X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=poster-tube-lid.scad;h=d4210a2d5d298e40bb70badfecf1eab2c8d21676;hb=9d27f71901e810cf87975ab5e51ffda0c9a58911;hp=abc2c17f3738c8e295aef48930c3db5f599deca5;hpb=6a75d2c8a06f9856ab799f4eb7d241c1ddb5f5c4;p=reprap-play.git diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad index abc2c17..d4210a2 100644 --- a/poster-tube-lid.scad +++ b/poster-tube-lid.scad @@ -77,25 +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 = 0.25; // only on one side +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 @@ -150,12 +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); @@ -204,8 +199,6 @@ echo(bayo_polygon); // CATCH -//cppy6 = -catch_strap_width * 2/3; - cppxC = 0.41 * sm_inner_rad * TAU; // catch pin @@ -220,7 +213,7 @@ 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] ]; @@ -232,7 +225,7 @@ echo("RR", sm_inner_rad / bayo_nom_rad); 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; @@ -244,13 +237,15 @@ 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_stem_len, cpph[1] ] + [1,-1] * catch_cr; +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] ]; @@ -496,31 +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); } @@ -534,9 +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]) @@ -550,7 +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, @@ -568,7 +564,7 @@ module CatchAssemblyCoreProfile(){ difference(){ union(){ hull(){ - translate(cpp3) circle(r= catch_cr); + translate(cpp3) circle(r= catch_cr3); polygon([ cpp3, cpp2r, cpp5, @@ -602,6 +598,15 @@ module CatchAssemblyCoreProfile(){ } 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(){ @@ -609,7 +614,7 @@ module CatchHeadProfile(){ translate(cppF){ difference(){ circle(r = dist2d(cppF, cppd)); - circle(r = dist2d(cppF, cppa)); + //circle(r = dist2d(cppF, cppa)); } } polygon([ cppa, @@ -631,11 +636,11 @@ module CatchCore(){ /////toplevel linear_extrude(height=catch_strap_thick, convexity=10) CatchAssemblyCoreProfile(); - linear_extrude(height=catch_strap_thick, convexity=10) + 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); } @@ -648,7 +653,7 @@ module CatchPreDistort(){ /////toplevel } module CatchAssembly(){ /////toplevel - rotate([0,0, -(cppe[0] + cppB[0]) / sm_inner_rad * 360/TAU]) + 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", @@ -656,7 +661,7 @@ module CatchAssembly(){ /////toplevel ".stl"), convexity=20); - SomeStrap(){ + SomeStrap(catch_strap_width){ union(){ } union(){ translate([-200, -200, -200])