3 // Print, for each end:
13 enable_head_cups = false;
15 main_dia = 71.2 + 0.50 - 2.26;
17 top_thick_by_oring = 3.0;
24 rivet_posn = 6.0 + 0.30;
26 rivet_width = 4.15 + 1.0;
27 rivet_tall = 5.51 + 1.49;
29 over_rivet_wall = 1.0;
31 inside_rivet_gap = 1.5;
35 bayo_interf_width = 2.0;
36 bayo_interf_slope = 0.5;
41 oring_upper_embed_angle = 80;
42 oring_compress = 0.1; // proportion
43 oring_compress_more = 0.2;
56 bayo_slice_size = coarse ? 5 : 1;
58 brace_hole_width = 1.0;
59 brace_above_below = 1.2;
60 brace_end_shorter = 0.3;
68 strap_loop_inside = 10;
69 strap_loop_strlen = 10;
70 strap_loop_elevation = 45;
72 sm_inner_circum = 218 - 1.90 - 1.00 - 0.50;
76 sm_bolt_dia = 3.5 + 0.1;
78 sm_bolt_head_dia = 6.94 + 1.0;
79 sm_bolt_head_thick = 2.14;
80 sm_bolt_nut_width = 5.89 + 0.25;
81 sm_bolt_nut_thick = 3.68;
82 sm_bolt_tighten_allow = 2.0;
84 sm_bolt_y_clear = 0.75;
90 wm_screw_dia = 4.5; // XXX
91 wm_screwdriver_dia = 6.0; // XXX
92 wm_screw_around = 4.0; // XXX
94 wm_screw_head = 7.5; // XXX
97 wmb_screw_head_dia = 10; // XXX
98 wmb_screw_around_x = 4; // XXX
99 wmb_screw_around_z = 6; // XXX
100 wmb_screw_depth_min = 10;
101 web_screw_len = 15 + 1; // XXX
102 wmb_nut_across = 8; // XXX
103 wmb_nut_around_min = 2; // XXX
104 wmb_nut_behind_min = 5;
105 wmb_nut_th = 4; // XXX
106 wmb_mount_wall = 4.5;
107 wmb_mount_gap_xy = 0.5;
108 wmb_mount_gap_z = 0.5;
109 wmb_mount_y_width = 10;
110 wmb_bottom_gap = 35; // includes allowance for padding, etc.
112 wmb_bottom_th_min = 1;
114 wmb_base_extra_rad = 10;
117 catch_stalk_len = 50;
121 catch_pin_slop = 0.25; // each side, and above
122 catch_pin_slop_x_extra = 0.0; // only on one side
123 catch_stalk_above_gap = 1.5;
124 catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
126 catch_strap_width = 12;
127 catch_stalk_base_width = 15;
130 catch_knob_above_gap = 5;
131 catch_knob_height = 3.0;
133 catch_stalk_below_gap = 1.0;
134 catch_stalk_beside_gap = 2.0;
140 bayo_entry_x = bayo_entry;
141 bayo_entry_z = bayo_entry;
142 bayo_inramp_x = bayo_inramp;
143 bayo_inramp_z = bayo_inramp;
145 oring_mid_dia = oring_bore + oring_thick;
146 oring_outer_dia = oring_mid_dia + oring_thick;
148 oring_oblate = (1 - oring_compress);
150 oring_y_rad = oring_thick/2 * oring_oblate;
151 oring_x_rad = oring_thick/2 / oring_oblate;
153 by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle));
155 side_height = rivet_posn + bayo_behind + rivet_thick/2;
156 side_thick = rivet_tall + over_rivet_wall;
158 top_z = top_thick_by_oring + oring_y_rad + by_oring_z;
160 middle_bot_z = top_z - top_thick_middle;
162 bayo_top_z = bayo_behind + bayo_gap;
164 bayo_nom_rad = main_dia/2 + side_thick;
165 bayo_real_rad = main_dia/2 + rivet_tall;
167 rivet_entry_width = rivet_width + side_rivet_gap;
169 jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
171 handling_dia = oring_bore + oring_thick*2 + min_wall*2;
174 sm_inner_rad = (sm_inner_circum + sm_bolt_tighten_allow/2) / TAU;
175 sm_outer_rad = sm_inner_rad + sm_main_thick;
177 wm_main_width = sm_main_width;
178 wm_y_min = sqrt( pow(sm_inner_rad, 2) -
179 pow(sm_inner_rad - (wm_thick - sm_main_thick), 2) );
180 wm_y_screw = wm_y_min + wm_screw_around + wm_screw_dia/2;
181 wm_y_max = wm_y_screw + wm_screw_dia/2 + wm_screw_around;
182 wm_y_slotc_screw = wm_y_screw + wm_screw_slot/2;
183 wm_y_slot1_screw = wm_y_screw + wm_screw_slot;
184 wm_y_slot1_max = wm_y_max + wm_screw_slot;
185 wm_z_slot0_screw = wm_main_width + wm_screwdriver_dia/2;
186 wm_z_slotc_screw = wm_z_slot0_screw + wm_screw_slot/2;
187 wm_z_slot1_screw = wm_z_slot0_screw + wm_screw_slot;
188 wm_z_max = wm_z_slot1_screw + wm_screw_around;
190 wmb_mount_cut_rad = sm_outer_rad + wmb_ring_gap;
191 wmb_nut_rad = wmb_nut_across / cos(30) * 0.5;
192 wmb_x_screw_plus_around_r = max(
193 wmb_screw_around_x + wmb_screw_dia/2,
194 wmb_nut_around_min + wmb_nut_across/2
196 wmb_x_screw = -sm_outer_rad + wmb_x_screw_plus_around_r;
197 wmb_x_outer = -sm_outer_rad + wmb_x_screw_plus_around_r * 2;
198 function wmb_screw_thing_y_min(dia) = sqrt(
199 pow(wmb_mount_cut_rad, 2) -
200 pow(wmb_x_screw + dia/2, 2)
202 wmb_y_screw_end = wmb_screw_thing_y_min(wmb_screw_dia);
203 wmb_y_nut_min = wmb_screw_thing_y_min(wmb_nut_across + wmb_nut_around_min*2);
204 wmb_y_mount_max = max(
205 wmb_y_nut_min + wmb_nut_th + wmb_nut_behind_min,
206 wmb_y_screw_end + wmb_screw_depth_min
209 wmb_screw_around_z + wmb_screw_dia/2,
210 wmb_nut_around_min + wmb_nut_rad
212 wmb_z_max = wmb_z_screw * 2;
213 wmbb_y_max = wmb_y_mount_max + wmb_mount_gap_xy + wmb_mount_wall;
214 wmbb_x_outer = wmb_x_outer + (wmb_mount_gap_xy + wmb_mount_wall);
215 wmbb_z_flat_max = -wmb_bottom_gap;
216 wmbb_z_flat_whole_min = wmbb_z_flat_max - wmb_bottom_th_min;
217 wmbb_z_min = wmbb_z_flat_max - wmb_bottom_th;
218 wmbb_r_top = main_dia/2 + wmb_base_extra_rad;
219 wmbb_r_bottom = wmbb_r_top - (wmb_bottom_th - wmb_bottom_th_min);
221 smc_pos = [ 0, sm_inner_rad, 0 ];
223 smc_bolt_nut_dia = sm_bolt_nut_width / cos(30);
224 smc_bolt_nut_eff_thick = sm_bolt_nut_thick + sm_bolt_tighten_allow;
226 smc_bolt_y = sm_bolt_dia/2 + sm_bolt_y_clear;
227 smc_max_y = smc_bolt_y + sm_bolt_y_over
228 + max(sm_bolt_head_dia/2, smc_bolt_nut_dia/2);
229 smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
230 + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
232 catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
233 catch_strap_thick = sm_main_thick;
235 echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
237 $fs= coarse ? 2.5 : 0.5;
240 include <poster-tube-lid-parametric.scad>
242 // bayonet definition
244 bayo_a = [ bayo_entry_x, 0 ];
245 bayo_p = [ 0, bayo_entry_z ];
246 bayo_n = [ 0, bayo_behind-bayo_inramp_z ];
247 bayo_m = [ bayo_inramp_x, bayo_behind ];
248 bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope, 1 ];
249 bayo_k = bayo_l + [ bayo_interf_width, 0 ];
250 bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ];
251 bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ];
252 bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ];
253 bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ];
255 bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0];
256 bayo_d = [-bayo_a[0], bayo_a[1]] - [rivet_entry_width,0];
257 bayo_c = bayo_d + [0,-5];
258 bayo_b = bayo_a + [0,-5];
260 bayo_f = [ bayo_e[0], bayo_g[1] + (bayo_e[0] - bayo_g[0]) ];
262 bayo_polygon = [ bayo_a,
282 cppxC = 0.41 * sm_inner_rad * TAU;
286 cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
287 // radius scaling due to nom and actual radius difference in
288 // bayo entry construction
290 cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
291 cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
293 - catch_pin_slop - catch_pin_slop_x_extra,
294 -catch_stalk_above_gap ];
295 cppi = [ cppa[0], cppd[1] ];
296 cppc = [ cppd[0], cppb[1] ];
297 cpph = cppd + [0,-1] * catch_stalk_h;
298 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
299 cppf = [ cppa[0], cppe[1] ];
300 cppg = [ cppa[0], cpph[1] ];
301 cppB = 0.5 * (cppf + cppe);
303 echo("RR", sm_inner_rad / bayo_nom_rad);
305 // catch assembly depression below pin
307 cppy6 = cppB[1] - (catch_knob_dia/2
308 + (cppc[1] - cppd[1])
309 + catch_stalk_below_gap);
310 cpp7 = [ cppB[0], cppy6 + catch_cr ];
311 cpp11 = cpp7 + [1,0] * catch_cr;
312 cppy9 = cppy6 + catch_strap_width * 1/3;
313 cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
314 cpp8 = cpp9 + [0,-1] * catch_cr;
315 cpp10 = cpp8 + [-1,0] * catch_cr;
316 cppC = [ cppxC, cpp9[1] ];
317 cppD = cppC + [0,-1] * catch_strap_width;
319 // catch assembly stalk and so on
321 catch_cr3 = catch_cr + catch_stalk_h;
323 cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
324 cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
325 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
326 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
327 cpp2r = cpp2 + [1,0] * catch_cr;
328 cpp2d = cpp2 + [0,-1] * catch_cr;
329 cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
330 cppA = [ -cppxC, cpp9[1] ];
331 cppE = [ cppA[0], cppD[1] ];
333 catch_assembly_dy = -cppy9 + catch_strap_width;
336 module MainProfile(){
337 main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
340 translate(main_cnr_pos){
343 circle(r = main_cnr);
344 circle(r = main_cnr * 0.5);
349 polygon([[ -top_middle_dr, middle_bot_z ],
350 [ -top_middle_dr, top_z ],
351 [ main_cnr_pos[0], top_z ],
352 [ side_thick, main_cnr_pos[1] ],
353 [ side_thick, -side_height ],
354 [ side_taper, -side_height ],
357 [ -oring_x_rad, by_oring_z ],
361 translate([ oring_mid_dia/2 - main_dia/2, 0 ])
363 translate([ 0, oring_y_rad ])
364 scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ])
365 circle(oring_thick/2);
366 translate([ 0, oring_y_rad*2 - oring_thick/2 ])
367 circle(oring_thick/2);
372 module StrapLoopProfile(){
373 circle(r = strap_loop_thick/2);
376 module StrapLoop(){ ////toplevel
377 bigrad = strap_loop_inside/2 + strap_loop_thick/2;
378 extralen = strap_loop_thick * 5;
381 rotate([strap_loop_elevation, 0,0]){
382 for (x= [ -1, +1 ] * bigrad) {
383 translate([x, -extralen, 0])
385 linear_extrude(height= extralen + strap_loop_strlen + 0.1,
389 translate([0, strap_loop_strlen, 0]){
391 rotate_extrude(convexity=10)
392 translate([bigrad, 0,0])
395 cube([100,100,100], center=true);
399 translate([0, 50, 0])
400 cube(100, center=true);
404 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
405 // nom_rad > real_rad
406 rotate([0,0, atan2(offset, nom_rad) ]){
408 translate([-offset, -10, 0])
410 linear_extrude(height= nom_rad*2, convexity=50)
412 translate([0,0, -25])
413 cylinder(h=50, r= real_rad);
414 translate([0,0, -25])
415 linear_extrude(height= 50, convexity=50)
417 [ -slice_size, -real_rad*2 ],
418 [ +slice_size, -real_rad*2 ] ]);
423 module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){
424 offs = [ for (i=[ x_min :
426 x_max + slice_size ]) i ];
429 RotateProjectSlice(off, slice_size, nom_rad, real_rad)
433 module BayonetCutout(){
434 RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
437 translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
438 polygon(bayo_polygon, convexity=10);
441 module ProfilesDemo(){ ////toplevel
442 translate([-10,0]) MainProfile();
443 translate([+10, -side_height]) polygon(bayo_polygon, convexity=10);
446 module LimitForHandling(){ ////toplevel
447 hull() for (r=[0,180])
451 rotate([0,0, rs * handling_angle/2]) {
452 translate([rs * xd * main_dia/2 * tan(handling_angle/2),
453 main_dia/2 + side_thick - main_cnr,
456 cylinder(r= main_cnr, h=50);
463 hull() rotate_extrude(convexity=10){
464 translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
465 circle(r = main_cnr);
466 mirror([0,1]) square([ main_cnr, 50 ]);
469 //cylinder(r= handling_dia/2, h=20);
472 module Cover(){ ////toplevel
473 render() difference(){
476 rotate_extrude(convexity=10)
477 translate([main_dia/2, 0])
479 translate([0,0, middle_bot_z])
480 cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
486 translate([0,0, -side_height])
488 rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
490 oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
492 rotate([-oring_rm_angle, 0, 0])
494 cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
496 for (r=[0 : 60 : 179]) {
498 height = top_thick_middle - brace_above_below*2;
499 translate([0,0, middle_bot_z + brace_above_below + height/2 ])
500 cube(center=true, [ oring_bore - brace_end_shorter,
501 brace_hole_width, height ]);
505 if (enable_head_cups)
508 translate([-implheadcup_large_dia * .5 - implheadcup_thick/2,
509 -implheadcup_large_dia * .0,
513 // translate(strap_loop_thick * [-0.5, 0, +1])
514 // translate([handling_dia/2, 0, -side_height])
515 // rotate([0,180,0]) rotate([0,0,90])
520 translate([0,0, -10])
521 cylinder(r= main_dia/2 - jig_rim, h=20);
524 module Jig(){ ////toplevel
527 translate([0,0, -side_height]){
528 cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
530 translate([-jig_mark_rad, 0, jig_thick - jig_mark])
531 cube([jig_mark_rad*2, jig_mark, jig_mark]);
533 translate([0,0, -side_height-1])
534 cylinder(r= main_dia/2, h= side_height + 1);
536 translate([0,0, -rivet_posn])
538 translate([0,0, -100])
539 cylinder(r= jig_hole_dia/2, h = 200);
543 module CoverPrint(){ ////toplevel
544 rotate([0,180,0]) Cover();
547 module CoverTest2(){ ////toplevel
554 module CoverTest1(){ ////toplevel
558 for (r= [ 40, 147 ]){
560 translate([0,0, -10]) {
561 cube([ main_dia*3, main_dia * .53, 18], center=true);
565 // translate([ 50, 0, 0 ])
567 // strap_loop_inside + strap_loop_thick*2 + 1,
574 module ImplHeadCupTest(){ ////toplevel
581 module SomeStrap(width, cut_width=0){
582 // children(0) is to add, (1) subtract
585 cylinder(r=sm_outer_rad, h=width);
586 StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
593 cylinder(r=sm_inner_rad, h=max(width+2, cut_width));
595 StrapMountBolt(10, width);
597 cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
602 module StrapMountBolt(l_delta, strap_width){ ///toplevel
603 // positioned relative to smc_pos
604 translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
607 translate([ -sm_bolt_shaft/2-1, 0,0 ]){
608 rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
610 translate([ -sm_bolt_shaft/2, 0,0 ])
612 cylinder($fn=6, r=smc_bolt_nut_dia/2,
613 h=smc_bolt_nut_eff_thick + l_delta);
614 translate([ sm_bolt_shaft/2, 0,0 ])
616 cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
620 module StrapMountProtrusion(half_x, max_y, cnr, width){
622 linear_extrude(height=width, convexity=10){
624 for (m = [0,1]) mirror([m,0,0]) {
625 translate([-(half_x - cnr), max_y - cnr])
627 translate([-half_x, -sm_inner_rad])
635 module StrapMount(){ ////toplevel
636 SomeStrap(sm_main_width){
638 StrapMountProtrusion(strap_loop_inside/2 + strap_loop_thick,
643 [0,0, sm_main_width] +
644 strap_loop_thick * [ 0, 0.5, -1.0 ])
651 module WallScrewHoleSlot(){ ////toplevel
652 ds = [-1,+1] * wm_screw_slot/2;
653 linextr_x_yz(-(wm_thick + 1), 1) {
657 circle(r = wm_screw_dia/2);
662 translate([0, d, 0]){
664 circle(r = wm_screw_head/2);
665 linextr_x_yz(-(wm_screw_head - wm_screw_dia)/2, 0)
666 circle(r = wm_screw_dia/2);
672 module WallMountMounts(){
673 linextr(0, wm_z_max){
674 translate([ -sm_outer_rad, 0 ])
675 rectfromto([ 0, -wm_y_max ],
676 [ wm_thick, wm_y_slot1_max ]);
679 module WallMountScrewHoles(){
680 translate([ -sm_outer_rad + wm_thick, 0, wm_z_slotc_screw]) {
681 translate([ 0, wm_y_slotc_screw, 0 ])
683 translate([ 0, -wm_y_slotc_screw, 0 ])
689 module WallMount(){ ////toplevel
690 SomeStrap(sm_main_width, wm_z_max + 2){
692 WallMountScrewHoles();
696 module WallMountBaseRingCut(){
697 circle(r = wmb_mount_cut_rad);
700 module WallMountBaseMounts(){
701 linextr(0, wmb_z_max) {
703 rectfromto([ -sm_outer_rad, -wmb_y_mount_max ],
704 [ wmb_x_outer, +wmb_y_mount_max ]);
705 WallMountBaseRingCut();
710 // screws, nuts, slots for nuts to go down into
711 module WallMountBaseScrewsEtc(){ ////toplevel
714 translate([wmb_x_screw, 0, wmb_z_screw]) {
715 linextr_y_xz(wmb_y_screw_end,
716 wmb_y_screw_end + 100) // XXX change 100
717 circle(r = wmb_screw_dia/2);
718 linextr_y_xz(wmb_y_screw_end + web_screw_len,
719 wmb_y_screw_end + 100) // XXX change 100
720 circle(r = wmb_screw_head_dia/2);
721 linextr_y_xz(wmb_y_nut_min,
722 wmb_y_nut_min + wmb_nut_th) {
725 circle(r = wmb_nut_rad, $fn = 6);
726 translate([0, 100]) // XXX change 100
727 square(wmb_nut_across, center=true);
735 module WallMountForBase(){ ////toplevel
736 SomeStrap(sm_main_width, wm_z_max + 2){
739 WallMountBaseMounts();
742 WallMountScrewHoles();
743 WallMountBaseScrewsEtc();
748 module WallMountBasePillarsPlan(){
751 rectfromto([ -sm_outer_rad, wmbb_y_max - wmb_mount_y_width ],
752 [ wmbb_x_outer, wmbb_y_max ]);
757 module WallMountBase(){ ////toplevel
760 // vertical blocks rising to join to wall mount
761 linextr(wmbb_z_min, wmb_z_max) {
763 WallMountBasePillarsPlan();
764 WallMountBaseRingCut();
769 linextr(wmbb_z_flat_whole_min, wmbb_z_flat_max)
770 circle(r = wmbb_r_top);
771 linextr(wmbb_z_min, wmbb_z_flat_max)
772 circle(r = wmbb_r_bottom);
774 linextr(wmbb_z_min, wmbb_z_flat_max) {
776 WallMountBasePillarsPlan();
777 translate([wmbb_r_bottom - 1, 0])
779 square(0.5, center=true);
784 // cutaway for mount part
785 linextr(-wmb_mount_gap_z, wmb_z_max+1) {
788 rectfromto([ -sm_outer_rad-1, wmb_y_mount_max + wmb_mount_gap_xy ],
789 [ wmb_x_outer + wmb_mount_gap_xy, 1 ]);
793 WallMountBaseScrewsEtc();
797 module WallMountForBaseDemo(){ ////toplevel
798 render() WallMountForBase();
799 color("blue") render() WallMountBase();
800 %WallMountBaseScrewsEtc();
803 module CatchAssemblyCoreProfile(){
807 translate(cpp3) circle(r= catch_cr3);
826 translate(cpp8) circle(r= catch_cr);
829 translate(cpp4) circle(r= catch_cr);
830 translate(cpp5) circle(r= catch_cr);
831 translate(cpp7) circle(r= catch_cr);
839 translate(cpp2) circle(r= catch_cr);
841 // if cpp11 is above cpp10, the subtracted hull above
842 // can go down too far. Ensure we do not cut off below cppy6.
847 [ cpp7[0] - catch_cr, cppy6 ],
852 module CatchTipProfile(dy){
857 // circle(r = dist2d(cppF, cppd));
858 //circle(r = dist2d(cppF, cppa));
869 module CatchHeadProfile(){
879 module CatchCore(){ /////toplevel
880 linear_extrude(height=catch_strap_thick, convexity=10)
881 CatchAssemblyCoreProfile();
884 linear_extrude(height=catch_head_th, convexity=10)
886 linear_extrude(height=catch_tip_th, convexity=10)
887 CatchTipProfile(catch_tip_th - catch_head_th);
890 linear_extrude(height=catch_head_th, convexity=10)
893 translate(concat(cppB,[0])) hull(){
894 translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2])
895 sphere(r = catch_knob_dia/2);
896 cylinder(r = catch_knob_dia/2, h = 0.1);
900 module CatchPreDistort(){ /////toplevel
901 scale(100 / sm_inner_rad)
906 module CatchAssembly(){ /////toplevel
907 rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
908 translate([0,0, catch_assembly_dy])
909 scale(sm_inner_rad / 100)
910 import(str("poster-tube-lid,CatchPostDistort-fa",
915 SomeStrap(catch_strap_width){
918 translate([-200, -200, -200])
919 cube([400, 200, 400]);
924 module CatchDemo(){ /////toplevel
925 color("blue") translate([0,0,
929 translate([0,0,+side_height
934 module CatchDemoS(){ /////toplevel
935 color("blue") translate([0,0,
940 translate([0,0,+side_height
943 mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
947 cube([6.15, 2,2], center=true);
950 module CatchPinProfileDemo(){ /////toplevel
951 translate([0, 0 * -bayo_behind,0]) {
953 bayo_n[0] - bayo_e[0]);
954 color("blue") translate([0,0,
957 CatchAssemblyCoreProfile();
964 polygon(bayo_polygon, convexity=10);
966 // adhoc show a position
971 )) difference(){ circle(2.5); circle(2.0); }