X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=lock-inframe-bracket.scad;h=618be8900af34dbdc7bab720253c2c6a27563421;hb=a83f55ec09411c2805b717b9c92559546bb28109;hp=376662eb0d55bcab7b0f8c5e8b70e6cf9ae53dc1;hpb=156db7e3f7e1588b02761647901279164869bbf8;p=reprap-play.git

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index 376662e..618be89 100644
--- a/lock-inframe-bracket.scad
+++ b/lock-inframe-bracket.scad
@@ -10,6 +10,7 @@ lock_w = 42.5 + 0.5;
 lock_d = 28.0 + 0.5;
 main_h = 45.0;
 backflange_d = 12;
+backflange_hole_dy = -1;
 lockshaft_dia = 14.35;
 
 cliprecess_h = 16;
@@ -27,6 +28,8 @@ clip_d = 22.0;
 mountscrew_dia = 4 + 0.5;
 clipbolt_dia = 5 + 0.6;
 
+mountscrew_washer = 10;
+
 backflange_th = 4.5;
 
 $fn=50;
@@ -55,7 +58,7 @@ front_th = main_th;
 
 tube_or = tube_dia/2 + tube_th;
 back_ohw = back_gap/2 + backflange_th;
-backflange_ymin = tube_or+backflange_d;
+backflange_ymin = tube_dia/2 + backflange_d;
 
 lock_0y = tube_dia/2 + lock_d/2 + midweb_d;
 lock_0x = lock_w/2 - lock_d/2;
@@ -122,7 +125,51 @@ module DividePlanInPlace(xl=10){
     DividePlan(xl);
 }
 
-module MainPlan(){
+module DivideHook(){ ////toplevel
+  w = tube_th/2;
+  d = divide_gap;
+
+  translate([-1,0] * (w + d + w)){
+    for (sx=[-1,+1])
+      translate([-(w + w+d) * sx, 0]) circle(r= w);
+    difference(){
+      circle(r = 3*w + d);
+      circle(r =   w + d);
+      translate([-10*w, -10*w]) square([20*w, 10*w]);
+    }
+  }
+}
+
+module DivideCut(){
+  w = tube_th/2;
+  d = divide_gap;
+
+  difference(){
+    offset(r=divide_gap) DivideHook();
+    DivideHook();
+    translate([-2*w,0]) mirror([0,1]) square([4*w, 4*w]);
+  }
+}
+
+module DivideInPlace(){
+  rotate([0,0, -divide_angle])
+    translate([ -tube_dia/2 -tube_th/2, 0])
+    children();
+}
+
+module DivideSurround(){
+  w = tube_th/2;
+  d = divide_gap;
+
+  offset(r= w*2) {
+    hull() {
+      DivideCut();
+      translate([-(4*w + 2*d), 8*w]) circle(r=w);
+    }
+  }
+}
+
+module MainPlan(){ ////toplevel
   difference(){
     union(){
       difference(){
@@ -153,12 +200,7 @@ module MainPlan(){
 	JoinCircs(join_cr);
       }
 
-      hull(){
-	minkowski(){
-	  DividePlanInPlace(0.1);
-	  circle(divide_around);
-	}
-      }
+      DivideInPlace() DivideSurround();
     }
     translate([0, lock_0y]){
       oval([lock_w/2, lock_d/2]);
@@ -166,7 +208,7 @@ module MainPlan(){
 
     circle(r = tube_dia/2);
 
-    DividePlanInPlace();
+    DivideInPlace() DivideCut();
   }
 }
 
@@ -211,18 +253,24 @@ module ExtrudeClipElevation(extra=0){
     children(0);
 }
 
-module ThroughHole(r, y, z) {
-  translate([-50, y, z])
+module ThroughHole(r, y, z, x=-50) {
+  translate([x, y, z])
     rotate([0, 90, 0])
     cylinder(r=r, h=100, $fn=20);
 }
 
-module ThroughHoles(){
+module MountingHoleCylinders(r, x=-50){
   for (z=[ 1/4, 3/4 ]) {
-    ThroughHole( mountscrew_dia/2,
-		 -tube_or -0.5*backflange_d,
-		 total_h * z );
+    rotate([0,0, backflange_angle])
+      ThroughHole( r,
+		   -tube_dia/2 -0.5*backflange_d + backflange_hole_dy,
+		   total_h * z,
+		   x);
   }
+}
+
+module ThroughHoles(){
+  MountingHoleCylinders(mountscrew_dia/2);
 
   ThroughHole( clipbolt_dia/2,
 	       lock_0y + lock_d/2 + clip_d/2 + front_th/2,
@@ -269,6 +317,23 @@ module TestClipBoltHole(){ ////toplevel
   }
 }
 
+module Demo(){ ////toplevel
+  Bracket();
+  color("blue") MountingHoleCylinders(mountscrew_dia/2 - 0.1);
+  color("black") MountingHoleCylinders(mountscrew_washer/2,
+				       back_ohw + 0.25);
+}
+
+module DividePlanDemo(){ ////toplevel
+  DividePlan();
+}
+
+module DivideDemo(){ ////toplevel
+  color("black") translate([0,0,-2]) MainPlan();
+  color("grey") DivideInPlace() DivideHook();
+  color("blue") translate([0,0,-4]) DivideInPlace() DivideCut();
+}
+
 //MainPlan();
 //ClipElevationPositive();
 //ClipElevation();
@@ -276,7 +341,6 @@ module TestClipBoltHole(){ ////toplevel
 //%ThroughHoles();
 //TestTopEdge();
 //TestClipBoltHole();
-//DividePlan();
 
 //Bracket();