scaffold-clamp: prep for print

[reprap-play.git] / scaffold-clamp-common.scad

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 9c9a831b3d6c3c4903afb89ba3b74afb12b84894..edea7e5206e890568396fcdd56d89a3d543f4ed4 100644 (file)
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -10,9 +10,11 @@ pin_gap = 1.5; // around
 
 smooth_r = 15;
 
-bolt_dia = 5 + 0.75;
+bolt_dia = 5;
 bolt_flat = 10 + 1;
 
+nbolts = 2;
+
 open_gap = 10;
 
 hinge_unit = 10;
@@ -20,6 +22,8 @@ hinge_z_gap = 1;
 
 hinge_units = 4;
 
+bolt_gap = 1.0; // total, on both sides
+
 // ---------- vhook ----------
 
 vhook_th = 14;
@@ -30,11 +34,19 @@ hhook_inside = 40;
 hhook_th = 4;
 hhook_l = 40;
 
-// ========== calculated ==========
+// ========== defaults ==========
 
+pin_head_th = th/2;
 pin_dia = th;
+pin_hole_dia = pin_dia/2;
+pin_tail = pin_hole_dia + pin_head_th + hinge_z_gap*3;
+
+// ========== calculated ==========
+
 hole_dia = th + pin_gap;
 
+bolt_hole_r = (bolt_dia + bolt_gap)/2;
+
 main_r = tube_dia/2 + th;
 
 hinge_gap = pin_gap;
@@ -43,7 +55,7 @@ hinge_o_r = 0.5 * hole_dia + th;
 
 hinge_x = -0.5 * tube_dia - hinge_o_r;
 bolt_x = 0.5 * tube_dia + th + bolt_flat * 0.5;
-max_x = bolt_x + max(0.5 + bolt_dia + th, 0.5 * bolt_flat/2);
+max_x = bolt_x + max(bolt_hole_r + th, 0.5 * bolt_flat/2);
 
 flats_y = open_gap/2 + th;
 
@@ -55,6 +67,8 @@ max_z = +total_z/2;
 
 pin_flatten = pin_dia/2 * (1 - cos(45));
 
+bolt_stride = total_z / nbolts;
+
 // calculated - vhook
 
 vhook_inside = 15;
@@ -149,11 +163,11 @@ module HalfClampX(flatten=false){
          linextr(0, hinge_unit) MainPlanA(flatten);
       }
     }
-    for (dz=[-1,+1]) {
-      translate([ bolt_x, 0, dz * total_z/4 ]) {
+    for (j=[0:nbolts-1]) {
+      translate([ bolt_x, 0, min_z + (j + 0.5) * bolt_stride ]) {
        translate([0, -tube_dia/2, 0])
          rotate([-90,0,0])
-         cylinder(r= bolt_dia/2, h= tube_dia);
+         cylinder(r= bolt_hole_r, h= tube_dia);
        translate([0, -flats_y, 0])
          rotate([90,0,0])
          cylinder(r= bolt_flat/2, h= tube_dia/2);
@@ -256,6 +270,29 @@ module HHookPlanDemo(){
 
 // ---------- misc ----------
 
+module PinSitu(){ ////toplevel
+  difference(){
+    union(){
+      translate([0,0, -pin_head_th])
+       cylinder(r= pin_dia/2, h = total_z + pin_head_th + pin_tail);
+      mirror([0,0,1])
+       cylinder(r= hinge_o_r - pin_gap, h = pin_head_th);
+    }
+    translate([0,0, total_z + pin_tail/2])
+      rotate([0,90,0])
+      translate([0,0, -pin_dia])
+      cylinder(r= pin_hole_dia/2, h=pin_dia*2);
+    translate([pin_dia/2 * cos(45), -50, -pin_head_th*2])
+      cube([50,100, total_z*2]);
+  }
+}
+
+module Pin(){ ////toplevel
+  rotate([0,90,0]) {
+    PinSitu();
+  }
+}
+
 module GeneralB(){ ////toplevel
   HalfClampX(true);
 }
@@ -283,9 +320,13 @@ module PlanDemo(){ ////toplevel
 //  translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA();
 }
 
+module DemoA(){ DummyA(); }
+
 module Demo(){ ////toplevel
   color("red") rotate([180,0,0]) GeneralB();
-  color("blue") DummyA();
+  color("blue") DemoA();
+  color("orange") translate([hinge_x, 0, min_z - hinge_z_gap])
+    rotate([0,0,180]) PinSitu();
 }
 
 //PlanDemo();