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=d6cd360ddc1c60e3f8709065fa8ce3370703e997;hp=deb51e5d444ccabe8753dfe631bc754be4724789;hb=3a48bcb0bb3b3b9192d0b9850312d911113b02da;hpb=d2640239074b9cf594e5eaa4c82640d7e92613cd;ds=sidebyside diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index deb51e5..d6cd360 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -1,24 +1,29 @@ // -*- C -*- +coarse = false; + main_dia = 71.2 + 0.50 - 2.26; top_thick_middle = 4; -top_thick_by_oring = 2.5; +top_thick_by_oring = 3.0; top_middle_dr = 11; -main_cnr = 4.0; +main_cnr = 6.0; + +min_wall = 3; -rivet_posn = 6.0; +rivet_posn = 6.0 + 0.6; 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; +inside_rivet_gap = 1.5; -bayo_interf = 1.25; +bayo_interf = 0.85; 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; @@ -26,13 +31,17 @@ oring_bore = 62.0; oring_upper_embed_angle = 80; oring_compress = 0.1; // proportion +oring_rm_beside = 8; +oring_rm_scale = 2.0; +oring_rm_angle = 20; + side_taper = 1.0; -bayo_above_gap = 1.0; +bayo_gap = 6.0; 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; @@ -43,6 +52,11 @@ 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; + // calculated bayo_entry_x = bayo_entry; @@ -58,25 +72,27 @@ 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_z = top_thick_by_oring + oring_y_rad + 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; -bayo_entry_ramp = bayo_entry + bayo_interf; +bayo_top_z = bayo_behind + bayo_gap; 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; +handling_angle = 45; + +$fs= coarse ? 2.5 : 0.5; +$fa= coarse ? 5 : 1; // bayonet definition @@ -87,9 +103,8 @@ 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_h = [ bayo_i[0], bayo_behind + rivet_thick - + bayo_above_gap + bayo_interf ]; +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] ]; bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0]; @@ -137,8 +152,8 @@ 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); } @@ -153,6 +168,42 @@ 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([ +} + module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){ // nom_rad > real_rad rotate([0,0, atan2(offset, nom_rad) ]){ @@ -186,27 +237,65 @@ 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); } module ProfilesDemo(){ ////toplevel translate([-10,0]) MainProfile(); - translate([+10,0]) polygon(bayo_polygon, convexity=10); + translate([+10, -side_height]) polygon(bayo_polygon, convexity=10); +} + +module LimitForHandling(){ ////toplevel + hull() for (r=[0,180]) + rotate([0,0,r]) { + for (rs=[-1,+1]) { + for (xd=[0,1]) { + rotate([0,0, rs * handling_angle/2]) { + translate([rs * xd * main_dia/2 * tan(handling_angle/2), + main_dia/2 + side_thick - main_cnr, + top_z - main_cnr]) { + mirror([0,0,1]) + cylinder(r= main_cnr, h=50); + sphere(main_cnr); + } + } + } + } + } + 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_thick_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_middle - brace_above_below*2; @@ -216,6 +305,10 @@ 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(){ @@ -252,8 +345,20 @@ module CoverTest2(){ ////toplevel module CoverTest1(){ ////toplevel difference(){ CoverTest2(); - translate([0,0, -10]) - cube([ main_dia*3, main_dia * .85, 20], center=true); + difference(){ + for (r= [ 40, 147 ]){ + rotate([0,0, r]){ + translate([0,0, -10]) { + cube([ main_dia*3, main_dia * .55, 18], center=true); + } + } + } + translate([ 50, 0, 0 ]) + cube([ 100, + strap_hoop_inside + strap_hoop_thick*2 + 1, + 100 ], + center=true); + } } }