light-bracket.scad

   1 shrinkage = 1.0126; // width of 56.2 gives 55.5
   2 remote_width= 56.2 * shrinkage;
   3 remote_height=124.7 * shrinkage;
   4 remote_thick=7.3; // height of 6.8 gives 6.3
   5 mainhole_thick=remote_thick+1;
   6 hook_hook_thick=1.5;
   7 hook_stem_thick=1.5;
   8 hook_hook_len=1.5;
   9 base_thick=3.5;
  10 base_margin=3.0;
  11 base_width=remote_width-base_margin*2;
  12 base_height=remote_height-base_margin*2;
  13 base_edgewidth=4;
  14
  15 screw_ys=[ 28, remote_height-28 ];
  16
  17 // origin is base of mainhole
  18
  19 module mainhole() {
  20         translate([ -remote_width/2, 0, 0 ])
  21         cube(center=false,
  22                 size=[ remote_width, remote_height, mainhole_thick ] );
  23 }
  24
  25 module hhook(extent) {
  26         difference() {
  27                 translate([ -hook_stem_thick, 0, -base_thick*2 ])
  28                         cube(center=false,
  29                                 size=[
  30                         hook_stem_thick+base_margin+base_edgewidth-1,
  31                         extent,
  32                         base_thick*2 + mainhole_thick + hook_hook_thick
  33                                         ]);
  34                 translate([hook_hook_len, -5, 0])
  35                          cube(center=false, size=[ 20, extent+10, 30 ]);
  36         }
  37 }
  38
  39 module hhookside(extent) {
  40         translate([ -remote_width/2, 0, 0 ])
  41                 hhook(extent);
  42 }
  43
  44 module hhookbot(extent) {
  45         rotate(a=90, v=[0,0,1]) hhook(extent);
  46 }
  47
  48 module hstuff() {
  49         translate([0,70,0]) hhookside(15);
  50         translate([0,10,0]) hhookside(15);
  51         translate([-10,0,0]) hhookbot(15);
  52 }
  53
  54 module slashes() {
  55         for (y=[-30 : 60 : +40])
  56                 translate([0,y,0])
  57                         rotate(v=[0,0,1],a=45)
  58                                 cube(center=true, [ 5,200,200 ]);
  59 }
  60
  61 module base() {
  62         translate([ 0, base_height/2 + base_margin, -base_thick/2 ])
  63         intersection() {
  64                 cube(center=true,
  65                         [ base_width, base_height, base_thick+10 ]);
  66                 union() {
  67                         difference() {
  68                                 cube(center=true, [ 200,200,200 ]);
  69                                 cube(center=true,
  70                                         [ base_width - base_edgewidth*2,
  71                                           base_height - base_edgewidth*2,
  72                                           base_thick + 15 ]);
  73
  74                         }
  75                         slashes();
  76                         mirror([1,0,0]) slashes();
  77                 }
  78         }
  79 //      translate([-base_width/2, base_margin, -base_thick*2])
  80 //              cube(center=false, [base_width,base_height,base_thick+10]);
  81 }
  82
  83 module stuff() {
  84         hstuff();
  85         mirror([1,0,0]) hstuff();
  86         base();
  87         for (y=screw_ys) translate([0, y, -20])
  88                 cylinder(r=6.5, h=21);
  89 }
  90
  91 module screwhole(holedia, csdia) {
  92         // screw goes along z axis downwards
  93         // origin is top of head
  94         // results are positive, so this should be subtracted
  95         translate([0,0,-100]) cylinder(h=200, r=holedia/2);
  96         csdist=(csdia-holedia)/2;
  97         translate([0,0,-csdist]) cylinder(h=csdist, r1=holedia/2, r2=csdia/2);
  98         cylinder(h=100, r=csdia/2);
  99 }
 100
 101 module bracket() {
 102         // this is the actual thing we want
 103         difference() {
 104                 stuff();
 105                 mainhole();
 106                 for (y=screw_ys) translate([0, y, 0])
 107                         screwhole(5,9); //dia=4 gives 2.9
 108                                          //holedia=10 gives 9.0 want 7.0
 109                 translate([0,0,-50 - base_thick])
 110                         cube(center=true,[300,300,100]); // print bed
 111         }
 112 }
 113
 114 intersection() {
 115         !bracket();
 116         cube(center=true, [100,55,100]);
 117 }