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=b2c659016ac37c325d6f26b19b3a233094062bff;hb=87da6b24773fbbb33640a6ddfe2432b0d1aea8a3;hpb=78073d9e7b062f5f821ee86a26ee786955b4cf47 diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index b2c6590..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; @@ -27,7 +34,16 @@ bayo_above_gap = 1.0; bayo_entry = bayo_behind/3; -bayo_slice_size = 10; +bayo_slice_size = coarse ? 5 : 1; + +brace_hole_width = 1.0; +brace_above_below = 1.2; +brace_end_shorter = 0.3; + +jig_thick = 1.4; +jig_hole_dia = 3.0; +jig_rim = 5; +jig_mark = 5; // calculated @@ -36,10 +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; @@ -47,8 +75,10 @@ bayo_entry_ramp = bayo_entry + bayo_interf; rivet_entry_width = rivet_width + side_rivet_gap; -$fs=0.5; -$fa=1; +jig_mark_rad = jig_mark + main_dia/2 + jig_thick; + +$fs= coarse ? 2.5 : 0.5; +$fa= coarse ? 5 : 1; // bayonet definition @@ -60,7 +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]; @@ -90,64 +121,152 @@ 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 BayonetCutoutSlice(offset){ - rotate([0,0, atan2(offset, main_dia/2) ]){ +module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){ + // nom_rad > real_rad + rotate([0,0, atan2(offset, nom_rad) ]){ intersection(){ translate([-offset, -10, 0]) rotate([90,0,0]) - linear_extrude(height= main_dia*2) - polygon(bayo_polygon); + linear_extrude(height= nom_rad*2) + children(0); + translate([0,0, -25]) + cylinder(h=50, r= real_rad); translate([0,0, -25]) - cylinder(h=50, r= main_dia/2 + rivet_tall); - #translate([0,0, -25]) linear_extrude(height= 50) polygon([ [ 0,0 ], - [ -bayo_slice_size, -main_dia ], - [ +bayo_slice_size, -main_dia ] ]); + [ -slice_size, -real_rad*2 ], + [ +slice_size, -real_rad*2 ] ]); } } } -module BayonetCutout(){ - offs = [ for (i=[-5 : +5]) i ] * bayo_slice_size; +module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){ + offs = [ for (i=[ x_min : + slice_size : + x_max + slice_size ]) i ]; echo (offs); -* BayonetCutoutSlice(5); - for (off =offs - - //[ -20 : bayo_slice_size : 20 ] - ){ - translate([ off * 5, 0,0 ]) - echo(off); - BayonetCutoutSlice(off); + for (off=offs) + RotateProjectSlice(off, slice_size, nom_rad, real_rad) + children(0); +} + +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, convexity=10); +} + +module ProfilesDemo(){ ////toplevel + translate([-10,0]) MainProfile(); + translate([+10,0]) polygon(bayo_polygon, convexity=10); +} + +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_thick_middle, r = main_dia/2 - top_middle_dr + 1); + } + for (r=[0,180]) + rotate([0,0, r]) + translate([0,0, -side_height]) + BayonetCutout(); + for (r=[0 : 60 : 179]) { + rotate([0,0, r]) { + 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 ]); + } + } + } +} + +module SavingHole(){ + translate([0,0, -10]) + cylinder(r= main_dia/2 - jig_rim, h=20); +} + +module Jig(){ ////toplevel + difference(){ + union(){ + translate([0,0, -side_height]){ + cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick); + } + translate([-jig_mark_rad, 0, jig_thick - jig_mark]) + cube([jig_mark_rad*2, jig_mark, jig_mark]); + } + translate([0,0, -side_height-1]) + cylinder(r= main_dia/2, h= side_height + 1); + SavingHole(); + translate([0,0, -rivet_posn]) + rotate([90, 0,0]) + translate([0,0, -100]) + cylinder(r= jig_hole_dia/2, h = 200); } } -module ProfilesDemo(){ - translate([-20,0]) MainProfile(); - polygon(bayo_polygon); +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(); +//BayonetCutout(); +//MainProfile(); +//Cover(); +//Jig(); +//CoverTest();