X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=scaffold-clamp-common.scad;h=cc5bad153206ffca5fdb94c8685e9bcd2de9dff8;hb=6a319b7ceeca0d02fbeac92c0737e976919d87a1;hp=3fee76b0e47af0d25c8b4fefc65865a01f434598;hpb=593b000b64faf2c6e5888cff8d91379c16aad171;p=reprap-play.git

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 3fee76b..cc5bad1 100644
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -10,7 +10,7 @@ pin_gap = 1.5; // around
 
 smooth_r = 15;
 
-bolt_dia = 5 + 0.75;
+bolt_dia = 5;
 bolt_flat = 10 + 1;
 
 nbolts = 2;
@@ -22,10 +22,21 @@ hinge_z_gap = 1;
 
 hinge_units = 4;
 
+bolt_gap = 1.0; // total, on both sides
+
 // ---------- vhook ----------
 
 vhook_th = 14;
 
+// ---------- cleat ----------
+
+cleat_frames = 10;
+cleat_curve_r = 200;
+cleat_horn_l = 60;
+cleat_horn_d_min = [8, 10];
+cleat_horn_d_max = [10, 12];
+cleat_height = 25;
+
 // ---------- hhook ----------
 
 hhook_inside = 40;
@@ -41,8 +52,12 @@ pin_tail = pin_hole_dia + pin_head_th + hinge_z_gap*3;
 
 // ========== calculated ==========
 
+TAU = PI*2;
+
 hole_dia = th + pin_gap;
 
+bolt_hole_r = (bolt_dia + bolt_gap)/2;
+
 main_r = tube_dia/2 + th;
 
 hinge_gap = pin_gap;
@@ -51,7 +66,7 @@ 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;
 
@@ -163,7 +178,7 @@ module HalfClampX(flatten=false){
       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);
@@ -191,7 +206,7 @@ module VHookHookMain(outer=false){ ////toplevel
     }
 }
 
-module VHookPartA(){ ////toplevel
+module VHookA(){ ////toplevel
   DummyA();
 
   translate([0, vhook_ctr, 0]){
@@ -232,6 +247,47 @@ module VHookPlanDemo(){
     }
 }
 
+// ---------- cleat ----------
+
+function cleat_frame_theta(s) = s * cleat_horn_l / cleat_curve_r * 360/TAU;
+function cleat_frame_z(s) = cleat_curve_r * (1 - cos(cleat_frame_theta(s)));
+function cleat_frame_x(s) = cleat_curve_r * sin(cleat_frame_theta(s));
+function cleat_frame_r(s) = ( cleat_horn_d_min * s +
+			      cleat_horn_d_max * (1-s) ) * 0.5;
+
+module CleatFrame(s) {
+  r = cleat_frame_r(s);
+  translate([cleat_frame_x(s), 0, cleat_frame_z(s)])
+    rotate([0, 90, 0])
+    scale([1, r[1]/r[0]])
+    sphere(r= r[0]);
+}
+
+
+module CleatHorn(){
+  for (si=[0 : cleat_frames-2]) {
+    s0 = si / (cleat_frames-1);
+    s1 = (si+1) / (cleat_frames-1);
+    //hull(){
+      CleatFrame(s0);
+      CleatFrame(s1);
+    //}
+  }
+}
+
+module VCleatA(){ ////toplevel
+  %DummyA();
+
+  translate([0, -(main_r + cleat_height), 0]) {
+    rotate([0, -90, 90]) {
+      for (m=[0,1]) {
+	mirror([m,0,0])
+	  CleatHorn();
+      }
+    }
+  }
+}
+
 // ---------- hhook ----------
 
 module HHookHookPlan(){
@@ -252,7 +308,7 @@ module HHookHookPlan(){
   }
 }
 
-module HHookPartA(){ ////toplevel
+module HHookA(){ ////toplevel
   DummyA();
   linextr(min_z, max_z) {
     HHookHookPlan();
@@ -316,9 +372,11 @@ 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();
 }