X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=lock-inframe-bracket.scad;h=b688252eda9bb38be3beee4e13efba54a8201633;hb=fb47c4fceb9627219c6716a4084f82ec21a38f27;hp=7abfb9bfffbfee85099290912e8931949b21f6bd;hpb=d1f9fc4c0e7a12e00138ebb6b899a6a120be3864;p=reprap-play.git

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index 7abfb9b..b688252 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 = 12.5;
-main_th = 2.75;
-tube_th = 2.125;
+back_gap = 14.5;
+main_th = 3.25;
+tube_th = 2.50;
 
 midweb_d = 3;
 clip_th = 3.5;
@@ -22,7 +25,7 @@ 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 = 4.5;
 
@@ -32,6 +35,16 @@ join_cr = 9;
 
 tube_rear_extra_th = 1;
 
+divide_shaft_w = 1.5;
+divide_shaft_l = 1.5;
+divide_head_dx = 1.5;
+divide_head_th = 1.5;
+divide_gap = 0.50;
+divide_heads = 1;
+
+divide_angle = 35;
+divide_fudge_r = 3;
+
 // calculated
 
 lockshaft_r = [1, 1] * lockshaft_dia / 2;
@@ -78,36 +91,77 @@ module JoinCircs(jr){
   }
 }
 
+module DividePlan(){
+  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([10, 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]);
+      }
+    }
+    translate([-0.1, (l + t) * divide_heads])
+      square([w + g, g]);
+  }
+}
+
+module DividePlanInPlace(){
+  rotate([0,0, -divide_angle])
+    translate([ -tube_dia/2 -tube_th/2 - divide_fudge_r, 0])
+    DividePlan();
+}
+
 module MainPlan(){
   difference(){
     union(){
-      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]);
-
-      translate([0, lock_0y]){
-	oval(lock_or);
+      difference(){
+	union(){
+	  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]);
+
+	  translate([0, lock_0y]){
+	    oval(lock_or);
+	  }
+
+	  hull(){
+	    JoinCircs(0.01);
+	    polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
+	  }
+	}
+
+	translate([-back_gap/2,1]) mirror([0,1])
+	  square([back_gap, backflange_ymin+2]);
+
+	translate([0, lock_0y]){
+	  oval([lock_w/2, lock_d/2]);
+	}
+
+	JoinCircs(join_cr);
       }
 
       hull(){
-	JoinCircs(0.01);
-	polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
+	minkowski(){
+	  DividePlanInPlace();
+	  circle(5);
+	}
       }
     }
-
     circle(r = tube_dia/2);
-    translate([-back_gap/2,1]) mirror([0,1])
-      square([back_gap, backflange_ymin+2]);
-
-    translate([0, lock_0y]){
-      oval([lock_w/2, lock_d/2]);
-    }
 
-    JoinCircs(join_cr);
+    DividePlanInPlace();
   }
 }
 
@@ -217,5 +271,7 @@ module TestClipBoltHole(){ //// toplevel
 //%ThroughHoles();
 //TestTopEdge();
 //TestClipBoltHole();
+//DividePlan();
 
 Bracket();
+