 0.1) / inch);
  23
  24   rotate([180,0,0]) {
  25     cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
  26              h = stem_l + 1,
  27              $fn=6);
  28     translate([0,0, stem_l])
  29       cylinder(r= base_dia/2, h= base_th);
  30   }
  31 }
  32
  33 thread_nom = 8;
  34 thread_act = thread_nom - 0.375;
  35
  36 wingnut_th = 5;
  37 wingnut_wall = 4;
  38 wingnut_wing_mindia = 17.0;
  39 wingnut_wing_xrad = 5; // xxx 8;
  40 wingnut_wing_xh = 5;
  41 wingnut_wing_th = 3;
  42
  43 //$test= true;
  44 $test= false;
  45
  46 $fa= 3;
  47 $fs= 0.2;
  48
  49 // calculated
  50
  51 wingnut_cnr = wingnut_wing_th/2 -0.1;
  52
  53 module Wingnut(){
  54   difference(){
  55     union(){
  56       cylinder(r= (thread_nom+wingnut_wall)/2,
  57                h= wingnut_th);
  58       linear_extrude(height= wingnut_wing_xh + wingnut_th)
  59         offset(r= wingnut_cnr)
  60         square([wingnut_wing_mindia + wingnut_wing_xrad*2 - wingnut_cnr*2,
  61                 wingnut_wing_th - wingnut_cnr*2],
  62                center=true);
  63     }
  64     translate([0,0, wingnut_th])
  65       linear_extrude(height= wingnut_wing_xh+1)
  66       square(wingnut_wing_mindia, center=true);
  67     translate([0,0, wingnut_th])
  68       rotate([180,0,0])
  69       translate([0,0,-0.01])
  70       metric_thread(diameter=thread_act, leadin=3, internal=true,
  71                     test=$test, length=wingnut_th+3);
  72   }
  73 }
  74
  75 Wingnut();