poster-tube-lid: convert to oring: introduce vars, and calculate seal_thick

[reprap-play.git] / poster-tube-lid.scad

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 44ec3aac5ae26e3eb52cf3bfdc2332e2cfa78fac..4ea02d9fdf16f3d04c91f056906803ac33041fcd 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -1,6 +1,6 @@
 // -*- C -*-
 
-main_dia = 71.2 + 0.50;
+main_dia = 71.2 + 0.50 - 2.26;
 top_thick = 4;
 
 main_cnr = 4.0;
@@ -18,9 +18,14 @@ bayo_behind = 3.5;
 bayo_interf_width = 2.0;
 bayo_interf_slope = 0.75;
 
-seal_thick = 0.1;
 seal_recess = [ 2.0, 2.0 ]; // recess depth, recess height
 
+oring_thick = 5.0;
+oring_bore = 62.0;
+
+oring_upper_embed_angle = 45;
+oring_compress = 0.1; // proportion
+
 side_taper = 1.0;
 
 bayo_above_gap = 1.0;
@@ -32,7 +37,7 @@ bayo_slice_size = 1;
 brace_hole_width = 1.0;
 brace_above_below = 1.2;
 
-jig_thick = 1.0;
+jig_thick = 1.4;
 jig_hole_dia = 3.0;
 jig_rim = 5;
 jig_mark = 5;
@@ -44,6 +49,12 @@ bayo_entry_z = bayo_entry;
 bayo_inramp_x = bayo_entry;
 bayo_inramp_z = bayo_entry;
 
+oring_mid_dia = oring_bore + oring_thick;
+oring_outer_dia = oring_mid_dia + oring_thick;
+
+seal_thick = (1 - oring_compress) * oring_thick/2
+  * (1 + cos(oring_upper_embed_angle));
+
 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 side_thick = rivet_tall + over_rivet_wall;
 
@@ -159,7 +170,7 @@ module BayonetCutout(){
     polygon(bayo_polygon, convexity=10);
 }
 
-module ProfilesDemo(){
+module ProfilesDemo(){ ////toplevel
   translate([-20,0]) MainProfile();
   polygon(bayo_polygon, convexity=10);
 }