osstest-arm-net-bracket.scad

   1 // -*- C -*-
   2
   3 holedist = 64;
   4 tonguewidth = 10;
   5 tongue2width = 15;
   6 totaldepth = 26;
   7 tongue2depth = 35;
   8 thick = 4;
   9 tabover = 7+6;
  10 tabunder = 15;
  11
  12 tabsidel = 7;
  13 tabsider = 7+10;
  14
  15 tonguethick = 4;
  16 tongue2thick = 5;
  17 strapthick = 2;
  18 strapwidth = 5;
  19 ridgewidth = 2;
  20
  21 hstrengthick = 2.5;
  22 hstrengdepth = strapwidth;
  23
  24 cutoutover = 7;
  25 rcutoutside = 7+2 - 0.5;
  26 lcutoutside = 7-6.5 - 0.5;
  27
  28 holedia = 3.5;
  29
  30 tongue2x = tongue2width - holedist;
  31
  32 module Tongue(tw,tt,ad,slots=2){
  33   y0=thick+0.1;
  34   yn=ad-ridgewidth-strapwidth;
  35   difference(){
  36     translate([-tw, 0, 0])
  37       cube([tw, ad, tt+strapthick]);
  38     for (yi=[1:slots-1])
  39       translate([-tw-1, y0 + (yn-y0)*yi/(slots-1), tt])
  40         cube([tw+2, strapwidth, strapthick+0.05]);
  41   }
  42 }
  43
  44 module Object(){
  45   difference(){
  46     translate([-holedist-tabsider, 0, 0]) {
  47       cube([tabsidel+tabsider+holedist, thick, tabunder+tabover]);
  48       cube([tabsidel+tabsider+holedist, thick+hstrengdepth, hstrengthick]);
  49     }
  50     translate([0,-25,tabunder+cutoutover]) {
  51       translate([-(holedist+rcutoutside), 0,0])
  52         mirror([1,0,0])
  53         cube([50,50,50]);
  54       translate([lcutoutside, 0,0])
  55         cube([50,50,50]);
  56     }
  57     for (x=[-holedist,0])
  58       translate([x, 0, tabunder]) {
  59         translate([0, -1, 0]) {
  60           rotate([-90,0,0]) {
  61             cylinder(r= holedia/2+0.5, h=thick+2, $fn=20);
  62           }
  63         }
  64         translate([0, 19.95 + thick, 0])
  65           cube(center=true,[10,40,10]);
  66       }
  67   }
  68   Tongue(tonguewidth,tonguethick,totaldepth,3);
  69   translate([tongue2x,0,0])
  70     Tongue(tongue2width,tongue2thick,tongue2depth+thick,5);
  71 }
  72
  73 Object();