X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=poster-tube-lid.scad;h=79dc6ea8e7f278a6457e10bca6d51e110fca6c09;hb=e35c35d79348f9195b2b52042800bf90329e3d05;hp=bc2b74f2fdb643cdd799546e69fb5a827e3dc64e;hpb=4bd11a84c9d8c3be6a10a45f4b60b84fc320af67;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index bc2b74f..79dc6ea 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -3,6 +3,7 @@
 main_dia = 71.2 + 0.50 - 2.26;
 top_minthick_middle = 4;
 top_minthick_by_oring = 2.5;
+top_middle_dr = 11;
 
 main_cnr = 4.0;
 
@@ -67,6 +68,8 @@ top_thick = max(top_minthick_middle,
 
 top_z = top_thick + seal_thick;
 
+middle_bot_z = top_z - top_minthick_middle;
+
 bayo_entry = bayo_behind / 3.0;
 bayo_top_z = bayo_behind + rivet_thick + bayo_above_gap;
 bayo_entry_ramp = bayo_entry + bayo_interf;
@@ -130,14 +133,15 @@ module MainProfile(){
 	  square([10,10]);
 	}
       }
-      polygon([[ -11,                   seal_thick        ],
-	       [ -11,                   top_z             ],
+      polygon([[ -top_middle_dr,        middle_bot_z      ],
+	       [ -top_middle_dr,        top_z             ],
 	       [ main_cnr_pos[0],       top_z             ],
 	       [ side_thick,            main_cnr_pos[1]   ],
 	       [ side_thick,            -side_height      ],
 	       [ side_taper,            -side_height      ],
 	       [ 0,                     -rivet_posn       ],
 	       [ 0,                     seal_thick        ],
+	       [ -oring_x_rad,          seal_thick        ],
 	       ],
 	      convexity=10);
     }
@@ -199,8 +203,8 @@ module Cover(){ ////toplevel
       rotate_extrude(convexity=10)
 	translate([main_dia/2, 0])
 	MainProfile();
-      translate([0,0, seal_thick])
-	cylinder(h= top_thick, r = main_dia/2 - 10);
+      translate([0,0, middle_bot_z])
+	cylinder(h= top_minthick_middle, r = main_dia/2 - top_middle_dr + 1);
     }
     for (r=[0,180])
       rotate([0,0, r])
@@ -209,7 +213,7 @@ module Cover(){ ////toplevel
     for (r=[0 : 60 : 179]) {
       rotate([0,0, r]) {
 	height = top_thick - brace_above_below*2;
-	translate([0,0, seal_thick + brace_above_below + height/2 ])
+	translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 	cube(center=true, [ oring_bore - brace_end_shorter,
 			    brace_hole_width, height ]);
       }