X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=scaffold-clamp-common.scad;h=3fee76b0e47af0d25c8b4fefc65865a01f434598;hb=593b000b64faf2c6e5888cff8d91379c16aad171;hp=590d08ca8d3ef415c07dad2f02f440f7b30020d6;hpb=785d87a73e57743b3547484c26840a6ecf0d3e59;p=reprap-play.git

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 590d08c..3fee76b 100644
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -13,6 +13,8 @@ smooth_r = 15;
 bolt_dia = 5 + 0.75;
 bolt_flat = 10 + 1;
 
+nbolts = 2;
+
 open_gap = 10;
 
 hinge_unit = 10;
@@ -20,14 +22,25 @@ hinge_z_gap = 1;
 
 hinge_units = 4;
 
-// vhook
+// ---------- vhook ----------
 
 vhook_th = 14;
 
+// ---------- hhook ----------
 
-// calculated
+hhook_inside = 40;
+hhook_th = 4;
+hhook_l = 40;
 
+// ========== 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;
 
 main_r = tube_dia/2 + th;
@@ -50,6 +63,8 @@ max_z = +total_z/2;
 
 pin_flatten = pin_dia/2 * (1 - cos(45));
 
+bolt_stride = total_z / nbolts;
+
 // calculated - vhook
 
 vhook_inside = 15;
@@ -60,6 +75,12 @@ vhook_y0 = -max(main_r, (tube_dia/2 + vhook_th));
 vhook_ctr = vhook_y0 - vhook_inside/2;
 vhook_outer_dia = vhook_inside + vhook_th*2;
 
+// calculated - hhook
+
+hhook_outer_dia = hhook_inside + hhook_th*2;
+
+hhook_ctr = -max(main_r + hhook_inside/2,
+		 tube_dia/2 + hhook_outer_dia/2);
 
 $fa = 3;
 $fs = 0.1;
@@ -138,8 +159,8 @@ 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);
@@ -151,22 +172,6 @@ module HalfClampX(flatten=false){
   }
 }
 
-module PlanDemo(){ ////toplevel
-  MainPlan();
-  translate([0,0,-4]) color("red") Portion(1);
-  translate([0,0,-2]) color("grey") Portion(0);
-
-  translate([0, tube_dia*1.5]) {
-    MainPlanB();
-    MainPlanA();
-  }
-
-  translate([0, -tube_dia*1.5]) {
-    VHookPlanDemo();
-  }
-//  translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA();
-}
-
 // ---------- vhook ----------
 
 module VHookProfile() {
@@ -219,7 +224,7 @@ module VHookPartA(){ ////toplevel
 }
 
 module VHookPlanDemo(){
-  VHookPlan();
+  MainPlanA();
   translate([0, vhook_ctr, 5])
     for (m=[0,1]) {
       mirror([0,m])
@@ -227,8 +232,63 @@ module VHookPlanDemo(){
     }
 }
 
+// ---------- hhook ----------
+
+module HHookHookPlan(){
+  translate([0, hhook_ctr]){
+    difference(){
+      circle(r = hhook_outer_dia/2);
+      circle(r = hhook_inside/2);
+      rectfromto([+hhook_outer_dia, -hhook_outer_dia],
+		 [0,                +hhook_outer_dia]);
+    }
+    translate([0, -(hhook_inside/2 + hhook_th/2)]){
+      hull(){
+	for (x=[-0.1, hhook_l]) {
+	  translate([x,0]) square(center=true, hhook_th);
+	}
+      }
+    }
+  }
+}
+
+module HHookPartA(){ ////toplevel
+  DummyA();
+  linextr(min_z, max_z) {
+    HHookHookPlan();
+  }
+}
+
+module HHookPlanDemo(){
+  MainPlanA();
+  HHookHookPlan();
+}
+
 // ---------- 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);
 }
@@ -237,9 +297,30 @@ module DummyA(){ ////toplevel
   HalfClampX();
 }
 
+module PlanDemo(){ ////toplevel
+  MainPlan();
+  translate([0,0,-4]) color("red") Portion(1);
+  translate([0,0,-2]) color("grey") Portion(0);
+
+  translate([0, tube_dia*1.5]) {
+    MainPlanB();
+    MainPlanA();
+  }
+
+  translate([0, -tube_dia*1.5]) {
+    VHookPlanDemo();
+  }
+  translate([tube_dia*4, 0]) {
+    HHookPlanDemo();
+  }
+//  translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA();
+}
+
 module Demo(){ ////toplevel
   color("red") rotate([180,0,0]) GeneralB();
   color("blue") DummyA();
+  color("orange") translate([hinge_x, 0, min_z - hinge_z_gap])
+    rotate([0,0,180]) PinSitu();
 }
 
 //PlanDemo();