light-bracket.scad

   1 shrinkage = 1.0126; // width of 56.2 gives 55.5
   2 remote_width= 56.35 * shrinkage;
   3 remote_height=124.7 * shrinkage;
   4 remote_thick=6.1; // 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         translate([ -hook_stem_thick, 0, -base_thick*2 ])
  27                 cube(center=false,
  28                         size=[
  29                                 hook_stem_thick,
  30                                 extent,
  31                                 base_thick*2 + mainhole_thick + hook_hook_thick
  32                         ]);
  33         translate([ -hook_stem_thick, 0, -base_thick*2 ])
  34                 cube(center=false,
  35                         size=[
  36                                 hook_stem_thick+base_margin+base_edgewidth-1,
  37                                 extent,
  38                                 base_thick*2
  39                         ]);
  40         translate([ -hook_stem_thick+1.0, 0, mainhole_thick ])
  41                 rotate(v=[0,1,0], a=-30)
  42                 cube(center=false,
  43                         size=[
  44                                 3,
  45                                 extent,
  46                                 hook_hook_thick
  47                         ]);
  48         //difference() {
  49         //      #translate([ -hook_stem_thick, 0, -base_thick*2 ])
  50         //              cube(center=false,
  51         //                      size=[
  52         //              hook_stem_thick+base_margin+base_edgewidth-1,
  53         //              extent,
  54         //              base_thick*2 + mainhole_thick + hook_hook_thick
  55         //                              ]);
  56         //      translate([hook_hook_len, -5, 0])
  57         //               cube(center=false, size=[ 20, extent+10, 30 ]);
  58         //}
  59 }
  60
  61 module hhookside(extent) {
  62         translate([ -remote_width/2, 0, 0 ])
  63                 hhook(extent);
  64 }
  65
  66 module hhookbot(extent) {
  67         rotate(a=90, v=[0,0,1]) hhook(extent);
  68 }
  69
  70 module hstuff() {
  71         translate([0,70,0]) hhookside(15);
  72         translate([0,10,0]) hhookside(15);
  73         translate([-10,0,0]) hhookbot(15);
  74 }
  75
  76 module slashes() {
  77         for (y=[-30 : 60 : +40])
  78                 translate([0,y,0])
  79                         rotate(v=[0,0,1],a=45)
  80                                 cube(center=true, [ 5,200,200 ]);
  81 }
  82
  83 module base() {
  84         translate([ 0, base_height/2 + base_margin, -base_thick/2 ])
  85         intersection() {
  86                 cube(center=true,
  87                         [ base_width, base_height, base_thick+10 ]);
  88                 union() {
  89                         difference() {
  90                                 cube(center=true, [ 200,200,200 ]);
  91                                 cube(center=true,
  92                                         [ base_width - base_edgewidth*2,
  93                                           base_height - base_edgewidth*2,
  94                                           base_thick + 15 ]);
  95
  96                         }
  97                         slashes();
  98                         mirror([1,0,0]) slashes();
  99                 }
 100         }
 101 //      translate([-base_width/2, base_margin, -base_thick*2])
 102 //              cube(center=false, [base_width,base_height,base_thick+10]);
 103 }
 104
 105 module stuff() {
 106         hstuff();
 107         mirror([1,0,0]) hstuff();
 108         base();
 109         for (y=screw_ys) translate([0, y, -20])
 110                 cylinder(r=6.5, h=21);
 111 }
 112
 113 module screwhole(holedia, csdia) {
 114         // screw goes along z axis downwards
 115         // origin is top of head
 116         // results are positive, so this should be subtracted
 117         translate([0,0,-100]) cylinder(h=200, r=holedia/2);
 118         csdist=(csdia-holedia)/2;
 119         translate([0,0,-csdist]) cylinder(h=csdist, r1=holedia/2, r2=csdia/2);
 120         cylinder(h=100, r=csdia/2);
 121 }
 122
 123 module bracket() {
 124         // this is the actual thing we want
 125         difference() {
 126                 stuff();
 127                 mainhole();
 128                 for (y=screw_ys) translate([0, y, 0])
 129                         screwhole(5.4,10); //dia=4 gives 2.9
 130                                          //holedia=10 gives 9.0 want 7.0
 131                 translate([0,0,-50 - base_thick])
 132                         cube(center=true,[300,300,100]); // print bed
 133         }
 134 }
 135
 136 intersection() {
 137         !bracket();
 138         translate([-50,6,-50]) #cube(center=false, [100,27,100]);
 139 }