X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=lock-inframe-bracket.scad;h=66e9f37858962e1efb80bde3426876951a3bd328;hb=8a1445c5c91b7b976950a8138b6bcd23d387ed9c;hp=75c9a52e8f05f75f44ba327486bdcc46bb905a27;hpb=fce4ceaa5573e55d68d794c1a37a4bbc59c2e455;p=reprap-play.git

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index 75c9a52..66e9f37 100644
--- a/lock-inframe-bracket.scad
+++ b/lock-inframe-bracket.scad
@@ -1,5 +1,8 @@
 // -*- C -*-
 
+// use shell thickness 1.50
+// use fill density 40%
+
 include <funcs.scad>
 
 tube_dia = 27.5 + 1.625;
@@ -12,9 +15,9 @@ lockshaft_dia = 14.35;
 cliprecess_h = 16;
 total_h = 45;
 
-back_gap = 10;
-main_th = 2.5;
-tube_th = 2.25;
+back_gap = 14.5;
+main_th = 3.25;
+tube_th = 2.50;
 
 midweb_d = 3;
 clip_th = 3.5;
@@ -22,13 +25,21 @@ clip_gap = 2.5;
 clip_d = 22.0;
 
 mountscrew_dia = 4 + 0.5;
-clipbolt_dia = 5 + 0.1;
+clipbolt_dia = 5 + 0.6;
 
-backflange_th = 3.5;
+backflange_th = 4.5;
 
 $fn=50;
 
-join_cr = 5;
+join_cr = 9;
+
+tube_rear_extra_th = 1;
+
+divide_shaft_w = 3;
+divide_shaft_l = 3;
+divide_head_dx = 3;
+divide_head_th = 3;
+divide_gap = 0.75;
 
 // calculated
 
@@ -56,7 +67,8 @@ module oval(sz){ // sz[0] > sz[1]
   }
 }
 
-module JoinCirc(jr){
+module JoinCircs(jr){
+  // http://mathworld.wolfram.com/Circle-CircleIntersection.html
   R = tube_or + join_cr;
   r = lock_or[1] + join_cr;
   d = dist2d( [0,0], lock_0 );
@@ -65,16 +77,40 @@ module JoinCirc(jr){
 
   echo(lock_0x, lock_0y, R,r, d, x,y);
 
-  rotate(atan2(lock_0y, lock_0x)) {
-    translate([x,-y])
-      circle(r= jr);
+  for (m=[0,1]) {
+    mirror([m,0]) {
+      rotate(atan2(lock_0y, lock_0x)) {
+	translate([x,-y])
+	  circle(r= jr);
+      }
+    }
+  }
+}
+
+module DividePlan(){
+  g = divide_gap;
+  dx = divide_head_dx;
+  for (m=[0,1]) mirror([m,0]) {
+    translate([divide_shaft_w, 0]) {
+      square([10, g]);
+      square([10, g]);
+      translate([0, 0]) square([g, divide_shaft_l + g]);
+      translate([0, divide_shaft_l]) square([divide_head_dx + g, g]);
+      translate([dx, divide_shaft_l]) square([g, divide_head_th + g]);
+    }
+    translate([-0.1, divide_shaft_l + divide_head_th])
+      square([divide_shaft_w + divide_head_dx + g, g]);
   }
 }
 
 module MainPlan(){
   difference(){
     union(){
-      circle(r = tube_or);
+      hull(){
+	for (t=[0, tube_rear_extra_th])
+	  translate([0, -t])
+	    circle(r = tube_or);
+      }
       translate([-back_ohw,0]) mirror([0,1])
 	square([back_ohw*2, backflange_ymin]);
 
@@ -83,9 +119,7 @@ module MainPlan(){
       }
 
       hull(){
-	for (m=[0,1])
-	  mirror([m,0])
-	    JoinCirc(0.01);
+	JoinCircs(0.01);
 	polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
       }
     }
@@ -98,9 +132,7 @@ module MainPlan(){
       oval([lock_w/2, lock_d/2]);
     }
 
-    for (m=[0,1])
-      mirror([m,0])
-	JoinCirc(join_cr);
+    JoinCircs(join_cr);
   }
 }
 
@@ -211,4 +243,4 @@ module TestClipBoltHole(){ //// toplevel
 //TestTopEdge();
 //TestClipBoltHole();
 
-//Bracket();
+Bracket();