X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;ds=sidebyside;f=poster-tube-lid.scad;h=a354a4c3d06fc9254e3c5805d0c716a52236dc06;hb=84417632775576b267c97545106bc682e098b56c;hp=13109789c6d1ba57adc75e0bea86d7699adf2052;hpb=a1f56c883708cae9567d48454e2a866ee654eaed;p=reprap-play.git

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 1310978..a354a4c 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -11,18 +11,19 @@ main_cnr = 6.0;
 
 min_wall = 3;
 
-rivet_posn = 6.0 + 0.5;
+rivet_posn = 6.0 + 0.1;
 rivet_thick = 1.67;
 rivet_width = 4.15 + 1.0;
 rivet_tall = 5.51 + 1.49;
 
 over_rivet_wall = 1.0;
 side_rivet_gap = 1.5;
+inside_rivet_gap = 1.5;
 
-bayo_interf = 1.25;
+bayo_interf = 0.44;
 bayo_behind = 3.5;
 bayo_interf_width = 2.0;
-bayo_interf_slope = 0.75;
+bayo_interf_slope = 0.5;
 
 oring_thick = 5.0;
 oring_bore = 62.0;
@@ -36,7 +37,7 @@ oring_rm_angle = 20;
 
 side_taper = 1.0;
 
-bayo_gap = 1.0 + 1.67;
+bayo_gap = 6.0;
 
 bayo_entry = bayo_behind/3;
 
@@ -51,8 +52,31 @@ jig_hole_dia = 3.0;
 jig_rim = 5;
 jig_mark = 5;
 
+strap_hoop_thick = 6;
+strap_hoop_inside = 10;
+strap_hoop_strlen = 10;
+strap_hoop_elevation = 45;
+
+sm_inner_circum = 239;
+sm_main_thick = 2.5;
+sm_main_width = 25;
+
+sm_bolt_dia = 3.5;
+sm_bolt_shaft = 21.9;
+sm_bolt_head_dia = 6.94 + 1.0;
+sm_bolt_head_thick = 2.14;
+sm_bolt_nut_width = 5.89 + 0.25;
+sm_bolt_nut_thick = 3.68;
+
+sm_bolt_y_clear = 0.5;
+sm_bolt_y_over = 0.5;
+
+sm_closure_cnr = 3.0;
+
 // calculated
 
+TAU = PI*2;
+
 bayo_entry_x = bayo_entry;
 bayo_entry_z = bayo_entry;
 bayo_inramp_x = bayo_entry;
@@ -77,7 +101,6 @@ middle_bot_z = top_z - top_thick_middle;
 
 bayo_entry = bayo_behind / 3.0;
 bayo_top_z = bayo_behind + bayo_gap;
-bayo_entry_ramp = bayo_entry + bayo_interf;
 
 rivet_entry_width = rivet_width + side_rivet_gap;
 
@@ -86,6 +109,19 @@ jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
 handling_dia = oring_bore + oring_thick*2 + min_wall*2;
 handling_angle = 45;
 
+sm_inner_rad = sm_inner_circum / TAU;
+sm_outer_rad = sm_inner_rad + sm_main_thick;
+
+smc_pos = [ 0, sm_inner_rad, 0 ];
+
+smc_bolt_nut_dia = sm_bolt_nut_width / cos(30);
+
+smc_bolt_y = sm_bolt_dia/2 + sm_bolt_y_clear;
+smc_max_y = smc_bolt_y + sm_bolt_y_over
+  + max(sm_bolt_head_dia/2, smc_bolt_nut_dia/2);
+smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
+  + max(sm_bolt_head_thick, sm_bolt_nut_thick);
+
 $fs= coarse ? 2.5 : 0.5;
 $fa= coarse ? 5 : 1;
 
@@ -98,7 +134,7 @@ bayo_m = [ bayo_inramp_x, bayo_behind ];
 bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope,  1 ];
 bayo_k = bayo_l + [ bayo_interf_width, 0 ];
 bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ];
-bayo_i = bayo_j + [ rivet_width, 0 ];
+bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ];
 bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ];
 bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ];
 
@@ -163,6 +199,38 @@ module MainProfile(){
   }
 }
 
+module StrapHoopProfile(){
+  circle(r = strap_hoop_thick/2);
+}
+
+module StrapHoop(){ ////toplevel
+  bigrad = strap_hoop_inside/2 + strap_hoop_thick/2;
+  extralen = strap_hoop_thick * 5;
+
+  intersection(){
+    rotate([strap_hoop_elevation, 0,0]){
+      for (x= [ -1, +1 ] * bigrad) {
+	translate([x, -extralen, 0])
+	  rotate([-90,0,0])
+	  linear_extrude(height= extralen + strap_hoop_strlen + 0.1,
+			 convexity=10)
+	  StrapHoopProfile();
+      }
+      translate([0, strap_hoop_strlen, 0]){
+	intersection(){
+	  rotate_extrude(convexity=10)
+	    translate([bigrad, 0,0])
+	    StrapHoopProfile();
+	  translate([0,50,0])
+	    cube([100,100,100], center=true);
+	}
+      }
+    }
+    translate([0, 50, 0])
+      cube(100, center=true);
+  }
+}
+
 module HandlingProfile(){
 //  translate([
 }
@@ -268,6 +336,10 @@ module Cover(){ ////toplevel
       }
     }
   }
+//  translate(strap_hoop_thick * [-0.5, 0, +1])
+//    translate([handling_dia/2, 0, -side_height])
+//    rotate([0,180,0]) rotate([0,0,90])
+//    StrapHoop();
 }
 
 module SavingHole(){
@@ -304,13 +376,65 @@ module CoverTest2(){ ////toplevel
 module CoverTest1(){ ////toplevel
   difference(){
     CoverTest2();
-    for (r= [ 40, 147 ]){
-      rotate([0,0, r]){
-	translate([0,0, -10]) {
-	  cube([ main_dia*3, main_dia * .55, 18], center=true);
+    difference(){
+      for (r= [ 40, 147 ]){
+	rotate([0,0, r]){
+	  translate([0,0, -10]) {
+	    cube([ main_dia*3, main_dia * .53, 18], center=true);
+	  }
 	}
       }
+//      translate([ 50, 0, 0 ])
+//	cube([ 100,
+//	       strap_hoop_inside + strap_hoop_thick*2 + 1,
+//	       100 ],
+//	     center=true);
+    }
+  }
+}
+
+module StrapMountBolt(l_delta){ ///toplevel
+  // positioned relative to smc_pos
+  translate([(sm_bolt_nut_thick - sm_bolt_head_thick)/2,
+	     smc_bolt_y,
+	     sm_main_width/2]){
+    translate([ -sm_bolt_shaft/2-1, 0,0 ]){
+      rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
+    }
+    translate([ -sm_bolt_shaft/2, 0,0 ])
+      rotate([0,-90,0])
+      cylinder($fn=6, r=smc_bolt_nut_dia/2, h=sm_bolt_nut_thick + l_delta);
+    translate([ sm_bolt_shaft/2, 0,0 ])
+      rotate([0,90,0])
+      cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
+  }
+}
+
+module StrapMountProtrusion(half_x, max_y){
+  translate(smc_pos){
+    linear_extrude(height=sm_main_width, convexity=10){
+      hull(){
+	for (m = [0,1]) mirror([m,0,0]) {
+	  translate([-(half_x - sm_closure_cnr), max_y - sm_closure_cnr])
+	    circle(r=sm_closure_cnr);
+	  translate([-half_x, -sm_inner_rad])
+	    square([1,1]);
+	}
+      }
+    }
+  }
+}
+
+module StrapMount(){ ////toplevel
+  difference(){
+    union(){
+      cylinder(r=sm_outer_rad, h=sm_main_width);
+      StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr, smc_max_y);
     }
+    translate([0,0,-1])
+      cylinder(r=sm_inner_rad, h=sm_main_width+2);
+    translate(smc_pos)
+      StrapMountBolt(10);
   }
 }