X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=scaffold-clamp-common.scad;h=c16fbd8bce6dcb593b5101b543908aeb3d8af8f1;hb=3c1da07f2c510b741d2a83025220c7c1b70aab44;hp=843e05c18d25ed398ec3d2e6c791f23b08b2a32a;hpb=df4e53c99a5573eee956a297534c170da2a81808;p=reprap-play.git

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 843e05c..c16fbd8 100644
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -32,10 +32,11 @@ vhook_th = 14;
 
 cleat_frames = 10;
 cleat_curve_r = 200;
-cleat_horn_l = 60;
-cleat_horn_d_min = [8, 10];
-cleat_horn_d_max = [10, 12];
+cleat_horn_l = 40;
+cleat_horn_d_min = [10, 12];
+cleat_horn_d_max = [12, 14];
 cleat_height = 25;
+cleat_stem_l = 20;
 
 // ---------- hhook ----------
 
@@ -90,6 +91,14 @@ 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 - cleat
+
+cleat_horn_tl = cleat_horn_l + cleat_stem_l/2;
+
+vcleat_dz = max(0,
+		cleat_horn_tl + cleat_horn_d_min[0]/2 - total_z/2
+		);
+
 // calculated - hhook
 
 hhook_outer_dia = hhook_inside + hhook_th*2;
@@ -249,15 +258,22 @@ module VHookPlanDemo(){
 
 // ---------- cleat ----------
 
+function cleat_frame_theta(s) = s * cleat_horn_tl / 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 CleatFrameSphere(r) {
+  scale([1, r[1]/r[0], 1])
+    sphere(r= r[0]);
+}
+
 module CleatFrame(s) {
-  r = ( cleat_horn_d_min * s +
-	cleat_horn_d_max * (1-s) ) * 0.5;
-  translate([0,0, cleat_curve_r])
-    rotate( s * cleat_horn_l / cleat_curve_r * 360/TAU * [0,1,0] )
-    translate([0,0, -cleat_curve_r])
+  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]);
+    CleatFrameSphere(r);
 }
 
 
@@ -265,26 +281,55 @@ module CleatHorn(){
   for (si=[0 : cleat_frames-2]) {
     s0 = si / (cleat_frames-1);
     s1 = (si+1) / (cleat_frames-1);
-    //hull(){
+    hull(){
       CleatFrame(s0);
       CleatFrame(s1);
-    //}
+    }
   }
 }
 
-module VCleatA(){ ////toplevel
-  %DummyA();
+module CleatBase(){
+  frames = cleat_frames/2;
+  se = cleat_stem_l/2 / cleat_horn_tl;
+  r = cleat_frame_r(se);
+
+  hull(){
+    for (s = [-se, se]) {
+      for (z= [-(cleat_height + tube_dia/2),
+	       cleat_frame_z(s)]) {
+	translate([cleat_frame_x(s), 0, z])
+	  linear_extrude(height=0.1)
+	  scale([1, r[1]/r[0]])
+	  circle(r=r[0]);
+      }
+    }
+  }
+}
 
-  translate([0, -(main_r + cleat_height), 0]) {
-    rotate([0, -90, 90]) {
-      for (m=[0,1]) {
-	mirror([m,0,0])
-	  CleatHorn();
+module VCleat(){
+  translate([0,0, vcleat_dz]){
+    difference(){
+      translate([0, -(main_r + cleat_height), 0]) {
+	rotate([0, -90, 90]) {
+	  CleatBase();
+	  for (m=[0,1]) {
+	    mirror([m,0,0]) {
+	      CleatHorn();
+	    }
+	  }
+	}
       }
+      linextr(-cleat_stem_l, +cleat_stem_l)
+	circle(r = tube_dia/2 + 0.1);
     }
   }
 }
 
+module VCleatA(){ ////toplevel
+  DummyA();
+  VCleat();
+}
+
 // ---------- hhook ----------
 
 module HHookHookPlan(){
@@ -378,5 +423,12 @@ module Demo(){ ////toplevel
     rotate([0,0,180]) PinSitu();
 }
 
+module DemoPair(){ ////toplevel
+  color("red") rotate([180,0,0]) DemoA();
+  color("blue") DemoA();
+  color("orange") translate([hinge_x, 0, min_z - hinge_z_gap])
+    rotate([0,0,180]) PinSitu();
+}
+
 //PlanDemo();
 //HalfClamp();