X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=poster-tube-lid.scad;h=526f7ea6a89ad136db79cc052b17d2cb00aa317a;hp=58622bcbe98fe8881cdf62baf9de5166092b1cc2;hb=87da6b24773fbbb33640a6ddfe2432b0d1aea8a3;hpb=a96c0cd825873b843abb394fd7c6ecb77e4dd111 diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index 58622bc..526f7ea 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -1,25 +1,32 @@ // -*- C -*- -main_dia = 71.2 + 0.50; -top_thick = 4; +coarse = false; -main_cnr = 4.0; +main_dia = 71.2 + 0.50 - 2.26; +top_thick_middle = 4; +top_thick_by_oring = 3.0; +top_middle_dr = 11; + +main_cnr = 6.0; rivet_posn = 6.0; rivet_thick = 1.67; rivet_width = 4.15 + 1.0; rivet_tall = 5.51 + 0.49; -over_rivet_wall = 0.5; +over_rivet_wall = 1.0; side_rivet_gap = 1.5; -bayo_interf = 0.75; +bayo_interf = 1.25; 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 = 80; +oring_compress = 0.1; // proportion side_taper = 1.0; @@ -27,12 +34,13 @@ 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; +brace_end_shorter = 0.3; -jig_thick = 1.0; +jig_thick = 1.4; jig_hole_dia = 3.0; jig_rim = 5; jig_mark = 5; @@ -44,10 +52,22 @@ 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; + +oring_oblate = (1 - oring_compress); + +oring_y_rad = oring_thick/2 * oring_oblate; +oring_x_rad = oring_thick/2 / oring_oblate; + +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_z = top_thick + seal_thick; +top_z = top_thick_by_oring + oring_y_rad + by_oring_z; + +middle_bot_z = top_z - top_thick_middle; bayo_entry = bayo_behind / 3.0; bayo_top_z = bayo_behind + rivet_thick + bayo_above_gap; @@ -57,8 +77,8 @@ rivet_entry_width = rivet_width + side_rivet_gap; jig_mark_rad = jig_mark + main_dia/2 + jig_thick; -$fs=0.5; -$fa=1; +$fs= coarse ? 2.5 : 0.5; +$fa= coarse ? 5 : 1; // bayonet definition @@ -70,7 +90,8 @@ 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_h = [ bayo_i[0], bayo_behind + rivet_thick + bayo_above_gap ]; +bayo_h = [ bayo_i[0], bayo_behind + rivet_thick + + bayo_above_gap + bayo_interf ]; bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ]; bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0]; @@ -100,26 +121,38 @@ echo(bayo_polygon); module MainProfile(){ main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr; - translate(main_cnr_pos){ - intersection(){ - difference(){ - circle(r = main_cnr); - circle(r = main_cnr * 0.5); + difference(){ + union(){ + translate(main_cnr_pos){ + intersection(){ + difference(){ + circle(r = main_cnr); + circle(r = main_cnr * 0.5); + } + square([10,10]); + } } - square([10,10]); + polygon([[ -top_middle_dr, middle_bot_z ], + [ -top_middle_dr, top_z ], + [ main_cnr_pos[0], top_z ], + [ side_thick, main_cnr_pos[1] ], + [ side_thick, -side_height ], + [ side_taper, -side_height ], + [ 0, -rivet_posn ], + [ 0, by_oring_z ], + [ -oring_x_rad, by_oring_z ], + ], + convexity=10); + } + translate([ oring_mid_dia/2 - main_dia/2, 0 ]) + hull(){ + translate([ 0, oring_y_rad ]) + scale([ 1/oring_oblate, oring_oblate ]) + circle(oring_thick/2); + translate([ 0, oring_y_rad*2 - oring_thick/2 ]) + circle(oring_thick/2); } } - polygon([[ -1, seal_thick ], - [ -1, top_z ], - [ main_cnr_pos[0], top_z ], - [ side_thick, main_cnr_pos[1] ], - [ side_thick, -side_height ], - [ side_taper, -side_height ], - [ 0, -rivet_posn ], - [ 0, -(seal_recess[0] + seal_recess[1]) ], - [ seal_recess[0], -(seal_recess[0]) ], - [ seal_recess[0], seal_thick ], - ]); } module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){ @@ -155,22 +188,22 @@ module BayonetCutout(){ RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size, main_dia/2 + side_thick, main_dia/2 + rivet_tall) - polygon(bayo_polygon); + polygon(bayo_polygon, convexity=10); } -module ProfilesDemo(){ - translate([-20,0]) MainProfile(); - polygon(bayo_polygon); +module ProfilesDemo(){ ////toplevel + translate([-10,0]) MainProfile(); + translate([+10,0]) polygon(bayo_polygon, convexity=10); } module Cover(){ ////toplevel - difference(){ + render() difference(){ union(){ - rotate_extrude() + rotate_extrude(convexity=10) translate([main_dia/2, 0]) MainProfile(); - translate([0,0, seal_thick]) - cylinder(h= top_thick, r = main_dia/2); + translate([0,0, middle_bot_z]) + cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1); } for (r=[0,180]) rotate([0,0, r]) @@ -178,9 +211,10 @@ module Cover(){ ////toplevel BayonetCutout(); for (r=[0 : 60 : 179]) { rotate([0,0, r]) { - height = top_thick - brace_above_below*2; - translate([0,0, seal_thick + brace_above_below + height/2 ]) - cube(center=true, [ main_dia, brace_hole_width, height ]); + 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 ]); } } } @@ -210,16 +244,29 @@ module Jig(){ ////toplevel } } -module CoverTest(){ ////toplevel +module CoverTest2(){ ////toplevel difference(){ Cover(); SavingHole(); } } +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); + } + } + } + } +} + //ProfilesDemo(); //BayonetCutout(); //MainProfile(); //Cover(); //Jig(); -render() CoverTest(); +//CoverTest();