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poster-tube-lid: convert to oring: introduce vars, and calculate seal_thick
author
Ian Jackson
<ijackson@chiark.greenend.org.uk>
Mon, 9 Oct 2017 00:53:04 +0000
(
01:53
+0100)
committer
Ian Jackson
<ijackson@chiark.greenend.org.uk>
Mon, 9 Oct 2017 00:53:04 +0000
(
01:53
+0100)
poster-tube-lid.scad
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diff --git
a/poster-tube-lid.scad
b/poster-tube-lid.scad
index 93577660b677b8ffe7bceb31cd5b94aeb4664cab..4ea02d9fdf16f3d04c91f056906803ac33041fcd 100644
(file)
--- a/
poster-tube-lid.scad
+++ b/
poster-tube-lid.scad
@@
-18,9
+18,14
@@
bayo_behind = 3.5;
bayo_interf_width = 2.0;
bayo_interf_slope = 0.75;
bayo_interf_width = 2.0;
bayo_interf_slope = 0.75;
-seal_thick = 0.1;
seal_recess = [ 2.0, 2.0 ]; // recess depth, recess height
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;
side_taper = 1.0;
bayo_above_gap = 1.0;
@@
-44,6
+49,12
@@
bayo_entry_z = bayo_entry;
bayo_inramp_x = bayo_entry;
bayo_inramp_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;
side_height = rivet_posn + bayo_behind + rivet_thick/2;
side_thick = rivet_tall + over_rivet_wall;