mic-table-clamp.scad

   1 // -*- C -*-
   2
   3 // print Stem and Wingnut on High Detail
   4 // but adjust shell thickness to 2mm
   5
   6 // others on Standard
   7
   8 include <utils.scad>
   9 include <threads.scad>
  10 include <camera-mount.scad>
  11
  12 positive_dia = inch * 3/8. - 0.375;
  13 positive_l = inch * 1/2.;
  14
  15 stem_l = 40;
  16 stem_dia = 12;
  17 stem_th = 3;
  18 stem_ceil = 2;
  19 stem_base_th  = 4;
  20 stem_base_dia = 25;
  21 stem_inner_l = 30;
  22
  23 thread_nom = 8;
  24 thread_pitch = 1.25;
  25 thread_act = thread_nom + 0.600;
  26
  27 clamp_l = 40;
  28 clamp_top_th = 7;
  29 clamp_bot_th = 10;
  30 clamp_bot_tooth = 2.5;
  31 clamp_bot_collar = 20;
  32 clamp_bot_collar_th = 4.0;
  33 clamp_reg_sz = 3;
  34 clamp_w = 15;
  35
  36 clamp_hole_dia = thread_nom + 0.30;
  37
  38 clamp_reg_clear_x = 2.5;
  39 clamp_reg_clear_y = 0.75; // each side
  40 clamp_reg_extra_x = 4;
  41
  42 //ct_h = 7;
  43
  44 wingnut_th = 5;
  45 wingnut_wall = 4;
  46 wingnut_wing_mindia = 17.0;
  47 wingnut_wing_xrad = 8;
  48 wingnut_wing_xh = 5;
  49 wingnut_wing_th = 3;
  50
  51 $test= true;
  52 ///$test= false;
  53
  54 //$fa= 3;
  55 //$fs= 0.2;
  56
  57 // calculated
  58
  59 wingnut_cnr = wingnut_wing_th/2 -0.1;
  60
  61 clamp_reg_bot_x_min = stem_base_dia/2 + clamp_reg_clear_x - clamp_reg_sz;
  62
  63 module OurThread(l){
  64   translate([0,0,-0.01])
  65     metric_thread(diameter=thread_act, pitch=thread_pitch,
  66                   leadin=3, internal=true,
  67                   test=$test, length=l);
  68 }
  69
  70 module Stem(){ ////toplevel
  71   translate([0,0, stem_l -0.1])
  72     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  73                    leadin=1, test=$test,
  74                    length= (positive_l + 0.1) / inch);
  75
  76   difference(){
  77     union(){
  78       cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
  79                h = stem_l,
  80                $fn=6);
  81       cylinder(r= stem_base_dia/2,
  82                h = stem_base_th);
  83     }
  84     OurThread(stem_inner_l);
  85   }
  86 }
  87
  88 module Wingnut(){ ////toplevel
  89   difference(){
  90     union(){
  91       cylinder(r= (thread_nom+wingnut_wall)/2,
  92                h= wingnut_th);
  93       minkowski(){
  94         sphere(r= wingnut_cnr);
  95         translate([0,0, wingnut_cnr*0.5])
  96           linear_extrude(height= wingnut_wing_xh + wingnut_th
  97                          - wingnut_cnr*1.5)
  98           square([wingnut_wing_mindia + wingnut_wing_xrad*2 - wingnut_cnr*2,
  99                   wingnut_wing_th - wingnut_cnr*2],
 100                  center=true);
 101       }
 102     }
 103     translate([0,0, wingnut_th])
 104       linear_extrude(height= wingnut_wing_xh+1)
 105       square(wingnut_wing_mindia, center=true);
 106     translate([0,0, wingnut_th])
 107       rotate([180,0,0])
 108       OurThread(wingnut_th+3);
 109     mirror([0,0,1])
 110       linear_extrude(height=5)
 111       square(center=true, wingnut_wing_mindia*2);
 112   }
 113 }
 114
 115 module ClampCollarPlan(){
 116   circle(r= thread_nom/2 + clamp_bot_collar_th);
 117 }
 118 module ClampHolePlan(){
 119   circle(r= clamp_hole_dia/2);
 120 }
 121 module ClampArmPlan(){
 122   rectfromto([0,       -clamp_w/2],
 123              [clamp_l, +clamp_w/2]);
 124 }
 125
 126 module ClampTop(){ ////toplevel
 127   linear_extrude(height = clamp_top_th, convexity=4) {
 128     difference(){
 129       union(){
 130         ClampArmPlan();
 131         ClampCollarPlan();
 132       }
 133       ClampHolePlan();
 134     }
 135   }
 136   linear_extrude(height = clamp_reg_sz, convexity=4) {
 137     difference(){
 138       for (m=[0,1]){
 139         mirror([0,m,0])
 140           translate([0, clamp_reg_sz/2 + clamp_reg_clear_y, 0])
 141           rectfromto([-clamp_reg_bot_x_min - clamp_reg_extra_x, 0 ],
 142                      [0,                             clamp_reg_sz ]);
 143       }
 144       ClampHolePlan();
 145     }
 146   }
 147 }
 148
 149 //Wingnut();
 150 //Stem();