scaffold-clamp-cleat: wip

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 77f138846f825443f644d6901244ff33595157ec..c309c004d9568a16264bc29fc91f4a0a2327ec50 100644 (file)
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -32,9 +32,9 @@ 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;
 
@@ -91,6 +91,10 @@ 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;
+
 // calculated - hhook
 
 hhook_outer_dia = hhook_inside + hhook_th*2;
@@ -250,7 +254,7 @@ module VHookPlanDemo(){
 
 // ---------- cleat ----------
 
-function cleat_frame_theta(s) = s * cleat_horn_l / cleat_curve_r * 360/TAU;
+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 +
@@ -273,38 +277,29 @@ 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 CleatBase(){
   frames = cleat_frames/2;
-  se = cleat_stem_l/2 / cleat_horn_l;
+  se = cleat_stem_l/2 / cleat_horn_tl;
   r = cleat_frame_r(se);
 
-  for (si=[0: frames-2]) {
-    s0 = se * si / (frames-1);
-    s1 = se * (si+1) / (frames-1);
-    hull(){
+  hull(){
+    for (s = [-se, se]) {
       for (z= [-(cleat_height + tube_dia/2),
-              cleat_frame_z(se)]) {
-       translate([cleat_frame_x(se), 0, z])
-         CleatFrameSphere(r);
+              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]);
       }
     }
   }
-
-  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
@@ -312,13 +307,11 @@ module VCleatA(){ ////toplevel
 
   translate([0, -(main_r + cleat_height), 0]) {
     rotate([0, -90, 90]) {
+      CleatBase();
       for (m=[0,1]) {
        mirror([m,0,0]) {
          CleatHorn();
        }
-       mirror([m,0,0]) {
-         CleatBase();
-       }
       }
     }
   }