poster-tube-lid: Add oring_compress_more (prompted by v7)

[reprap-play.git] / sealing-box.scad.m4

diff --git a/sealing-box.scad.m4 b/sealing-box.scad.m4
index 6f249386b9d94c2717f212b5c97057d184bf6b3d..dbfb220f9519b7535a4ec66f16a40ce6d588b30b 100644 (file)
--- a/sealing-box.scad.m4
+++ b/sealing-box.scad.m4
@@ -28,7 +28,8 @@
 //  $sealingbox_cnrrad
 
 $sealingbox_cnrrad = 10;
-$sealingbox_crude = 1;
+$sealingbox_crude = false;
+$sealingbox_inner_slop = 0.2;
 
 m4_define(`BoxLocals',`
   xbox = $sealingbox_sz[0];
@@ -41,14 +42,14 @@ m4_define(`BoxLocals',`
 
   xbox_lin = xbox - cnrrad*2;
   ybox_lin = ybox - cnrrad*2;
-
-  innertube = 1.0 + 0.2;
-  lidoverlap = 1.5;
-  lidoverhang = 6;
-  tubesealrad = 2.0;
 ')
 
-m4_define(`BoxFn',`$fn=($1) / $sealingbox_crude')
+m4_define(`innertube', `(1.0 + 0.2)')
+m4_define(`lidoverlap', `1.5')
+m4_define(`lidoverhang', `6')
+m4_define(`tubesealrad', `2.0')
+
+m4_define(`BoxFn',`$fn= $sealingbox_crude ? ($2) : ($1)')
 
 m4_dnl Box_Part($1=transl_x,$2=transl_y, $3=rot_z,$4=mirror_xy)
 m4_dnl          $5=kind, $6=kindargs, $7=profile(profileargsargs))
@@ -83,7 +84,7 @@ m4_define(`BoxPart_Extrude_Arc',`
         scale(500)
         mirror([($1)<0, 0,0])
         FArcSegment_mask($2);
-      rotate_extrude(convexity=10, $fs=1, BoxFn(36))
+      rotate_extrude(convexity=10, $fs=1, BoxFn(36,8))
         mirror([($1)<0, 0,0])
         translate([+($1),0,0]){
           $3
@@ -109,7 +110,7 @@ module SealingBox_WallProfile(){
   BoxLocals
   z = zbox - innertube - tubesealrad;
   translate([0, -0.1]) square([wall, z]);
-  translate([tubesealrad, z]) circle(r=tubesealrad, BoxFn(20));
+  translate([tubesealrad, z]) circle(r=tubesealrad, BoxFn(20,6));
 }
 
 module SealingBox_FloorProfile(){
@@ -117,27 +118,41 @@ 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)
-           circle(r= tubesealrad + innertube, BoxFn(20));
+           circle(r= tubesealrad + innertube, BoxFn(20,6));
        }
     }
   }
+  translate([tubesealrad*2 + $sealingbox_inner_slop,
+            zbox + ceilth]) {
+    mirror([0,1]) {
+      square([lidoverlap + innertube,
+             inner_buttress_h]);
+    }
+  }
 }
 
 module SealingBox_CeilProfile(){