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=6;
  10 base_margin=4.0;
  11 base_width=remote_width-base_margin*2;
  12 base_height=remote_height-base_margin*2;
  13 base_edgewidth=4;
  14
  15 // origin is base of mainhole
  16
  17 module mainhole() {
  18         translate([ -remote_width/2, 0, 0 ])
  19         cube(center=false,
  20                 size=[ remote_width, remote_height, mainhole_thick ] );
  21 }
  22
  23 module hhook(extent) {
  24         difference() {
  25                 translate([ -hook_stem_thick, 0, -base_thick*2 ])
  26                         cube(center=false,
  27                                 size=[
  28                         hook_stem_thick+base_margin+base_edgewidth-1,
  29                         extent,
  30                         base_thick*2 + mainhole_thick + hook_hook_thick
  31                                         ]);
  32                 translate([hook_hook_len, -5, 0])
  33                          cube(center=false, size=[ 20, extent+10, 30 ]);
  34         }
  35 }
  36
  37 module hhookside(extent) {
  38         translate([ -remote_width/2, 0, 0 ])
  39                 hhook(extent);
  40 }
  41
  42 module hhookbot(extent) {
  43         rotate(a=90, v=[0,0,1]) hhook(extent);
  44 }
  45
  46 module hstuff() {
  47         translate([0,70,0]) hhookside(15);
  48         translate([0,10,0]) hhookside(15);
  49         translate([-10,0,0]) hhookbot(15);
  50 }
  51
  52 module slashes() {
  53         for (y=[-35 : 35 : +40])
  54                 translate([0,y,0])
  55                         rotate(v=[0,0,1],a=45)
  56                                 cube(center=true, [ 5,200,200 ]);
  57 }
  58
  59 module base() {
  60         translate([ 0, base_height/2 + base_margin, -base_thick/2 ])
  61         intersection() {
  62                 cube(center=true,
  63                         [ base_width, base_height, base_thick+10 ]);
  64                 union() {
  65                         difference() {
  66                                 cube(center=true, [ 200,200,200 ]);
  67                                 cube(center=true,
  68                                         [ base_width - base_edgewidth*2,
  69                                           base_height - base_edgewidth*2,
  70                                           base_thick + 15 ]);
  71
  72                         }
  73                         slashes();
  74                         mirror([1,0,0]) slashes();
  75                 }
  76         }
  77 //      translate([-base_width/2, base_margin, -base_thick*2])
  78 //              cube(center=false, [base_width,base_height,base_thick+10]);
  79 }
  80
  81 screw_ys=[ 20, remote_height-30 ];
  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 base of countersink
  94         // results are positive, so this should be subtracted
  95         translate([0,0,-100]) cylinder(h=200, r=holedia/2);
  96         cylinder(h=100, r=csdia/2);
  97 }
  98
  99 module bracket() {
 100         // this is the actual thing we want
 101         difference() {
 102                 stuff();
 103                 mainhole();
 104                 for (y=screw_ys) translate([0, y, -base_thick+2])
 105                         screwhole(5,8); //dia=4 gives 2.9
 106                                          //holedia=10 gives 9.0 want 7.0
 107                 translate([0,0,-50 - base_thick])
 108                         cube(center=true,[300,300,100]); // print bed
 109         }
 110 }
 111
 112 intersection() {
 113         !bracket();
 114         cube(center=true, [100,55,100]);
 115 }