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=2e11f7949079ddf22289ab82dfc780bf4f0db240;hp=dd5bc0ab03a4b835a19da6eb2c594babbab0dbeb;hb=9b3087a6117d4143978dad2af8901be6de9bcd15;hpb=54d6a65a7338ba3bdb5dfbfc577123cedcdc0955 diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index dd5bc0a..2e11f79 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -11,7 +11,7 @@ main_cnr = 6.0; min_wall = 3; -rivet_posn = 6.0 + 0.1; +rivet_posn = 6.0 + 0.30; rivet_thick = 1.67; rivet_width = 4.15 + 1.0; rivet_tall = 5.51 + 1.49; @@ -20,7 +20,7 @@ over_rivet_wall = 1.0; side_rivet_gap = 1.5; inside_rivet_gap = 1.5; -bayo_interf = 0.44; +bayo_interf = 0.30; bayo_behind = 3.5; bayo_interf_width = 2.0; bayo_interf_slope = 0.5; @@ -30,6 +30,7 @@ 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; @@ -57,22 +58,36 @@ 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_inner_circum = 218 - 1.90 - 1.00 - 0.50; +sm_main_thick = 2.0; +sm_main_width = 20; -sm_bolt_dia = 3.5; +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 = 0.5; +sm_bolt_y_clear = 0.75; sm_bolt_y_over = 0.5; sm_closure_cnr = 3.0; +catch_stem_h = 3; +catch_stem_len = 50; +catch_stem_th = 3; + +catch_knob_dia = 6; +catch_knob_above_gap = 8; +catch_pin_height = 7; + +catch_stem_below_gap = 1.0; +catch_stem_beside_gap = 2.0; +catch_pin_gap = 0.5; +catch_hook_slope = 0.15; + // calculated TAU = PI*2; @@ -102,6 +117,9 @@ 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; @@ -109,22 +127,66 @@ 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_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 - + max(sm_bolt_head_thick, sm_bolt_nut_thick); + + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2; + +catch_cr = catch_knob_dia/2 + catch_stem_beside_gap; +catch_strap_width = sm_main_width; +catch_strap_thick = sm_main_thick; +catch_stem_end_h = catch_stem_h; +catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad) + - catch_pin_gap; + +echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad); + +cppy6 = -catch_strap_width/2; +cppxC = 0.34 * sm_inner_rad * TAU; +cppB = [ catch_pin_width/2, + cppy6 + + catch_stem_below_gap + + catch_pin_height + + catch_knob_dia/2 ]; +cpp0 = [ 0, + cppB[1] + + catch_knob_dia + + catch_knob_above_gap ]; +cpp12 = cpp0 + [1,0] * (catch_pin_height * catch_hook_slope); +cpp1 = cpp0 + [0,1] * catch_pin_height; +cpp2 = cpp1 + [1,0] * catch_pin_width; +cpp4 = cpp0 + [0,-1] * catch_stem_end_h; +cpp3 = [ cpp2[0], cpp4[1] ]; +cpp5 = [ cpp0[0] - catch_stem_len, + -catch_stem_h ]; +cpp6 = [ cpp5[0], catch_cr ]; +cpp7 = cppB + [1,-1] * catch_knob_dia/2 + + [ catch_stem_beside_gap, -catch_stem_below_gap ] + + [ 0, -catch_pin_height ] + + [-1,1] * catch_cr; +cpp11 = cpp7 + [1,0] * catch_cr; +cpp10 = [ cpp11[0], 0 - catch_cr ]; +cpp8 = cpp10 + [1,0] * catch_cr; +cpp9 = cpp8 + [0,1] * catch_cr; +cppC = [ cppxC, cpp9[1] ]; +cppA = [ -cppxC, 0 ]; +cppD = cppC + [0,-1] * catch_strap_width; +cppE = [ cppA[0], cppD[1] ]; $fs= coarse ? 2.5 : 0.5; $fa= coarse ? 5 : 1; +include + // bayonet definition bayo_a = [ bayo_entry_x, 0 ]; @@ -191,7 +253,7 @@ 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); @@ -231,10 +293,6 @@ 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) ]){ @@ -266,8 +324,8 @@ 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); } @@ -336,6 +394,12 @@ 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]) @@ -393,9 +457,36 @@ module CoverTest1(){ ////toplevel } } +module ImplHeadCupTest(){ ////toplevel + for (r=[0,180]) + rotate([0,0,r]) + translate([-17,0,0]) + ImplHeadCup(); +} + +module SomeStrap(){ + // children(0) is to add, (1) subtract + difference(){ + union(){ + cylinder(r=sm_outer_rad, h=sm_main_width); + StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr, + smc_max_y, + sm_closure_cnr); + children(0); + } + translate([0,0,-1]) + cylinder(r=sm_inner_rad, h=sm_main_width+2); + translate(smc_pos) + StrapMountBolt(10); + translate(smc_pos) + cube([ sm_bolt_tighten_allow, 40,100 ], center=true); + children(1); + } +} + module StrapMountBolt(l_delta){ ///toplevel // positioned relative to smc_pos - translate([(sm_bolt_nut_thick - sm_bolt_head_thick)/2, + translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2, smc_bolt_y, sm_main_width/2]){ translate([ -sm_bolt_shaft/2-1, 0,0 ]){ @@ -403,7 +494,8 @@ module StrapMountBolt(l_delta){ ///toplevel } 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); + 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); @@ -426,20 +518,131 @@ module StrapMountProtrusion(half_x, max_y, cnr){ } module StrapMount(){ ////toplevel + SomeStrap(){ + 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 CatchCoreProfile(){ ////toplevel + hull(){ + translate(cppB) circle(r= catch_knob_dia/2); + polygon([cpp4, + cppB, + cpp3]); + } + translate(cpp8) + circle(catch_cr); + polygon([ + cpp4, + cppB, + cpp3, + cpp2, + cpp1, + cpp12, + ]); difference(){ + polygon([ cpp4, + cpp3, + cpp12, + cppA, + cppE, + cppD, + cppC, + cpp9, + cpp10, + cpp11, + cpp7, + cpp5, + ], convexity=10); + hull(){ + translate(cpp7) circle(r= catch_cr); + polygon([ cpp7, + cpp5, + cpp11 ]); + } + hull(){ + translate(cpp6) circle(catch_cr); + polygon([ cppA, + cpp0, + cpp1 ]); + } + } +} + +module CatchPreDistort(){ /////toplevel + scale(100 / sm_inner_rad) + rotate([90,0,0]) + linear_extrude(height=catch_strap_thick, convexity=10) + CatchCoreProfile(); +} + +module CatchAssembly(){ /////toplevel + rotate([0,0, -0.5 * (cpp1[0] + cpp2[0]) / sm_inner_rad * 360/TAU]) + translate([0,0, catch_strap_width]) + scale(sm_inner_rad / 100) + import(str("poster-tube-lid,CatchPostDistort-fa", + (coarse ? 20 : 1), + ".stl"), + convexity=20); + + SomeStrap(){ + union(){ } union(){ - cylinder(r=sm_outer_rad, h=sm_main_width); - StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr, - smc_max_y, - sm_closure_cnr); + translate([-200, -200, -200]) + cube([400, 200, 400]); } - translate([0,0,-1]) - cylinder(r=sm_inner_rad, h=sm_main_width+2); - translate(smc_pos) - StrapMountBolt(10); } } +module CatchDemo(){ /////toplevel + color("blue") translate([0,0, + -catch_strap_width + -cpp0[1] + ]) + CatchAssembly(); + translate([0,0,+side_height + ]) + Cover(); +} + +module CatchDemoS(){ /////toplevel + color("blue") translate([0,0, + -catch_strap_width + -cpp0[1] + ]) + 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([-cpp2[0], + -cpp2[1], + +1, + ]) + CatchCoreProfile(); + polygon(bayo_polygon, convexity=10); +} + //ProfilesDemo(); //BayonetCutout(); //MainProfile();