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=d4210a2d5d298e40bb70badfecf1eab2c8d21676;hp=ac2dd0244d6b7e593ed41b709f9ea58d4abb7831;hb=9d27f71901e810cf87975ab5e51ffda0c9a58911;hpb=ca9572e6efd5ac7ad2ab099c541ceceb07b3e227 diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index ac2dd02..d4210a2 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -1,5 +1,7 @@ // -*- C -*- +include + coarse = false; main_dia = 71.2 + 0.50 - 2.26; @@ -11,7 +13,7 @@ main_cnr = 6.0; min_wall = 3; -rivet_posn = 6.0 + 0.6; +rivet_posn = 6.0 + 0.30; rivet_thick = 1.67; rivet_width = 4.15 + 1.0; rivet_tall = 5.51 + 1.49; @@ -20,7 +22,7 @@ over_rivet_wall = 1.0; side_rivet_gap = 1.5; inside_rivet_gap = 1.5; -bayo_interf = 0.85; +bayo_interf = 0.30; bayo_behind = 3.5; bayo_interf_width = 2.0; bayo_interf_slope = 0.5; @@ -30,6 +32,7 @@ oring_bore = 62.0; oring_upper_embed_angle = 80; oring_compress = 0.1; // proportion +oring_compress_more = 0.2; oring_rm_beside = 8; oring_rm_scale = 2.0; @@ -57,8 +60,46 @@ strap_hoop_inside = 10; strap_hoop_strlen = 10; strap_hoop_elevation = 45; +sm_inner_circum = 218 - 1.90 - 1.00 - 0.50; +sm_main_thick = 2.0; +sm_main_width = 20; + +sm_bolt_dia = 3.5 + 0.1; +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_tighten_allow = 2.0; + +sm_bolt_y_clear = 0.75; +sm_bolt_y_over = 0.5; + +sm_closure_cnr = 3.0; + +catch_stalk_h = 4.5; +catch_stalk_len = 50; +catch_head_th = 3; + +catch_pin_slop = 0.25; // each side, and above +catch_pin_slop_x_extra = 0.0; // only on one side +catch_stalk_above_gap = 1.5; +catch_stalk_eff_bend_rad = catch_stalk_len * 0.75; + +catch_strap_width = 12; +catch_stalk_base_width = catch_stalk_h; + +catch_knob_dia = 6; +catch_knob_above_gap = 5; +catch_knob_height = 5; + +catch_stalk_below_gap = 1.0; +catch_stalk_beside_gap = 2.0; + // calculated +TAU = PI*2; + bayo_entry_x = bayo_entry; bayo_entry_z = bayo_entry; bayo_inramp_x = bayo_entry; @@ -84,6 +125,9 @@ middle_bot_z = top_z - top_thick_middle; bayo_entry = bayo_behind / 3.0; bayo_top_z = bayo_behind + bayo_gap; +bayo_nom_rad = main_dia/2 + side_thick; +bayo_real_rad = main_dia/2 + rivet_tall; + rivet_entry_width = rivet_width + side_rivet_gap; jig_mark_rad = jig_mark + main_dia/2 + jig_thick; @@ -91,9 +135,30 @@ 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 + sm_bolt_tighten_allow/2) / 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_nut_eff_thick = sm_bolt_nut_thick + sm_bolt_tighten_allow; + +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 + + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2; + +catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap; +catch_strap_thick = sm_main_thick; + +echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad); + $fs= coarse ? 2.5 : 0.5; $fa= coarse ? 5 : 1; +include + // bayonet definition bayo_a = [ bayo_entry_x, 0 ]; @@ -132,6 +197,61 @@ bayo_polygon = [ bayo_a, echo(bayo_polygon); +// CATCH + +cppxC = 0.41 * sm_inner_rad * TAU; + +// catch pin + +cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad); +// radius scaling due to nom and actual radius difference in +// bayo entry construction + +cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj; +cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj; +cppd = [ bayo_n[0] + - catch_pin_slop - catch_pin_slop_x_extra, + -catch_stalk_above_gap ]; +cppc = [ cppd[0], cppb[1] ]; +cpph = cppd + [0,-1] * catch_stalk_h; +cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2); +cppf = [ cppa[0], cppe[1] ]; +cppg = [ cppa[0], cpph[1] ]; +cppB = 0.5 * (cppf + cppe); + +echo("RR", sm_inner_rad / bayo_nom_rad); + +// catch assembly depression below pin + +cppy6 = cppB[1] - (catch_knob_dia/2 + + (cppc[1] - cppd[1]) + + catch_stalk_below_gap); +cpp7 = [ cppB[0], cppy6 + catch_cr ]; +cpp11 = cpp7 + [1,0] * catch_cr; +cppy9 = cppy6 + catch_strap_width * 1/3; +cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ]; +cpp8 = cpp9 + [0,-1] * catch_cr; +cpp10 = cpp8 + [-1,0] * catch_cr; +cppC = [ cppxC, cpp9[1] ]; +cppD = cppC + [0,-1] * catch_strap_width; + +// catch assembly stalk and so on + +catch_cr3 = catch_cr + catch_stalk_h; + +cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ]; +cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr; +cpp5 = [ cpp4[0], cppC[1] + catch_cr ]; +cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width); +cpp2r = cpp2 + [1,0] * catch_cr; +cpp2d = cpp2 + [0,-1] * catch_cr; +cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ]; +cppA = [ -cppxC, cpp9[1] ]; +cppE = [ cppA[0], cppD[1] ]; + +catch_assembly_dy = -cppy9 + catch_strap_width; + + module MainProfile(){ main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr; difference(){ @@ -160,7 +280,7 @@ module MainProfile(){ translate([ oring_mid_dia/2 - main_dia/2, 0 ]) hull(){ translate([ 0, oring_y_rad ]) - scale([ 1/oring_oblate, oring_oblate ]) + scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ]) circle(oring_thick/2); translate([ 0, oring_y_rad*2 - oring_thick/2 ]) circle(oring_thick/2); @@ -200,10 +320,6 @@ module StrapHoop(){ ////toplevel } } -module HandlingProfile(){ -// translate([ -} - module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){ // nom_rad > real_rad rotate([0,0, atan2(offset, nom_rad) ]){ @@ -235,8 +351,8 @@ module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){ module BayonetCutout(){ RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size, - main_dia/2 + side_thick, - main_dia/2 + rivet_tall) + bayo_nom_rad, + bayo_real_rad) translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0]) polygon(bayo_polygon, convexity=10); } @@ -305,6 +421,12 @@ module Cover(){ ////toplevel } } } + for (r=[0,180]) + rotate([0,0,r]) + translate([-implheadcup_large_dia * .5 - implheadcup_thick/2, + -implheadcup_large_dia * .0, + middle_bot_z + 0.1]) + ImplHeadCup(); // translate(strap_hoop_thick * [-0.5, 0, +1]) // translate([handling_dia/2, 0, -side_height]) // rotate([0,180,0]) rotate([0,0,90]) @@ -362,6 +484,231 @@ module CoverTest1(){ ////toplevel } } +module ImplHeadCupTest(){ ////toplevel + for (r=[0,180]) + rotate([0,0,r]) + translate([-17,0,0]) + ImplHeadCup(); +} + +module SomeStrap(width){ + // children(0) is to add, (1) subtract + difference(){ + union(){ + cylinder(r=sm_outer_rad, h=width); + StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr, + smc_max_y, + sm_closure_cnr, + width); + children(0); + } + translate([0,0,-1]) + cylinder(r=sm_inner_rad, h=width+2); + translate(smc_pos) + StrapMountBolt(10, width); + translate(smc_pos) + cube([ sm_bolt_tighten_allow, 40,100 ], center=true); + children(1); + } +} + +module StrapMountBolt(l_delta, strap_width){ ///toplevel + // positioned relative to smc_pos + translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2, + smc_bolt_y, + strap_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=smc_bolt_nut_eff_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, cnr, width){ + translate(smc_pos){ + linear_extrude(height=width, convexity=10){ + hull(){ + for (m = [0,1]) mirror([m,0,0]) { + translate([-(half_x - cnr), max_y - cnr]) + circle(r=cnr); + translate([-half_x, -sm_inner_rad]) + square([1,1]); + } + } + } + } +} + +module StrapMount(){ ////toplevel + SomeStrap(sm_main_width){ + rotate([0,0,180]){ + StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick, + strap_hoop_thick, + sm_closure_cnr); + translate(smc_pos + + [0,0, sm_main_width] + + strap_hoop_thick * [ 0, 0.5, -1.0 ]) + StrapHoop(); + } + union(){ }; + } +} + +module CatchAssemblyCoreProfile(){ + difference(){ + union(){ + hull(){ + translate(cpp3) circle(r= catch_cr3); + polygon([ cpp3, + cpp2r, + cpp5, + cpph, + cppd + ]); + } + polygon([cppD, + cppC, + cpp9, + cpp10, + cpp11, + cpp4, + cpp2r, + cpp2d, + cppA, + cppE + ]); + translate(cpp8) circle(r= catch_cr); + } + hull(){ + translate(cpp4) circle(r= catch_cr); + translate(cpp5) circle(r= catch_cr); + translate(cpp7) circle(r= catch_cr); + polygon([cpp4, + cppg, + cpph, + cpp10, + cpp11, + ]); + } + translate(cpp2) circle(r= catch_cr); + } + // if cpp11 is above cpp10, the subtracted hull above + // can go down too far. Ensure we do not cut off below cppy6. + polygon([ cppE, + cppD, + cpp9, + [ cpp9[0], cppy6 ], + [ cpp7[0] - catch_cr, cppy6 ], + cpp2d + ]); +} + +module CatchHeadProfile(){ + intersection(){ + translate(cppF){ + difference(){ + circle(r = dist2d(cppF, cppd)); + //circle(r = dist2d(cppF, cppa)); + } + } + polygon([ cppa, + cppg, + cpph, + cppd, + cppc, + cppb ]); + } + polygon([ cppd, + cppg, + cppf, + cppe, + cpph ]); +} + + +module CatchCore(){ /////toplevel + linear_extrude(height=catch_strap_thick, convexity=10) + CatchAssemblyCoreProfile(); + + linear_extrude(height=catch_head_th, convexity=10) + CatchHeadProfile(); + + translate(concat(cppB,[0])) hull(){ + translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2]) + sphere(r = catch_knob_dia/2); + cylinder(r = catch_knob_dia/2, h = 0.1); + } +} + +module CatchPreDistort(){ /////toplevel + scale(100 / sm_inner_rad) + rotate([90,0,0]) + CatchCore(); +} + +module CatchAssembly(){ /////toplevel + rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU]) + translate([0,0, catch_assembly_dy]) + scale(sm_inner_rad / 100) + import(str("poster-tube-lid,CatchPostDistort-fa", + (coarse ? 20 : 3), + ".stl"), + convexity=20); + + SomeStrap(catch_strap_width){ + union(){ } + union(){ + translate([-200, -200, -200]) + cube([400, 200, 400]); + } + } +} + +module CatchDemo(){ /////toplevel + color("blue") translate([0,0, + -catch_assembly_dy + ]) + CatchAssembly(); + translate([0,0,+side_height + ]) + Cover(); +} + +module CatchDemoS(){ /////toplevel + color("blue") translate([0,0, + -catch_assembly_dy + ]) + CatchAssembly(); + intersection(){ + translate([0,0,+side_height + ]) + Cover(); + mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]); + } + color("black") + translate([0,-33,0]) + cube([6.15, 2,2], center=true); +} + +module CatchPinProfileDemo(){ /////toplevel + echo("G ", + cpp2[0] - cpp1[0], + bayo_n[0] - bayo_e[0]); + color("blue") translate([0,0, + +1, + ]) { + CatchAssemblyCoreProfile(); + CatchHeadProfile(); + } + polygon(bayo_polygon, convexity=10); +} + //ProfilesDemo(); //BayonetCutout(); //MainProfile();