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=d4f2ccf12318579e7b55fb54db6921b8dde39a83;hp=d1debf9859d61a50bba95a9c527916981522e62c;hb=77c39f4394b1ede3825b88234a0d9832cc6d3b78;hpb=c1807114c2707a5e5dae41d95db0b43bc0862a46;ds=sidebyside diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index d1debf9..d4f2ccf 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 +77,25 @@ 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 = 5.0; +catch_stalk_len = 50; +catch_tip_th = 5; +catch_head_th = 3; + +catch_pin_slop = 0.25; // each side, and above +catch_pin_slop_x_extra = -0.55; // 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 = 8; -catch_pin_height = 7; +catch_knob_above_gap = 5; +catch_knob_height = 3.0; -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 @@ -141,47 +150,11 @@ 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_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); -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; @@ -225,6 +198,62 @@ 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 ]; +cppi = [ cppa[0], cppd[1] ]; +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(){ @@ -464,31 +493,32 @@ 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); } @@ -502,9 +532,9 @@ 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]) @@ -518,7 +548,7 @@ 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, @@ -532,69 +562,119 @@ 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_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([ 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); + } + // 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 CatchTipProfile(dy){ + ddy = [0,dy]; + intersection(){ + translate(cppF){ + difference(){ + circle(r = dist2d(cppF, cppd)); + //circle(r = dist2d(cppF, cppa)); + } } + polygon([ cppa, + cppi + ddy, + cppd + ddy, + cppc, + cppb ]); + } +} + +module CatchHeadProfile(){ + polygon([ cppd, + cppd, + cppi, + cppf, + cppe, + cpph ]); +} + + +module CatchCore(){ /////toplevel + linear_extrude(height=catch_strap_thick, convexity=10) + CatchAssemblyCoreProfile(); + + hull(){ + linear_extrude(height=catch_head_th, convexity=10) + CatchTipProfile(0); + linear_extrude(height=catch_tip_th, convexity=10) + CatchTipProfile(catch_tip_th - catch_head_th); + } + + 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 : 3), ".stl"), convexity=20); - SomeStrap(){ + SomeStrap(catch_strap_width){ union(){ } union(){ translate([-200, -200, -200]) @@ -605,8 +685,7 @@ 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 @@ -616,8 +695,7 @@ module CatchDemo(){ /////toplevel module CatchDemoS(){ /////toplevel color("blue") translate([0,0, - -catch_strap_width - -cpp0[1] + -catch_assembly_dy ]) CatchAssembly(); intersection(){ @@ -635,11 +713,12 @@ 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); }