X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=poster-tube-lid.scad;h=08127cde3bd7f137113fe1c0e384a143b9e21f1a;hb=2132efba59634024b51ec9c19eb40a490081cfc9;hp=fdaf3bfdd675a69574d499518787dc18abca9d88;hpb=6c923cc19bbb86324212ceb4a8937da1febab7db;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index fdaf3bf..08127cd 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -77,17 +77,18 @@ sm_bolt_y_over = 0.5;
 
 sm_closure_cnr = 3.0;
 
-catch_stalk_h = 5.0;
+catch_stalk_h = 4.5;
 catch_stalk_len = 50;
+catch_tip_th = 4;
 catch_head_th = 3;
 
 catch_pin_slop = 0.25; // each side, and above
-catch_pin_slop_x_extra = -0.55; // only on one side
+catch_pin_slop_x_extra = 0.0; // only on one side
 catch_stalk_above_gap = 1.5;
 catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
 
 catch_strap_width = 12;
-catch_stalk_base_width = catch_stalk_h;
+catch_stalk_base_width = 15;
 
 catch_knob_dia = 6;
 catch_knob_above_gap = 5;
@@ -212,6 +213,7 @@ cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 cppd = [ bayo_n[0]
 	 - catch_pin_slop - catch_pin_slop_x_extra,
 	 -catch_stalk_above_gap ];
+cppi = [ cppa[0], cppd[1] ];
 cppc = [ cppd[0], cppb[1] ];
 cpph = cppd + [0,-1] * catch_stalk_h;
 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
@@ -609,7 +611,8 @@ module CatchAssemblyCoreProfile(){
 	    ]);
 }
 
-module CatchHeadProfile(){
+module CatchTipProfile(dy){
+  ddy = [0,dy];
   intersection(){
     translate(cppF){
       difference(){
@@ -618,14 +621,17 @@ module CatchHeadProfile(){
       }
     }
     polygon([ cppa,
-	      cppg,
-	      cpph,
-	      cppd,
+	      cppi + ddy,
+	      cppd + ddy,
 	      cppc,
 	      cppb ]);
   }
+}
+
+module CatchHeadProfile(){
   polygon([ cppd,
-	    cppg,
+	    cppd,
+	    cppi,
 	    cppf,
 	    cppe,
 	    cpph ]);
@@ -636,6 +642,13 @@ module CatchCore(){ /////toplevel
   linear_extrude(height=catch_strap_thick, convexity=10)
     CatchAssemblyCoreProfile();
 
+  hull(){
+    linear_extrude(height=catch_head_th, convexity=10)
+      CatchTipProfile(0);
+    linear_extrude(height=catch_tip_th, convexity=10)
+      CatchTipProfile(catch_tip_th - catch_head_th);
+  }
+
   linear_extrude(height=catch_head_th, convexity=10)
     CatchHeadProfile();