mic-table-clamp.scad

   1 // -*- C -*-
   2
   3 // print on High Detail
   4 // but adjust 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 = 40;
  13 stem_dia = 12;
  14 stem_th = 3;
  15 stem_ceil = 2;
  16 stem_base_th  = 4;
  17 stem_base_dia = 25;
  18 stem_inner_l = 30;
  19
  20 thread_nom = 8;
  21 thread_pitch = 1.25;
  22 thread_act = thread_nom + 0.600;
  23
  24 wingnut_th = 5;
  25 wingnut_wall = 4;
  26 wingnut_wing_mindia = 17.0;
  27 wingnut_wing_xrad = 8;
  28 wingnut_wing_xh = 5;
  29 wingnut_wing_th = 3;
  30
  31 $test= true;
  32 ///$test= false;
  33
  34 //$fa= 3;
  35 //$fs= 0.2;
  36
  37 // calculated
  38
  39 wingnut_cnr = wingnut_wing_th/2 -0.1;
  40
  41 module OurThread(l){
  42   translate([0,0,-0.01])
  43     metric_thread(diameter=thread_act, pitch=thread_pitch,
  44                   leadin=3, internal=true,
  45                   test=$test, length=l);
  46 }
  47
  48 module Stem(){
  49   translate([0,0, stem_l -0.1])
  50     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  51                    leadin=1, test=$test,
  52                    length= (positive_l + 0.1) / inch);
  53
  54   difference(){
  55     union(){
  56       cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
  57                h = stem_l,
  58                $fn=6);
  59       cylinder(r= stem_base_dia/2,
  60                h = stem_base_th);
  61     }
  62     OurThread(stem_inner_l);
  63   }
  64 }
  65
  66 module Wingnut(){
  67   difference(){
  68     union(){
  69       cylinder(r= (thread_nom+wingnut_wall)/2,
  70                h= wingnut_th);
  71       minkowski(){
  72         sphere(r= wingnut_cnr);
  73         translate([0,0, wingnut_cnr*0.5])
  74           linear_extrude(height= wingnut_wing_xh + wingnut_th
  75                          - wingnut_cnr*1.5)
  76           square([wingnut_wing_mindia + wingnut_wing_xrad*2 - wingnut_cnr*2,
  77                   wingnut_wing_th - wingnut_cnr*2],
  78                  center=true);
  79       }
  80     }
  81     translate([0,0, wingnut_th])
  82       linear_extrude(height= wingnut_wing_xh+1)
  83       square(wingnut_wing_mindia, center=true);
  84     translate([0,0, wingnut_th])
  85       rotate([180,0,0])
  86       OurThread(wingnut_th+3);
  87     mirror([0,0,1])
  88       linear_extrude(height=5)
  89       square(center=true, wingnut_wing_mindia*2);
  90   }
  91 }
  92
  93 //Wingnut();
  94 Stem();