X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=poster-tube-lid.scad;h=08127cde3bd7f137113fe1c0e384a143b9e21f1a;hb=6a319b7ceeca0d02fbeac92c0737e976919d87a1;hp=d4210a2d5d298e40bb70badfecf1eab2c8d21676;hpb=9d27f71901e810cf87975ab5e51ffda0c9a58911;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index d4210a2..08127cd 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -79,6 +79,7 @@ sm_closure_cnr = 3.0;
 
 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
@@ -87,11 +88,11 @@ 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;
-catch_knob_height = 5;
+catch_knob_height = 3.0;
 
 catch_stalk_below_gap = 1.0;
 catch_stalk_beside_gap = 2.0;
@@ -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();