X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=poster-tube-lid.scad;h=d0986c97801ba32b58a3ea815b10a3f45fc097cb;hb=8ceea8f9acc75b2de6a7fe879f5b3701cb5ecf2b;hp=79dc6ea8e7f278a6457e10bca6d51e110fca6c09;hpb=e35c35d79348f9195b2b52042800bf90329e3d05;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 79dc6ea..d0986c9 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -1,18 +1,22 @@
 // -*- C -*-
 
+coarse = false;
+
 main_dia = 71.2 + 0.50 - 2.26;
-top_minthick_middle = 4;
-top_minthick_by_oring = 2.5;
+top_thick_middle = 4;
+top_thick_by_oring = 3.0;
 top_middle_dr = 11;
 
-main_cnr = 4.0;
+main_cnr = 6.0;
+
+min_wall = 4;
 
 rivet_posn = 6.0;
 rivet_thick = 1.67;
 rivet_width = 4.15 + 1.0;
-rivet_tall = 5.51 + 0.49;
+rivet_tall = 5.51 + 1.49;
 
-over_rivet_wall = 0.5;
+over_rivet_wall = 1.0;
 side_rivet_gap = 1.5;
 
 bayo_interf = 1.25;
@@ -24,7 +28,11 @@ oring_thick = 5.0;
 oring_bore = 62.0;
 
 oring_upper_embed_angle = 80;
-oring_compress = 0.1; // proportion
+oring_compress = 0.05; // proportion
+
+oring_rm_beside = 8;
+oring_rm_scale = 2.0;
+oring_rm_angle = 20;
 
 side_taper = 1.0;
 
@@ -32,7 +40,7 @@ bayo_above_gap = 1.0;
 
 bayo_entry = bayo_behind/3;
 
-bayo_slice_size = 1;
+bayo_slice_size = coarse ? 5 : 1;
 
 brace_hole_width = 1.0;
 brace_above_below = 1.2;
@@ -58,17 +66,14 @@ oring_oblate = (1 - oring_compress);
 oring_y_rad = oring_thick/2 * oring_oblate;
 oring_x_rad = oring_thick/2 / oring_oblate;
 
-seal_thick = oring_y_rad * (1 + cos(oring_upper_embed_angle));
+by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle));
 
 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 side_thick = rivet_tall + over_rivet_wall;
 
-top_thick = max(top_minthick_middle,
-		top_minthick_by_oring + oring_y_rad);
+top_z = top_thick_by_oring + oring_y_rad + by_oring_z;
 
-top_z = top_thick + seal_thick;
-
-middle_bot_z = top_z - top_minthick_middle;
+middle_bot_z = top_z - top_thick_middle;
 
 bayo_entry = bayo_behind / 3.0;
 bayo_top_z = bayo_behind + rivet_thick + bayo_above_gap;
@@ -78,8 +83,10 @@ rivet_entry_width = rivet_width + side_rivet_gap;
 
 jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
 
-$fs=0.5;
-$fa=1;
+handling_dia = oring_bore + oring_thick*2 + min_wall*2;
+
+$fs= coarse ? 2.5 : 0.5;
+$fa= coarse ? 5 : 1;
 
 // bayonet definition
 
@@ -140,8 +147,8 @@ module MainProfile(){
 	       [ side_thick,            -side_height      ],
 	       [ side_taper,            -side_height      ],
 	       [ 0,                     -rivet_posn       ],
-	       [ 0,                     seal_thick        ],
-	       [ -oring_x_rad,          seal_thick        ],
+	       [ 0,                     by_oring_z        ],
+	       [ -oring_x_rad,          by_oring_z        ],
 	       ],
 	      convexity=10);
     }
@@ -156,6 +163,10 @@ module MainProfile(){
   }
 }
 
+module HandlingProfile(){
+//  translate([
+}
+
 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
   // nom_rad > real_rad
   rotate([0,0, atan2(offset, nom_rad) ]){
@@ -189,6 +200,7 @@ module BayonetCutout(){
   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
 		main_dia/2 + side_thick, 
 		main_dia/2 + rivet_tall)
+    translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
     polygon(bayo_polygon, convexity=10);
 }
 
@@ -197,22 +209,47 @@ module ProfilesDemo(){ ////toplevel
   translate([+10,0]) polygon(bayo_polygon, convexity=10);
 }
 
+module LimitForHandling(){ ////toplevel
+  for (r=[0,180])
+    rotate([0,0,r]) {
+      
+    }
+  hull() rotate_extrude(){
+    translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
+      circle(r = main_cnr);
+      mirror([0,1]) square([ main_cnr, 50 ]);
+    }
+  }
+  //cylinder(r= handling_dia/2, h=20);
+}
+
 module Cover(){ ////toplevel
   render() difference(){
-    union(){
-      rotate_extrude(convexity=10)
-	translate([main_dia/2, 0])
-	MainProfile();
-      translate([0,0, middle_bot_z])
-	cylinder(h= top_minthick_middle, r = main_dia/2 - top_middle_dr + 1);
+    intersection(){
+      union(){
+	rotate_extrude(convexity=10)
+	  translate([main_dia/2, 0])
+	  MainProfile();
+	translate([0,0, middle_bot_z])
+	  cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
+      }
+      %LimitForHandling();
     }
-    for (r=[0,180])
+    for (r=[0,180]){
       rotate([0,0, r])
 	translate([0,0, -side_height])
 	BayonetCutout();
+      rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
+	translate([0,
+		   oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
+		   oring_y_rad * 1.5])
+	rotate([-oring_rm_angle, 0, 0])
+	mirror([0,0,1])
+	cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
+    }
     for (r=[0 : 60 : 179]) {
       rotate([0,0, r]) {
-	height = top_thick - brace_above_below*2;
+	height = top_thick_middle - brace_above_below*2;
 	translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 	cube(center=true, [ oring_bore - brace_end_shorter,
 			    brace_hole_width, height ]);
@@ -255,8 +292,13 @@ module CoverTest2(){ ////toplevel
 module CoverTest1(){ ////toplevel
   difference(){
     CoverTest2();
-    translate([0,0, -10])
-      cube([ main_dia*3, main_dia * .85, 20], center=true);
+    for (r= [ 40, 147 ]){
+      rotate([0,0, r]){
+	translate([0,0, -10]) {
+	  cube([ main_dia*3, main_dia * .55, 18], center=true);
+	}
+      }
+    }
   }
 }