lock-inframe-bracket: new divide, drop old thing

[reprap-play.git] / lock-inframe-bracket.scad

diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad
index b688252eda9bb38be3beee4e13efba54a8201633..f1505675bb1a3bf5c4efc528ce1921e53e7c0cdb 100644 (file)
--- a/lock-inframe-bracket.scad
+++ b/lock-inframe-bracket.scad
@@ -10,14 +10,15 @@ 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;
 total_h = 45;
 
-back_gap = 14.5;
-main_th = 3.25;
-tube_th = 2.50;
+back_gap = 12.5;
+main_th = 3.50;
+tube_th = 4.00;
 
 midweb_d = 3;
 clip_th = 3.5;
@@ -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;
@@ -35,15 +38,18 @@ join_cr = 9;
 
 tube_rear_extra_th = 1;
 
-divide_shaft_w = 1.5;
+divide_shaft_w = 1.75;
 divide_shaft_l = 1.5;
-divide_head_dx = 1.5;
+divide_head_dx = 1.75;
 divide_head_th = 1.5;
 divide_gap = 0.50;
-divide_heads = 1;
+divide_heads = 2;
+
+divide_angle = 26;
+divide_fudge_r = 4.75;
+divide_around = 3.5;
 
-divide_angle = 35;
-divide_fudge_r = 3;
+backflange_angle = 20;
 
 // calculated
 
@@ -52,7 +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;
@@ -91,35 +97,68 @@ 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]);
+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 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 DividePlanInPlace(){
+module DivideInPlace(){
   rotate([0,0, -divide_angle])
-    translate([ -tube_dia/2 -tube_th/2 - divide_fudge_r, 0])
-    DividePlan();
+    translate([ -tube_dia/2 -tube_th/2, 0])
+    children();
 }
 
-module MainPlan(){
+module MainPlan(){ ////toplevel
   difference(){
     union(){
       difference(){
@@ -129,7 +168,8 @@ module MainPlan(){
              translate([0, -t])
                circle(r = tube_or);
          }
-         translate([-back_ohw,0]) mirror([0,1])
+         rotate([0,0, backflange_angle])
+           translate([-back_ohw,0]) mirror([0,1])
            square([back_ohw*2, backflange_ymin]);
 
          translate([0, lock_0y]){
@@ -142,26 +182,23 @@ module MainPlan(){
          }
        }
 
-       translate([-back_gap/2,1]) mirror([0,1])
+       rotate([0,0, backflange_angle])
+         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(){
-       minkowski(){
-         DividePlanInPlace();
-         circle(5);
-       }
-      }
+      DivideInPlace() DivideSurround();
     }
+    translate([0, lock_0y]){
+      oval([lock_w/2, lock_d/2]);
+    }
+
     circle(r = tube_dia/2);
 
-    DividePlanInPlace();
+    DivideInPlace() DivideCut();
+    DivideInPlace() DivideCutB();
   }
 }
 
@@ -206,18 +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,
@@ -234,14 +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])
@@ -251,7 +294,7 @@ module TestTopEdge(){ //// toplevel
   }
 }
 
-module TestClipBoltHole(){ //// toplevel
+module TestClipBoltHole(){ ////toplevel
   intersection(){
     union(){
       translate([0, 0, -5])
@@ -264,6 +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();
@@ -271,7 +327,6 @@ module TestClipBoltHole(){ //// toplevel
 //%ThroughHoles();
 //TestTopEdge();
 //TestClipBoltHole();
-//DividePlan();
 
-Bracket();
+//Bracket();