X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=sealing-box.scad.m4;h=dbfb220f9519b7535a4ec66f16a40ce6d588b30b;hp=b821dc0caa288eceb9b4598b4e25cce99df0954a;hb=9f21563a34c99c15c3adcd2a72ab0da7cf741bbe;hpb=2989133828e6ada0e4983666dd47f7a6c8538eb9

diff --git a/sealing-box.scad.m4 b/sealing-box.scad.m4
index b821dc0..dbfb220 100644
--- a/sealing-box.scad.m4
+++ b/sealing-box.scad.m4
@@ -29,6 +29,7 @@
 
 $sealingbox_cnrrad = 10;
 $sealingbox_crude = false;
+$sealingbox_inner_slop = 0.2;
 
 m4_define(`BoxLocals',`
   xbox = $sealingbox_sz[0];
@@ -117,20 +118,27 @@ module SealingBox_FloorProfile(){
   mirror([0,1]) square([wall, floorth]);
 }
 
+function SealingBox_lidbigger() = lidoverlap + innertube;
+
 module SealingBox_LidProfile(){
   BoxLocals
   rad = tubesealrad + innertube;
   morex = wall;
+  inner_buttress_h = tubesealrad*1.5 + innertube + ceilth;
+
   difference(){
-    translate([-lidoverlap - innertube,
-	       zbox - lidoverhang - innertube])
-      square([lidoverlap + innertube + wall,
+    translate([0, zbox + ceilth]) mirror([0,1]) {
+      translate([-SealingBox_lidbigger(),
+		 0])
+      square([lidoverlap + innertube + tubesealrad,
 	      lidoverhang + innertube + ceilth]);
+      square([tubesealrad*2 + innertube + lidoverlap,
+	      inner_buttress_h]);
+    }
     hull(){
       translate([tubesealrad,
 		 zbox - innertube - tubesealrad])
 	for (t=[ [0,0],
-		 [morex*2, 0],
 		 [0, -zbox]
 		 ]) {
 	  translate(t)
@@ -138,6 +146,13 @@ module SealingBox_LidProfile(){
 	}
     }
   }
+  translate([tubesealrad*2 + $sealingbox_inner_slop,
+	     zbox + ceilth]) {
+    mirror([0,1]) {
+      square([lidoverlap + innertube,
+	      inner_buttress_h]);
+    }
+  }
 }
 
 module SealingBox_CeilProfile(){