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_h = 2.5;
  31 clamp_bot_tooth_d  = 10;
  32 clamp_bot_collar = 20;
  33 clamp_bot_collar_th = 3.0;
  34 clamp_reg_sz1 = 3;
  35 clamp_reg_sz2 = 5;
  36 clamp_w = 15;
  37 clamp_max_table_th = 35;
  38
  39 clamp_hole_dia = thread_nom + 0.30;
  40
  41 clamp_reg_clear_x = 6;
  42 clamp_reg_clear_y = 0.75; // each side
  43 clamp_reg_extra_x = 4;
  44
  45 //ct_h = 7;
  46
  47 wingnut_th = 5;
  48 wingnut_wall = 4;
  49 wingnut_wing_mindia = 17.0;
  50 wingnut_wing_xrad = 8;
  51 wingnut_wing_xh = 5;
  52 wingnut_wing_th = 3;
  53
  54 $test= true;
  55 ///$test= false;
  56
  57 //$fa= 3;
  58 //$fs= 0.2;
  59
  60 // calculated
  61
  62 wingnut_cnr = wingnut_wing_th/2 -0.1;
  63
  64 clamp_reg_bot_x_min = stem_base_dia/2 + clamp_reg_clear_x - clamp_reg_sz2;
  65
  66 module OurThread(l){
  67   translate([0,0,-0.01])
  68     metric_thread(diameter=thread_act, pitch=thread_pitch,
  69                   leadin=3, internal=true,
  70                   test=$test, length=l);
  71 }
  72
  73 module Stem(){ ////toplevel
  74   translate([0,0, stem_l -0.1])
  75     english_thread(diameter=positive_dia/inch, threads_per_inch=16,
  76                    leadin=1, test=$test,
  77                    length= (positive_l + 0.1) / inch);
  78
  79   difference(){
  80     union(){
  81       cylinder(r= stem_dia/2 * 1/(0.5 * sqrt(3)),
  82                h = stem_l,
  83                $fn=6);
  84       cylinder(r= stem_base_dia/2,
  85                h = stem_base_th);
  86     }
  87     OurThread(stem_inner_l);
  88   }
  89 }
  90
  91 module Wingnut(){ ////toplevel
  92   difference(){
  93     union(){
  94       cylinder(r= (thread_nom+wingnut_wall)/2,
  95                h= wingnut_th);
  96       minkowski(){
  97         sphere(r= wingnut_cnr);
  98         translate([0,0, wingnut_cnr*0.5])
  99           linear_extrude(height= wingnut_wing_xh + wingnut_th
 100                          - wingnut_cnr*1.5)
 101           square([wingnut_wing_mindia + wingnut_wing_xrad*2 - wingnut_cnr*2,
 102                   wingnut_wing_th - wingnut_cnr*2],
 103                  center=true);
 104       }
 105     }
 106     translate([0,0, wingnut_th])
 107       linear_extrude(height= wingnut_wing_xh+1)
 108       square(wingnut_wing_mindia, center=true);
 109     translate([0,0, wingnut_th])
 110       rotate([180,0,0])
 111       OurThread(wingnut_th+3);
 112     mirror([0,0,1])
 113       linear_extrude(height=5)
 114       square(center=true, wingnut_wing_mindia*2);
 115   }
 116 }
 117
 118 module ClampCollarPlan(){
 119   circle(r= thread_nom/2 + clamp_bot_collar_th);
 120 }
 121 module ClampHolePlan(){
 122   circle(r= clamp_hole_dia/2);
 123 }
 124 module ClampArmPlan(){
 125   rectfromto([0,       -clamp_w/2],
 126              [clamp_l, +clamp_w/2]);
 127 }
 128
 129 module ClampTop(){ ////toplevel
 130   linear_extrude(height = clamp_top_th, convexity=4) {
 131     difference(){
 132       union(){
 133         ClampArmPlan();
 134         ClampCollarPlan();
 135       }
 136       ClampHolePlan();
 137     }
 138   }
 139   linear_extrude(height = clamp_reg_sz1, convexity=4) {
 140     difference(){
 141       for (m=[0,1]){
 142         mirror([0,m,0])
 143           translate([0, clamp_reg_sz2/2 + clamp_reg_clear_y, 0])
 144           rectfromto([-clamp_reg_bot_x_min - clamp_reg_extra_x, 0 ],
 145                      [0,                            clamp_reg_sz1 ]);
 146       }
 147       ClampHolePlan();
 148     }
 149   }
 150 }
 151
 152 module ClampBot(){ ////toplevel
 153   linear_extrude(height = clamp_bot_th, convexity=4) {
 154     difference(){
 155       ClampArmPlan();
 156       ClampHolePlan();
 157     }
 158   }
 159   translate([clamp_l, 0, clamp_bot_th-0.1])
 160     linear_extrude(height = clamp_bot_tooth_h +0.1)
 161     rectfromto([ -clamp_bot_tooth_d, -clamp_w/2 ],
 162                [  0,                 +clamp_w/2 ]);
 163   translate([0,0, clamp_bot_th])
 164     mirror([0,0,1])
 165     linear_extrude(height = clamp_bot_collar)
 166     difference(){
 167     ClampCollarPlan();
 168     ClampHolePlan();
 169   }
 170   translate([0, 0, clamp_bot_th]) {
 171     linextr(-clamp_reg_sz2, clamp_max_table_th+clamp_reg_sz2) {
 172       translate([-clamp_reg_bot_x_min, 0]) {
 173         rectfromto([ 0,             -clamp_reg_sz2/2 ],
 174                    [ clamp_reg_sz2, +clamp_reg_sz2/2 ]);
 175       }
 176     }
 177     linextr(-clamp_reg_sz2, 0) {
 178       difference(){
 179         rectfromto([ -clamp_reg_bot_x_min, -clamp_reg_sz2/2 ],
 180                    [  0,                   +clamp_reg_sz2/2 ]);
 181         ClampHolePlan();
 182       }
 183     }
 184   }
 185 }
 186
 187 module Demo(){ ////toplevel
 188   color("blue") translate([0,0, clamp_top_th+0.5]) Stem();
 189   color("red") ClampTop();
 190   color("grey") translate([0,0, -(clamp_bot_th + 5)]) ClampBot();
 191   translate([0,0, -(clamp_bot_collar +10)])
 192     rotate([180,0,0]) Wingnut();
 193 }
 194
 195 //Wingnut();
 196 //Stem();