X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=poster-tube-lid.scad;h=3ef360d052afb0d51c97d61812ebc349cee039bf;hb=f3e2f78afea6dc15fa7ccaf5b2865a2dfb536147;hp=c4892cd368b4bb583a16f9a8a0013dc59de632e8;hpb=ca044a9801bccfd3025b75c51ba55047ed86887d;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index c4892cd..3ef360d 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -77,21 +77,22 @@ sm_bolt_y_over = 0.5;
 
 sm_closure_cnr = 3.0;
 
-catch_stalk_h = 4.5;
+catch_stalk_h = 5.0;
 catch_stalk_len = 50;
+catch_tip_th = 5;
 catch_head_th = 3;
 
 catch_pin_slop = 0.25; // each side, and above
-catch_pin_slop_x_extra = 0.0; // only on one side
+catch_pin_slop_x_extra = -0.55; // 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 = 15;
+catch_stalk_base_width = catch_stalk_h;
 
 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;
@@ -199,8 +200,6 @@ echo(bayo_polygon);
 
 // CATCH
 
-//cppy6 = -catch_strap_width * 2/3;
-
 cppxC = 0.41 * sm_inner_rad * TAU;
 
 // catch pin
@@ -214,6 +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);
@@ -239,13 +239,15 @@ cppD = cppC + [0,-1] * catch_strap_width;
 
 // catch assembly stalk and so on
 
+catch_cr3 = catch_cr + catch_stalk_h;
+
 cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
 cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
 cpp2r = cpp2 + [1,0] * catch_cr;
 cpp2d = cpp2 + [0,-1] * catch_cr;
-cpp3 = [ cpp2[0] + catch_cr * 2, cppd[1] - catch_cr ];
+cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
 cppA = [ -cppxC, cpp9[1] ];
 cppE = [ cppA[0], cppD[1] ];
 
@@ -564,7 +566,7 @@ module CatchAssemblyCoreProfile(){
   difference(){
     union(){
       hull(){
-	translate(cpp3) circle(r= catch_cr);
+	translate(cpp3) circle(r= catch_cr3);
 	polygon([ cpp3,
 		  cpp2r,
 		  cpp5,
@@ -609,7 +611,7 @@ module CatchAssemblyCoreProfile(){
 	    ]);
 }
 
-module CatchHeadProfile(){
+module CatchTipProfile(){
   intersection(){
     translate(cppF){
       difference(){
@@ -618,14 +620,17 @@ module CatchHeadProfile(){
       }
     }
     polygon([ cppa,
-	      cppg,
-	      cpph,
+	      cppi,
 	      cppd,
 	      cppc,
 	      cppb ]);
   }
+}
+
+module CatchHeadProfile(){
   polygon([ cppd,
-	    cppg,
+	    cppd,
+	    cppi,
 	    cppf,
 	    cppe,
 	    cpph ]);
@@ -636,6 +641,9 @@ module CatchCore(){ /////toplevel
   linear_extrude(height=catch_strap_thick, convexity=10)
     CatchAssemblyCoreProfile();
 
+  linear_extrude(height=catch_tip_th, convexity=10)
+    CatchTipProfile();
+
   linear_extrude(height=catch_head_th, convexity=10)
     CatchHeadProfile();