X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=light-bracket.scad;h=c49dc096c086f40e01963494c03b1f8f6de68b2c;hp=f5cdfe1457d56f627c10660dc33031130209aa58;hb=032c9fe163865fd509a7e374f5f0857f65e3dc2d;hpb=38e62f2fca1af87e874f924dc886a10f30267802

diff --git a/light-bracket.scad b/light-bracket.scad
index f5cdfe1..c49dc09 100644
--- a/light-bracket.scad
+++ b/light-bracket.scad
@@ -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 ]);
@@ -77,33 +102,38 @@ 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);
 }
 
 module bracket() {
+	// this is the actual thing we want
 	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
 	}
 }
 
-bracket();
+intersection() {
+	!bracket();
+	translate([-50,6,-50]) #cube(center=false, [100,27,100]);
+}