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=c652d7d1235da72484122a0df10222cb664f2810;hb=9d27f71901e810cf87975ab5e51ffda0c9a58911;hpb=05736c1a9f02fe7537e7953d2db5b92ad3bc0fbf diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index c652d7d..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; @@ -75,24 +77,24 @@ 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_stem_len * 0.75; +catch_stalk_eff_bend_rad = catch_stalk_len * 0.75; -catch_stalk_base_width = 15; +catch_strap_width = 12; +catch_stalk_base_width = catch_stalk_h; catch_knob_dia = 6; -catch_knob_above_gap = 8; -catch_knob_height = 6; +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 @@ -147,12 +149,8 @@ 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_strap_width = sm_main_width; +catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap; 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); @@ -201,27 +199,33 @@ echo(bayo_polygon); // CATCH -//cppy6 = -catch_strap_width * 2/3; - -cppxC = 0.34 * sm_inner_rad * TAU; +cppxC = 0.41 * sm_inner_rad * TAU; // catch pin -cppa = bayo_f + [1,-1] * catch_pin_slop; -cppb = bayo_g + [1,-1] * catch_pin_slop; -cppd = [ bayo_n[0] - catch_pin_slop, -catch_stalk_above_gap ]; +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_stem_h; +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_stem_below_gap); + + catch_stalk_below_gap); cpp7 = [ cppB[0], cppy6 + catch_cr ]; cpp11 = cpp7 + [1,0] * catch_cr; cppy9 = cppy6 + catch_strap_width * 1/3; @@ -233,16 +237,20 @@ cppD = cppC + [0,-1] * catch_strap_width; // catch assembly stalk and so on -cppF = [ cppg[0] - catch_stem_stalk_eff_bend_rad, cppd[1] ]; -cpp4 = [ cppg[0] - catch_stem_len, cpph[1] ] + [1,-1] * catch_cr; +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 * 2, cppd[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; @@ -483,31 +491,32 @@ module ImplHeadCupTest(){ ////toplevel ImplHeadCup(); } -module SomeStrap(){ +module SomeStrap(width){ // children(0) is to add, (1) subtract difference(){ union(){ - cylinder(r=sm_outer_rad, h=sm_main_width); + cylinder(r=sm_outer_rad, h=width); StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr, smc_max_y, - sm_closure_cnr); + sm_closure_cnr, + width); children(0); } translate([0,0,-1]) - cylinder(r=sm_inner_rad, h=sm_main_width+2); + cylinder(r=sm_inner_rad, h=width+2); translate(smc_pos) - StrapMountBolt(10); + StrapMountBolt(10, width); translate(smc_pos) cube([ sm_bolt_tighten_allow, 40,100 ], center=true); children(1); } } -module StrapMountBolt(l_delta){ ///toplevel +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, - sm_main_width/2]){ + 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); } @@ -521,9 +530,9 @@ module StrapMountBolt(l_delta){ ///toplevel } } -module StrapMountProtrusion(half_x, max_y, cnr){ +module StrapMountProtrusion(half_x, max_y, cnr, width){ translate(smc_pos){ - linear_extrude(height=sm_main_width, convexity=10){ + linear_extrude(height=width, convexity=10){ hull(){ for (m = [0,1]) mirror([m,0,0]) { translate([-(half_x - cnr), max_y - cnr]) @@ -537,7 +546,7 @@ module StrapMountProtrusion(half_x, max_y, cnr){ } module StrapMount(){ ////toplevel - SomeStrap(){ + SomeStrap(sm_main_width){ rotate([0,0,180]){ StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick, strap_hoop_thick, @@ -555,7 +564,7 @@ module CatchAssemblyCoreProfile(){ difference(){ union(){ hull(){ - translate(cpp3) circle(r= catch_cr); + translate(cpp3) circle(r= catch_cr3); polygon([ cpp3, cpp2r, cpp5, @@ -587,61 +596,51 @@ module CatchAssemblyCoreProfile(){ 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 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 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_knob_dia/2]) + 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); } @@ -654,15 +653,15 @@ module CatchPreDistort(){ /////toplevel } 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 : 3), ".stl"), convexity=20); - SomeStrap(){ + SomeStrap(catch_strap_width){ union(){ } union(){ translate([-200, -200, -200]) @@ -673,8 +672,7 @@ 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 @@ -684,8 +682,7 @@ module CatchDemo(){ /////toplevel module CatchDemoS(){ /////toplevel color("blue") translate([0,0, - -catch_strap_width - -cpp0[1] + -catch_assembly_dy ]) CatchAssembly(); intersection(){ @@ -703,11 +700,12 @@ module CatchPinProfileDemo(){ /////toplevel echo("G ", cpp2[0] - cpp1[0], bayo_n[0] - bayo_e[0]); - color("blue") translate([-cpp2[0], - -cpp2[1], + color("blue") translate([0,0, +1, - ]) - CatchCoreProfile(); + ]) { + CatchAssemblyCoreProfile(); + CatchHeadProfile(); + } polygon(bayo_polygon, convexity=10); }