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 endslop = 0.75;
  27
  28 module sheared_cube(sz, xperz, yperz) {
  29   multmatrix([[1,0,xperz,0],
  30               [0,1,yperz,0],
  31               [0,0,1,    0],
  32               [0,0,0,    1]])
  33     cube(sz);
  34 }
  35
  36 module Base(){
  37   difference(){
  38     union(){
  39       for (mir=[0,1]) mirror([0,mir,0]) {
  40         translate([0, basey/2 - sidewallt, 0])
  41           sheared_cube([basex, sidewallt, bevelz], 0, bevelslope);
  42         cube([basex, basey/2, basebaset]);
  43         rotate([90, 0, 90])
  44           linear_extrude(height=endwallt)
  45           polygon([[-0.1,             0],
  46                    [basey/2,          0],
  47                    [basey/2 + bevely, bevelz],
  48                    [basey/2 + bevely, innerz],
  49                    [-0.1,             innerz]]);
  50       }
  51     }
  52     translate([basex/2, 0, -1])
  53       cylinder(r=holedia/2, h=bevelz+2);
  54   }
  55 }
  56
  57 module Lid(){
  58   lidx = basex + endslop + endwallt;
  59   for (mir=[0,1]) mirror([0,mir,0]) {
  60     translate([0, basey/2 + sideslop, 0])
  61       sheared_cube([lidx, sidewallt, bevelz], 0, bevelslope);
  62     translate([0, basey/2 + sideslop + bevely, -tapethick])
  63       cube([lidx, sidewallt, innerz + tapethick + lidt + zslop]);
  64     translate([0, -1, innerz + zslop])
  65       cube([lidx, 1 + basey/2 + sideslop + bevely + sidewallt, lidt]);
  66     translate([basex + endslop, -1, -tapethick])
  67       cube([endwallt, 1 + basey/2 + sideslop + bevely + sidewallt,
  68             tapethick + innerz + zslop + 0.1]);
  69   }
  70 }
  71
  72 Base();
  73 %Lid();