cable-hole-trunking-cover.scad

   1 // -*- C -*-
   2
   3 holedia = 25.4;
   4
   5 sidewidth = 5;
   6 tapewidth = 7;
   7 tapethick = 1;
   8
   9 innerz = 10;
  10
  11 basex = holedia + sidewidth*2;
  12 basey = holedia + tapewidth*2;
  13
  14 bevelz = 3;
  15 bevelslope = 0.75;
  16 bevely = bevelz * bevelslope;
  17
  18 sideslop = 0.5;
  19
  20 basebaset = 2;
  21 sidewallt = 3;
  22
  23 lidt = 2;
  24 endwallt = 2;
  25 zslop = 0.75;
  26
  27 module sheared_cube(sz, xperz, yperz) {
  28   multmatrix([[1,0,xperz,0],
  29               [0,1,yperz,0],
  30               [0,0,1,    0],
  31               [0,0,0,    1]])
  32     cube(sz);
  33 }
  34
  35 module Base(){
  36   difference(){
  37     union(){
  38       for (mir=[0,1]) mirror([0,mir,0]) {
  39         translate([0, basey/2 - sidewallt, 0])
  40           sheared_cube([basex, sidewallt, bevelz], 0, bevelslope);
  41         cube([basex, basey/2, basebaset]);
  42         rotate([90, 0, 90])
  43           linear_extrude(height=endwallt)
  44           polygon([[-0.1,             0],
  45                    [basey/2,          0],
  46                    [basey/2 + bevely, bevelz],
  47                    [basey/2 + bevely, innerz],
  48                    [-0.1,             innerz]]);
  49       }
  50     }
  51     translate([basex/2, 0, -1])
  52       cylinder(r=holedia/2, h=bevelz+2);
  53   }
  54 }
  55
  56 module Lid(){
  57   lidx = basex;
  58   for (mir=[0,1]) mirror([0,mir,0]) {
  59     translate([0, basey/2 + sideslop, 0])
  60       sheared_cube([lidx, sidewallt, bevelz], 0, bevelslope);
  61     translate([0, basey/2 + sideslop + bevely, -tapethick])
  62       cube([lidx, sidewallt, innerz + tapethick + lidt + zslop]);
  63     translate([0, 0, innerz + zslop])
  64       cube([lidx, basey/2 + sideslop + bevely + sidewallt, lidt]);
  65   }
  66 }
  67
  68 Base();
  69 Lid();