light bracket: fewer slashes

[reprap-play.git] / light-bracket.scad

diff --git a/light-bracket.scad b/light-bracket.scad
index c5715f605e05147107e517a4ea2b9653d4e363f3..f64e81c7a8d1661ea0aff2bfa821b76ab11df5ad 100644 (file)
--- a/light-bracket.scad
+++ b/light-bracket.scad
@@ -1,14 +1,18 @@
-remote_width=56.2;
-remote_height=124.7;
-remote_thick=6.8;
+shrinkage = 1.0126; // width of 56.2 gives 55.5
+remote_width= 56.2 * shrinkage;
+remote_height=124.7 * shrinkage;
+remote_thick=7.3; // height of 6.8 gives 6.3
 mainhole_thick=remote_thick+1;
 hook_hook_thick=1.5;
 hook_stem_thick=1.5;
 hook_hook_len=1.5;
-base_thick=6;
-base_margin=4.0;
+base_thick=3.5;
+base_margin=3.0;
 base_width=remote_width-base_margin*2;
 base_height=remote_height-base_margin*2;
+base_edgewidth=4;
+
+screw_ys=[ 28, remote_height-28 ];
 
 // origin is base of mainhole
 
@@ -21,9 +25,12 @@ module mainhole() {
 module hhook(extent) {
        difference() {
                translate([ -hook_stem_thick, 0, -base_thick*2 ])
-                       cube(center=false, size=[ hook_stem_thick+15, extent,
-                               base_thick*2 + mainhole_thick
-                                       + hook_hook_thick ]);
+                       cube(center=false,
+                               size=[
+                       hook_stem_thick+base_margin+base_edgewidth-1,
+                       extent,
+                       base_thick*2 + mainhole_thick + hook_hook_thick
+                                       ]);
                translate([hook_hook_len, -5, 0])
                         cube(center=false, size=[ 20, extent+10, 30 ]);
        }
@@ -44,30 +51,67 @@ module hstuff() {
        translate([-10,0,0]) hhookbot(15);
 }
 
+module slashes() {
+       for (y=[-30 : 60 : +40])
+               translate([0,y,0])
+                       rotate(v=[0,0,1],a=45)
+                               cube(center=true, [ 5,200,200 ]);
+}
+
 module base() {
-       translate([-base_width/2, base_margin, -base_thick*2])
-               cube(center=false, [base_width,base_height,base_thick+10]);
+       translate([ 0, base_height/2 + base_margin, -base_thick/2 ])
+       intersection() {
+               cube(center=true,
+                       [ base_width, base_height, base_thick+10 ]);
+               union() {
+                       difference() {
+                               cube(center=true, [ 200,200,200 ]);
+                               cube(center=true,
+                                       [ base_width - base_edgewidth*2,
+                                         base_height - base_edgewidth*2,
+                                         base_thick + 15 ]);
+                               
+                       }
+                       slashes();
+                       mirror([1,0,0]) slashes();
+               }
+       }
+//     translate([-base_width/2, base_margin, -base_thick*2])
+//             cube(center=false, [base_width,base_height,base_thick+10]);
 }
 
 module stuff() {
        hstuff();
        mirror([1,0,0]) hstuff();
        base();
+       for (y=screw_ys) translate([0, y, -20])
+               cylinder(r=6.5, h=21);
 }
 
 module screwhole(holedia, csdia) {
        // screw goes along z axis downwards
-       // origin is base of countersink
+       // origin is top of head
        // results are positive, so this should be subtracted
        translate([0,0,-100]) cylinder(h=200, r=holedia/2);
+       csdist=(csdia-holedia)/2;
+       translate([0,0,-csdist]) cylinder(h=csdist, r1=holedia/2, r2=csdia/2);
        cylinder(h=100, r=csdia/2);
 }
 
-difference() {
-       stuff();
-       mainhole();
-       translate([0, 20,               -base_thick+2]) screwhole(4,10);
-       translate([0, remote_height-30, -base_thick+2]) screwhole(4,10);
-       translate([0,0,-50 - base_thick])
-               cube(center=true,[300,300,100]); // print bed
+module bracket() {
+       // this is the actual thing we want
+       difference() {
+               stuff();
+               mainhole();
+               for (y=screw_ys) translate([0, y, 0])   
+                       screwhole(5,9); //dia=4 gives 2.9
+                                        //holedia=10 gives 9.0 want 7.0
+               translate([0,0,-50 - base_thick])
+                       cube(center=true,[300,300,100]); // print bed
+       }
+}
+
+intersection() {
+       !bracket();
+       cube(center=true, [100,55,100]);
 }