X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=lock-inframe-bracket.scad;h=bfa6e39699b9a8297c509adaf1ffb3143e294c47;hb=ba7c5b240dcdab5fa3f4e3f7823bb828551471f0;hp=aee64bc9152759386816912f2c7b694be313eb0d;hpb=83dbf0a70c5b79ee649dbaa736947bd6c50eec25;p=reprap-play.git

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index aee64bc..bfa6e39 100644
--- a/lock-inframe-bracket.scad
+++ b/lock-inframe-bracket.scad
@@ -5,7 +5,7 @@
 
 include <funcs.scad>
 
-tube_dia = 27.5 + 1.625;
+tube_dia = 27.5 + 1.625 + 1.32;
 lock_w = 42.5 + 0.5;
 lock_d = 28.0 + 0.5;
 main_h = 45.0;
@@ -14,11 +14,11 @@ backflange_hole_dy = -1;
 lockshaft_dia = 14.35;
 
 cliprecess_h = 16;
-total_h = 45;
+total_h = 75;
 
 back_gap = 12.5;
-main_th = 3.50;
-tube_th = 4.00;
+main_th = 4.50;
+tube_th = 5.50;
 
 midweb_d = 3;
 clip_th = 3.5;
@@ -42,12 +42,10 @@ divide_shaft_w = 1.75;
 divide_shaft_l = 1.5;
 divide_head_dx = 1.75;
 divide_head_th = 1.5;
-divide_gap = 0.50;
-divide_heads = 2;
+divide_gap = 0.75;
 
 divide_angle = 26;
 divide_fudge_r = 4.75;
-divide_around = 3.5;
 
 backflange_angle = 20;
 
@@ -97,34 +95,6 @@ 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]);
-      }
-    }
-    translate([-0.1, (l + t) * divide_heads])
-      square([w + g, g]);
-  }
-}
-
-module DividePlanInPlace(xl=10){
-  rotate([0,0, -divide_angle])
-    translate([ -tube_dia/2 -tube_th/2 - divide_fudge_r, 0])
-    DividePlan(xl);
-}
-
 module DivideHook(){ ////toplevel
   w = tube_th/2;
   d = divide_gap;
@@ -143,6 +113,7 @@ module DivideHook(){ ////toplevel
 module DivideCut(){
   w = tube_th/2;
   d = divide_gap;
+  br = tube_dia/2 + tube_th;
 
   difference(){
     offset(r=divide_gap) DivideHook();
@@ -151,6 +122,22 @@ module DivideCut(){
   }
 }
 
+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([-2*w, 0]) mirror([0,1]) square(4*w);
+  }
+}
+
 module DivideSurround(){
   w = tube_th/2;
   d = divide_gap;
@@ -209,12 +196,13 @@ module MainPlan(){ ////toplevel
     circle(r = tube_dia/2);
 
     DivideInPlace() DivideCut();
+    DivideInPlace() DivideCutB();
   }
 }
 
 lockshaft_or = lockshaft_r + [clip_th,clip_th];
 cliprecess_ymax = cliprecess_h - lockshaft_r[1];
-clip_ymin = cliprecess_ymax - total_h;
+clip_ymin = cliprecess_ymax - main_h;
 clip_ogap = clip_gap + clip_th*2;
 
 module ClipElevationPositive(){
@@ -274,9 +262,27 @@ module ThroughHoles(){
 
   ThroughHole( clipbolt_dia/2,
 	       lock_0y + lock_d/2 + clip_d/2 + front_th/2,
-	       total_h - cliprecess_h - clip_th - clip_d/2 );
+	       main_h - cliprecess_h - clip_th - clip_d/2 );
+}
+
+module SlopeTrimElevation(){
+  far_corner_nom = [ lock_0y + lock_d/2, main_h ];
+  round_centre = far_corner_nom + lock_d/2 * [0,1];
+  hull(){
+    translate(round_centre) circle(r= lock_d/2);
+    translate([ lock_0y - lock_d/2, total_h ]) square([ lock_d + clip_d, 1 ]);
+    translate(far_corner_nom) square([clip_d*2, 1]);
+  }
 }
 
+module SlopeTrim(){
+  rotate([0,90,0])
+    rotate([0,0,90])
+    translate([0,0, -lock_w])
+    linear_extrude(convexity=100, height=lock_w*2)
+    SlopeTrimElevation();
+}
+    
 module MainPositive(){
   difference(){
     union(){
@@ -291,6 +297,7 @@ module Bracket(){ ////toplevel
   difference(){
     MainPositive();
     ThroughHoles();
+    SlopeTrim();
   }
 }
 
@@ -324,10 +331,6 @@ module Demo(){ ////toplevel
 				       back_ohw + 0.25);
 }
 
-module DividePlanDemo(){ ////toplevel
-  DividePlan();
-}
-
 module DivideDemo(){ ////toplevel
   color("black") translate([0,0,-2]) MainPlan();
   color("grey") DivideInPlace() DivideHook();