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=d5d1f9318f3c2d7c1ad6c1c477f3148e4709f5ab;hp=2e8209f0430e9e3ca591dce15c9d05e35c96275f;hb=f1824fce4c0b4420e0ba377d8d8a4e43e42e4a7d;hpb=a77f9afd05af6862238596327a76aa1beccd036e diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index 2e8209f..d5d1f93 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; @@ -75,18 +77,23 @@ sm_bolt_y_over = 0.5; sm_closure_cnr = 3.0; -catch_stem_h = 3; -catch_stem_len = 50; -catch_stem_th = 3; +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_stalk_base_width = 15; catch_knob_dia = 6; -catch_knob_above_gap = 8; -catch_pin_height = 7; +catch_knob_above_gap = 5; +catch_knob_height = 5; -catch_stem_below_gap = 1.0; -catch_stem_beside_gap = 2.0; -catch_pin_gap = 0.5; -catch_hook_slope = 0.15; +catch_stalk_below_gap = 1.0; +catch_stalk_beside_gap = 2.0; // calculated @@ -141,43 +148,11 @@ smc_max_y = smc_bolt_y + sm_bolt_y_over 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_stem_beside_gap; +catch_cr = catch_knob_dia/2 + catch_stalk_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 - catch_pin_gap; - -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] ]; + +echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad); $fs= coarse ? 2.5 : 0.5; $fa= coarse ? 5 : 1; @@ -222,6 +197,61 @@ bayo_polygon = [ bayo_a, echo(bayo_polygon); +// CATCH + +//cppy6 = -catch_strap_width * 2/3; + +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 + +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 * 2, cppd[1] - catch_cr ]; +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(){ @@ -529,65 +559,95 @@ module StrapMount(){ ////toplevel } } -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, - ]); +module CatchAssemblyCoreProfile(){ difference(){ - polygon([ cpp4, - cpp3, - cpp12, - cppA, - cppE, - cppD, - cppC, - cpp9, - cpp10, - cpp11, - cpp7, - cpp5, - ], convexity=10); + union(){ + hull(){ + translate(cpp3) circle(r= catch_cr); + 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([ cpp7, - cpp5, - cpp11 ]); + polygon([cpp4, + cppg, + cpph, + cpp10, + cpp11, + ]); } - hull(){ - translate(cpp6) circle(catch_cr); - polygon([ cppA, - cpp0, - cpp1 ]); + translate(cpp2) circle(r= catch_cr); + } +} + +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]) - linear_extrude(height=catch_strap_thick, convexity=10) - CatchCoreProfile(); + CatchCore(); } module CatchAssembly(){ /////toplevel - rotate([0,0, -0.5 * (cpp1[0] + cpp2[0]) / sm_inner_rad * 360/TAU]) - translate([0,0, catch_strap_width]) + 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 : 1), + (coarse ? 20 : 3), ".stl"), convexity=20); @@ -602,8 +662,7 @@ module CatchAssembly(){ /////toplevel module CatchDemo(){ /////toplevel color("blue") translate([0,0, - -catch_strap_width - -cpp0[1] + -catch_assembly_dy ]) CatchAssembly(); translate([0,0,+side_height @@ -611,6 +670,35 @@ module CatchDemo(){ /////toplevel 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();