chiark / gitweb /
ksafe-base: reduce bevel since must be much less than cnr_rad
[reprap-play.git] / light-bracket.scad
index f97611f..c49dc09 100644 (file)
@@ -1,16 +1,19 @@
-remote_width=56.2;
-remote_height=124.7;
-remote_thick=6.8;
+shrinkage = 1.0126; // width of 56.2 gives 55.5
+remote_width= 56.35 * shrinkage;
+remote_height=124.7 * shrinkage;
+remote_thick=6.1; // 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
 
 module mainhole() {
@@ -20,17 +23,39 @@ module mainhole() {
 }
 
 module hhook(extent) {
-       difference() {
-               translate([ -hook_stem_thick, 0, -base_thick*2 ])
-                       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 ]);
-       }
+       translate([ -hook_stem_thick, 0, -base_thick*2 ])
+               cube(center=false,
+                       size=[
+                               hook_stem_thick,
+                               extent,
+                               base_thick*2 + mainhole_thick + hook_hook_thick
+                       ]);
+       translate([ -hook_stem_thick, 0, -base_thick*2 ])
+               cube(center=false,
+                       size=[
+                               hook_stem_thick+base_margin+base_edgewidth-1,
+                               extent,
+                               base_thick*2
+                       ]);
+       translate([ -hook_stem_thick+1.0, 0, mainhole_thick ])
+               rotate(v=[0,1,0], a=-30)
+               cube(center=false,
+                       size=[
+                               3,
+                               extent,
+                               hook_hook_thick
+                       ]);
+       //difference() {
+       //      #translate([ -hook_stem_thick, 0, -base_thick*2 ])
+       //              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 ]);
+       //}
 }
 
 module hhookside(extent) {
@@ -49,7 +74,7 @@ module hstuff() {
 }
 
 module slashes() {
-       for (y=[-35 : 35 : +40])
+       for (y=[-30 : 60 : +40])
                translate([0,y,0])
                        rotate(v=[0,0,1],a=45)
                                cube(center=true, [ 5,200,200 ]);
@@ -77,21 +102,21 @@ module base() {
 //             cube(center=false, [base_width,base_height,base_thick+10]);
 }
 
-screw_ys=[ 20, remote_height-30 ];
-
 module stuff() {
        hstuff();
        mirror([1,0,0]) hstuff();
        base();
        for (y=screw_ys) translate([0, y, -20])
-               cylinder(r=7.5, h=21);
+               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);
 }
 
@@ -100,14 +125,15 @@ module bracket() {
        difference() {
                stuff();
                mainhole();
-               for (y=screw_ys) translate([0, y, -base_thick+2])       
-                       screwhole(4,10);
+               for (y=screw_ys) translate([0, y, 0])   
+                       screwhole(5.4,10); //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]);
+       !bracket();
+       translate([-50,6,-50]) #cube(center=false, [100,27,100]);
 }