X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=lock-inframe-bracket.scad;h=f1505675bb1a3bf5c4efc528ce1921e53e7c0cdb;hp=4e062515143bed999170980e06457730b91201b0;hb=4daa86db5c490ab1316027ccf8dcd1fa88e07992;hpb=48a68a9f7ecd9461a5bfd5ed90046c2c3b5cee84

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index 4e06251..f150567 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;
@@ -94,35 +97,68 @@ module JoinCircs(jr){
   }
 }
 
-module DividePlan(xl=10){
-  w = divide_shaft_w;
-  g = divide_gap;
-  l = divide_shaft_l + g;
-  t = divide_head_th + g;
-  dx = divide_head_dx;
-  for (m=[0,1]) mirror([m,0]) {
-    translate([w, 0]) square([xl, g]);
-    for (i=[0:divide_heads-1]) {
-      translate([w, i*(l + t)]) {
-	translate([0, 0]) square([g, l + g]);
-	translate([0, l]) square([divide_head_dx + g, g]);
-	translate([dx, l]) square([g, t + g]);
-	translate([0, l + t])
-	  square([divide_head_dx + g, g]);
+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;
+  br = tube_dia/2 + tube_th;
+
+  difference(){
+    offset(r=divide_gap) DivideHook();
+    DivideHook();
+    translate([-2*w,0]) mirror([0,1]) square([4*w, 4*w]);
+  }
+}
+
+module DivideCutB(){
+  w = tube_th/2;
+  d = divide_gap;
+  br = tube_dia/2 + tube_th;
+  
+  intersection(){
+    translate([br - tube_th/2,0]) {
+      difference(){
+	circle(r=br + d);
+	circle(r=br);
       }
     }
-    translate([-0.1, (l + t) * divide_heads])
-      square([w + g, g]);
+    translate([-2*w, 0]) mirror([0,1]) square(4*w);
   }
 }
 
-module DividePlanInPlace(xl=10){
+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 DivideInPlace(){
   rotate([0,0, -divide_angle])
-    translate([ -tube_dia/2 -tube_th/2 - divide_fudge_r, 0])
-    DividePlan(xl);
+    translate([ -tube_dia/2 -tube_th/2, 0])
+    children();
 }
 
-module MainPlan(){
+module MainPlan(){ ////toplevel
   difference(){
     union(){
       difference(){
@@ -153,12 +189,7 @@ 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 +197,8 @@ module MainPlan(){
 
     circle(r = tube_dia/2);
 
-    DividePlanInPlace();
+    DivideInPlace() DivideCut();
+    DivideInPlace() DivideCutB();
   }
 }
 
@@ -211,18 +243,24 @@ 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,
@@ -239,14 +277,14 @@ module MainPositive(){
   }
 }
 
-module Bracket(){ //// toplevel
+module Bracket(){ ////toplevel
   difference(){
     MainPositive();
     ThroughHoles();
   }
 }
 
-module TestTopEdge(){ //// toplevel
+module TestTopEdge(){ ////toplevel
   intersection(){
     translate([0,0, -total_h])
       translate([0,0, 4])
@@ -256,7 +294,7 @@ module TestTopEdge(){ //// toplevel
   }
 }
 
-module TestClipBoltHole(){ //// toplevel
+module TestClipBoltHole(){ ////toplevel
   intersection(){
     union(){
       translate([0, 0, -5])
@@ -269,6 +307,19 @@ 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 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 +327,6 @@ module TestClipBoltHole(){ //// toplevel
 //%ThroughHoles();
 //TestTopEdge();
 //TestClipBoltHole();
-//DividePlan();
 
-Bracket();
+//Bracket();