poster-tube-lid.scad

   1 // -*- C -*-
   2
   3 coarse = false;
   4
   5 main_dia = 71.2 + 0.50 - 2.26;
   6 top_thick_middle = 4;
   7 top_thick_by_oring = 3.0;
   8 top_middle_dr = 11;
   9
  10 main_cnr = 6.0;
  11
  12 min_wall = 3;
  13
  14 rivet_posn = 6.0 + 0.30;
  15 rivet_thick = 1.67;
  16 rivet_width = 4.15 + 1.0;
  17 rivet_tall = 5.51 + 1.49;
  18
  19 over_rivet_wall = 1.0;
  20 side_rivet_gap = 1.5;
  21 inside_rivet_gap = 1.5;
  22
  23 bayo_interf = 0.30;
  24 bayo_behind = 3.5;
  25 bayo_interf_width = 2.0;
  26 bayo_interf_slope = 0.5;
  27
  28 oring_thick = 5.0;
  29 oring_bore = 62.0;
  30
  31 oring_upper_embed_angle = 80;
  32 oring_compress = 0.1; // proportion
  33 oring_compress_more = 0.2;
  34
  35 oring_rm_beside = 8;
  36 oring_rm_scale = 2.0;
  37 oring_rm_angle = 20;
  38
  39 side_taper = 1.0;
  40
  41 bayo_gap = 6.0;
  42
  43 bayo_entry = bayo_behind/3;
  44
  45 bayo_slice_size = coarse ? 5 : 1;
  46
  47 brace_hole_width = 1.0;
  48 brace_above_below = 1.2;
  49 brace_end_shorter = 0.3;
  50
  51 jig_thick = 1.4;
  52 jig_hole_dia = 3.0;
  53 jig_rim = 5;
  54 jig_mark = 5;
  55
  56 strap_hoop_thick = 6;
  57 strap_hoop_inside = 10;
  58 strap_hoop_strlen = 10;
  59 strap_hoop_elevation = 45;
  60
  61 sm_inner_circum = 218 - 1.90 - 1.00 - 0.50;
  62 sm_main_thick = 2.0;
  63 sm_main_width = 20;
  64
  65 sm_bolt_dia = 3.5 + 0.1;
  66 sm_bolt_shaft = 21.9;
  67 sm_bolt_head_dia = 6.94 + 1.0;
  68 sm_bolt_head_thick = 2.14;
  69 sm_bolt_nut_width = 5.89 + 0.25;
  70 sm_bolt_nut_thick = 3.68;
  71 sm_bolt_tighten_allow = 2.0;
  72
  73 sm_bolt_y_clear = 0.75;
  74 sm_bolt_y_over = 0.5;
  75
  76 sm_closure_cnr = 3.0;
  77
  78 catch_stem_h = 3;
  79 catch_stem_len = 50;
  80 catch_stem_th = 3;
  81
  82 catch_pin_slop = 0.25; // each side, and above
  83 catch_stalk_above_gap = 1.5;
  84 catch_stalk_eff_bend_rad = catch_stem_len * 0.75;
  85
  86 catch_stalk_base_width = 15;
  87
  88 catch_knob_dia = 6;
  89 catch_knob_above_gap = 8;
  90 catch_knob_height = 6;
  91
  92 catch_stem_below_gap = 1.0;
  93 catch_stem_beside_gap = 2.0;
  94 catch_pin_gap = 0.5;
  95 catch_hook_slope = 0.15;
  96
  97 // calculated
  98
  99 TAU = PI*2;
 100
 101 bayo_entry_x = bayo_entry;
 102 bayo_entry_z = bayo_entry;
 103 bayo_inramp_x = bayo_entry;
 104 bayo_inramp_z = bayo_entry;
 105
 106 oring_mid_dia = oring_bore + oring_thick;
 107 oring_outer_dia = oring_mid_dia + oring_thick;
 108
 109 oring_oblate = (1 - oring_compress);
 110
 111 oring_y_rad = oring_thick/2 * oring_oblate;
 112 oring_x_rad = oring_thick/2 / oring_oblate;
 113
 114 by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle));
 115
 116 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 117 side_thick = rivet_tall + over_rivet_wall;
 118
 119 top_z = top_thick_by_oring + oring_y_rad + by_oring_z;
 120
 121 middle_bot_z = top_z - top_thick_middle;
 122
 123 bayo_entry = bayo_behind / 3.0;
 124 bayo_top_z = bayo_behind + bayo_gap;
 125
 126 bayo_nom_rad = main_dia/2 + side_thick;
 127 bayo_real_rad = main_dia/2 + rivet_tall;
 128
 129 rivet_entry_width = rivet_width + side_rivet_gap;
 130
 131 jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
 132
 133 handling_dia = oring_bore + oring_thick*2 + min_wall*2;
 134 handling_angle = 45;
 135
 136 sm_inner_rad = (sm_inner_circum + sm_bolt_tighten_allow/2) / TAU;
 137 sm_outer_rad = sm_inner_rad + sm_main_thick;
 138
 139 smc_pos = [ 0, sm_inner_rad, 0 ];
 140
 141 smc_bolt_nut_dia = sm_bolt_nut_width / cos(30);
 142 smc_bolt_nut_eff_thick = sm_bolt_nut_thick + sm_bolt_tighten_allow;
 143
 144 smc_bolt_y = sm_bolt_dia/2 + sm_bolt_y_clear;
 145 smc_max_y = smc_bolt_y + sm_bolt_y_over
 146   + max(sm_bolt_head_dia/2, smc_bolt_nut_dia/2);
 147 smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
 148   + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
 149
 150 catch_cr = catch_knob_dia/2 + catch_stem_beside_gap;
 151 catch_strap_width = sm_main_width;
 152 catch_strap_thick = sm_main_thick;
 153 catch_stem_end_h = catch_stem_h;
 154 catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad)
 155                    - catch_pin_gap;
 156
 157 echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
 158
 159 $fs= coarse ? 2.5 : 0.5;
 160 $fa= coarse ? 5 : 1;
 161
 162 include <poster-tube-lid-parametric.scad>
 163
 164 // bayonet definition
 165
 166 bayo_a = [ bayo_entry_x, 0 ];
 167 bayo_p = [ 0, bayo_entry_z ];
 168 bayo_n = [ 0, bayo_behind-bayo_inramp_z ];
 169 bayo_m = [ bayo_inramp_x, bayo_behind ];
 170 bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope,  1 ];
 171 bayo_k = bayo_l + [ bayo_interf_width, 0 ];
 172 bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ];
 173 bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ];
 174 bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ];
 175 bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ];
 176
 177 bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0];
 178 bayo_d = [-bayo_a[0], bayo_a[1]] - [rivet_entry_width,0];
 179 bayo_c = bayo_d + [0,-5];
 180 bayo_b = bayo_a + [0,-5];
 181
 182 bayo_f = [ bayo_e[0], bayo_g[1] + (bayo_e[0] - bayo_g[0]) ];
 183
 184 bayo_polygon = [ bayo_a,
 185                  bayo_b,
 186                  bayo_c,
 187                  bayo_d,
 188                  bayo_e,
 189                  bayo_f,
 190                  bayo_g,
 191                  bayo_h,
 192                  bayo_i,
 193                  bayo_j,
 194                  bayo_k,
 195                  bayo_l,
 196                  bayo_m,
 197                  bayo_n,
 198                  bayo_p ];
 199
 200 echo(bayo_polygon);
 201
 202 // CATCH
 203
 204 //cppy6 = -catch_strap_width * 2/3;
 205
 206 cppxC = 0.34 * sm_inner_rad * TAU;
 207
 208 // catch pin
 209
 210 cppa = bayo_f + [1,-1] * catch_pin_slop;
 211 cppb = bayo_g + [1,-1] * catch_pin_slop;
 212 cppd = [ bayo_n[0] - catch_pin_slop, -catch_stalk_above_gap ];
 213 cppc = [ cppd[0], cppb[1] ];
 214 cpph = cppd + [0,-1] * catch_stem_h;
 215 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
 216 cppf = [ cppa[0], cppe[1] ];
 217 cppg = [ cppa[0], cpph[1] ];
 218 cppB = 0.5 * (cppf + cppe);
 219
 220 // catch assembly depression below pin
 221
 222 cppy6 = cppB[1] - (catch_knob_dia/2
 223                    + (cppc[1] - cppd[1])
 224                    + catch_stem_below_gap);
 225 cpp7 = [ cppB[0], cppy6 + catch_cr ];
 226 cpp11 = cpp7 + [1,0] * catch_cr;
 227 cppy9 = cppy6 + catch_strap_width * 1/3;
 228 cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
 229 cpp8 = cpp9 + [0,-1] * catch_cr;
 230 cpp10 = cpp8 + [-1,0] * catch_cr;
 231 cppC = [ cppxC, cpp9[1] ];
 232 cppD = cppC + [0,-1] * catch_strap_width;
 233
 234 // catch assembly stalk and so on
 235
 236 cppF = [ cppg[0] - catch_stem_stalk_eff_bend_rad, cppd[1] ];
 237 cpp4 = [ cppg[0] - catch_stem_len, cpph[1] ] + [1,-1] * catch_cr;
 238 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
 239 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
 240 cpp2r = cpp2 + [1,0] * catch_cr;
 241 cpp2d = cpp2 + [0,-1] * catch_cr;
 242 cpp3 = [ cpp2[0] + catch_cr * 2, cppd[1] - catch_cr ];
 243 cppA = [ -cppxC, cpp9[1] ];
 244 cppE = [ cppA[0], cppD[1] ];
 245
 246
 247 module MainProfile(){
 248   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
 249   difference(){
 250     union(){
 251       translate(main_cnr_pos){
 252         intersection(){
 253           difference(){
 254             circle(r = main_cnr);
 255             circle(r = main_cnr * 0.5);
 256           }
 257           square([10,10]);
 258         }
 259       }
 260       polygon([[ -top_middle_dr,        middle_bot_z      ],
 261                [ -top_middle_dr,        top_z             ],
 262                [ main_cnr_pos[0],       top_z             ],
 263                [ side_thick,            main_cnr_pos[1]   ],
 264                [ side_thick,            -side_height      ],
 265                [ side_taper,            -side_height      ],
 266                [ 0,                     -rivet_posn       ],
 267                [ 0,                     by_oring_z        ],
 268                [ -oring_x_rad,          by_oring_z        ],
 269                ],
 270               convexity=10);
 271     }
 272     translate([ oring_mid_dia/2 - main_dia/2, 0 ])
 273       hull(){
 274       translate([ 0, oring_y_rad ])
 275         scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ])
 276         circle(oring_thick/2);
 277       translate([ 0, oring_y_rad*2 - oring_thick/2 ])
 278         circle(oring_thick/2);
 279     }
 280   }
 281 }
 282
 283 module StrapHoopProfile(){
 284   circle(r = strap_hoop_thick/2);
 285 }
 286
 287 module StrapHoop(){ ////toplevel
 288   bigrad = strap_hoop_inside/2 + strap_hoop_thick/2;
 289   extralen = strap_hoop_thick * 5;
 290
 291   intersection(){
 292     rotate([strap_hoop_elevation, 0,0]){
 293       for (x= [ -1, +1 ] * bigrad) {
 294         translate([x, -extralen, 0])
 295           rotate([-90,0,0])
 296           linear_extrude(height= extralen + strap_hoop_strlen + 0.1,
 297                          convexity=10)
 298           StrapHoopProfile();
 299       }
 300       translate([0, strap_hoop_strlen, 0]){
 301         intersection(){
 302           rotate_extrude(convexity=10)
 303             translate([bigrad, 0,0])
 304             StrapHoopProfile();
 305           translate([0,50,0])
 306             cube([100,100,100], center=true);
 307         }
 308       }
 309     }
 310     translate([0, 50, 0])
 311       cube(100, center=true);
 312   }
 313 }
 314
 315 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
 316   // nom_rad > real_rad
 317   rotate([0,0, atan2(offset, nom_rad) ]){
 318     intersection(){
 319       translate([-offset, -10, 0])
 320         rotate([90,0,0])
 321         linear_extrude(height= nom_rad*2)
 322         children(0);
 323       translate([0,0, -25])
 324         cylinder(h=50, r= real_rad);
 325       translate([0,0, -25])
 326         linear_extrude(height= 50)
 327         polygon([ [ 0,0 ],
 328                   [ -slice_size, -real_rad*2 ],
 329                   [ +slice_size, -real_rad*2 ] ]);
 330     }
 331   }
 332 }
 333
 334 module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){
 335   offs = [ for (i=[ x_min :
 336                     slice_size :
 337                     x_max + slice_size ]) i ];
 338   echo (offs);
 339   for (off=offs)
 340     RotateProjectSlice(off, slice_size, nom_rad, real_rad)
 341     children(0);
 342 }
 343
 344 module BayonetCutout(){
 345   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
 346                 bayo_nom_rad,
 347                 bayo_real_rad)
 348     translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
 349     polygon(bayo_polygon, convexity=10);
 350 }
 351
 352 module ProfilesDemo(){ ////toplevel
 353   translate([-10,0]) MainProfile();
 354   translate([+10, -side_height]) polygon(bayo_polygon, convexity=10);
 355 }
 356
 357 module LimitForHandling(){ ////toplevel
 358   hull() for (r=[0,180])
 359     rotate([0,0,r]) {
 360       for (rs=[-1,+1]) {
 361         for (xd=[0,1]) {
 362           rotate([0,0, rs * handling_angle/2]) {
 363             translate([rs * xd * main_dia/2 * tan(handling_angle/2),
 364                        main_dia/2 + side_thick - main_cnr,
 365                        top_z - main_cnr]) {
 366               mirror([0,0,1])
 367                 cylinder(r= main_cnr, h=50);
 368               sphere(main_cnr);
 369             }
 370           }
 371         }
 372       }
 373     }
 374   hull() rotate_extrude(){
 375     translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
 376       circle(r = main_cnr);
 377       mirror([0,1]) square([ main_cnr, 50 ]);
 378     }
 379   }
 380   //cylinder(r= handling_dia/2, h=20);
 381 }
 382
 383 module Cover(){ ////toplevel
 384   render() difference(){
 385     intersection(){
 386       union(){
 387         rotate_extrude(convexity=10)
 388           translate([main_dia/2, 0])
 389           MainProfile();
 390         translate([0,0, middle_bot_z])
 391           cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
 392       }
 393       LimitForHandling();
 394     }
 395     for (r=[0,180]){
 396       rotate([0,0, r])
 397         translate([0,0, -side_height])
 398         BayonetCutout();
 399       rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
 400         translate([0,
 401                    oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
 402                    oring_y_rad * 1.5])
 403         rotate([-oring_rm_angle, 0, 0])
 404         mirror([0,0,1])
 405         cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
 406     }
 407     for (r=[0 : 60 : 179]) {
 408       rotate([0,0, r]) {
 409         height = top_thick_middle - brace_above_below*2;
 410         translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 411         cube(center=true, [ oring_bore - brace_end_shorter,
 412                             brace_hole_width, height ]);
 413       }
 414     }
 415   }
 416   for (r=[0,180])
 417     rotate([0,0,r])
 418       translate([-implheadcup_large_dia * .5 - implheadcup_thick/2,
 419                  -implheadcup_large_dia * .0,
 420                  middle_bot_z + 0.1])
 421       ImplHeadCup();
 422 //  translate(strap_hoop_thick * [-0.5, 0, +1])
 423 //    translate([handling_dia/2, 0, -side_height])
 424 //    rotate([0,180,0]) rotate([0,0,90])
 425 //    StrapHoop();
 426 }
 427
 428 module SavingHole(){
 429   translate([0,0, -10])
 430     cylinder(r= main_dia/2 - jig_rim, h=20);
 431 }
 432
 433 module Jig(){ ////toplevel
 434   difference(){
 435     union(){
 436       translate([0,0, -side_height]){
 437         cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
 438       }
 439       translate([-jig_mark_rad, 0, jig_thick - jig_mark])
 440         cube([jig_mark_rad*2, jig_mark, jig_mark]);
 441     }
 442     translate([0,0, -side_height-1])
 443       cylinder(r= main_dia/2, h= side_height + 1);
 444     SavingHole();
 445     translate([0,0, -rivet_posn])
 446       rotate([90, 0,0])
 447       translate([0,0, -100])
 448       cylinder(r= jig_hole_dia/2, h = 200);
 449   }
 450 }
 451
 452 module CoverTest2(){ ////toplevel
 453   difference(){
 454     Cover();
 455     SavingHole();
 456   }
 457 }
 458
 459 module CoverTest1(){ ////toplevel
 460   difference(){
 461     CoverTest2();
 462     difference(){
 463       for (r= [ 40, 147 ]){
 464         rotate([0,0, r]){
 465           translate([0,0, -10]) {
 466             cube([ main_dia*3, main_dia * .53, 18], center=true);
 467           }
 468         }
 469       }
 470 //      translate([ 50, 0, 0 ])
 471 //      cube([ 100,
 472 //             strap_hoop_inside + strap_hoop_thick*2 + 1,
 473 //             100 ],
 474 //           center=true);
 475     }
 476   }
 477 }
 478
 479 module ImplHeadCupTest(){ ////toplevel
 480   for (r=[0,180])
 481     rotate([0,0,r])
 482       translate([-17,0,0])
 483       ImplHeadCup();
 484 }
 485
 486 module SomeStrap(){
 487   // children(0) is to add, (1) subtract
 488   difference(){
 489     union(){
 490       cylinder(r=sm_outer_rad, h=sm_main_width);
 491       StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
 492                            smc_max_y,
 493                            sm_closure_cnr);
 494       children(0);
 495     }
 496     translate([0,0,-1])
 497       cylinder(r=sm_inner_rad, h=sm_main_width+2);
 498     translate(smc_pos)
 499       StrapMountBolt(10);
 500     translate(smc_pos)
 501       cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
 502     children(1);
 503   }
 504 }
 505
 506 module StrapMountBolt(l_delta){ ///toplevel
 507   // positioned relative to smc_pos
 508   translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
 509              smc_bolt_y,
 510              sm_main_width/2]){
 511     translate([ -sm_bolt_shaft/2-1, 0,0 ]){
 512       rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
 513     }
 514     translate([ -sm_bolt_shaft/2, 0,0 ])
 515       rotate([0,-90,0])
 516       cylinder($fn=6, r=smc_bolt_nut_dia/2,
 517                h=smc_bolt_nut_eff_thick + l_delta);
 518     translate([ sm_bolt_shaft/2, 0,0 ])
 519       rotate([0,90,0])
 520       cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
 521   }
 522 }
 523
 524 module StrapMountProtrusion(half_x, max_y, cnr){
 525   translate(smc_pos){
 526     linear_extrude(height=sm_main_width, convexity=10){
 527       hull(){
 528         for (m = [0,1]) mirror([m,0,0]) {
 529           translate([-(half_x - cnr), max_y - cnr])
 530             circle(r=cnr);
 531           translate([-half_x, -sm_inner_rad])
 532             square([1,1]);
 533         }
 534       }
 535     }
 536   }
 537 }
 538
 539 module StrapMount(){ ////toplevel
 540   SomeStrap(){
 541     rotate([0,0,180]){
 542       StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
 543                            strap_hoop_thick,
 544                            sm_closure_cnr);
 545       translate(smc_pos +
 546                 [0,0, sm_main_width] +
 547                 strap_hoop_thick * [ 0, 0.5, -1.0 ])
 548         StrapHoop();
 549     }
 550     union(){ };
 551   }
 552 }
 553
 554 module CatchAssemblyCoreProfile(){
 555   difference(){
 556     union(){
 557       hull(){
 558         translate(cpp3) circle(r= catch_cr);
 559         polygon([ cpp3,
 560                   cpp2r,
 561                   cpp5,
 562                   cpph,
 563                   cppd
 564                   ]);
 565       }
 566       polygon([cppD,
 567                cppC,
 568                cpp9,
 569                cpp10,
 570                cpp11,
 571                cpp4,
 572                cpp2r,
 573                cpp2d,
 574                cppA,
 575                cppE
 576                ]);
 577       translate(cpp8) circle(r= catch_cr);
 578     }
 579     hull(){
 580       translate(cpp4) circle(r= catch_cr);
 581       translate(cpp5) circle(r= catch_cr);
 582       translate(cpp7) circle(r= catch_cr);
 583       polygon([cpp4,
 584                cppg,
 585                cpph,
 586                cpp10,
 587                cpp11,
 588                ]);
 589     }
 590   }
 591 }
 592
 593 module CatchCoreProfile(){ ////toplevel
 594   hull(){
 595     translate(cppB) circle(r= catch_knob_dia/2);
 596     polygon([cpp4,
 597              cppB,
 598              cpp3]);
 599   }
 600   translate(cpp8)
 601     circle(catch_cr);
 602   polygon([
 603            cpp4,
 604            cppB,
 605            cpp3,
 606            cpp2,
 607            cpp1,
 608            cpp12,
 609            ]);
 610   difference(){
 611     polygon([ cpp4,
 612               cpp3,
 613               cpp12,
 614               cppA,
 615               cppE,
 616               cppD,
 617               cppC,
 618               cpp9,
 619               cpp10,
 620               cpp11,
 621               cpp7,
 622               cpp5,
 623               ], convexity=10);
 624     hull(){
 625       translate(cpp7) circle(r= catch_cr);
 626       polygon([ cpp7,
 627                 cpp5,
 628                 cpp11 ]);
 629     }
 630     hull(){
 631       translate(cpp6) circle(catch_cr);
 632       polygon([ cppA,
 633                 cpp0,
 634                 cpp1 ]);
 635     }
 636   }
 637 }
 638
 639 module CatchCore(){ /////toplevel
 640   linear_extrude(height=catch_strap_thick, convexity=10)
 641     CatchAssemblyCoreProfile();
 642
 643   translate(concat(cppB,[0])) hull(){
 644     translate([0,0, catch_knob_height - catch_knob_dia/2])
 645       sphere(r = catch_knob_dia/2);
 646     cylinder(r = catch_knob_dia/2, h = 0.1);
 647   }
 648 }
 649
 650 module CatchPreDistort(){ /////toplevel
 651   scale(100 / sm_inner_rad)
 652     rotate([90,0,0])
 653     CatchCore();
 654 }
 655
 656 module CatchAssembly(){ /////toplevel
 657   rotate([0,0, -0.5 * (cpp1[0] + cpp2[0]) / sm_inner_rad * 360/TAU])
 658     translate([0,0, catch_strap_width])
 659     scale(sm_inner_rad / 100)
 660     import(str("poster-tube-lid,CatchPostDistort-fa",
 661                (coarse ? 20 : 3),
 662                ".stl"),
 663            convexity=20);
 664
 665   SomeStrap(){
 666     union(){ }
 667     union(){
 668       translate([-200, -200, -200])
 669         cube([400, 200, 400]);
 670     }
 671   }
 672 }
 673
 674 module CatchDemo(){ /////toplevel
 675   color("blue") translate([0,0,
 676              -catch_strap_width
 677              -cpp0[1]
 678              ])
 679     CatchAssembly();
 680   translate([0,0,+side_height
 681              ])
 682     Cover();
 683 }
 684
 685 module CatchDemoS(){ /////toplevel
 686   color("blue") translate([0,0,
 687              -catch_strap_width
 688              -cpp0[1]
 689              ])
 690     CatchAssembly();
 691   intersection(){
 692     translate([0,0,+side_height
 693                ])
 694       Cover();
 695     mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
 696   }
 697   color("black")
 698     translate([0,-33,0])
 699     cube([6.15, 2,2], center=true);
 700 }
 701
 702 module CatchPinProfileDemo(){ /////toplevel
 703   echo("G ",
 704        cpp2[0] - cpp1[0],
 705        bayo_n[0] - bayo_e[0]);
 706   color("blue") translate([-cpp2[0],
 707                            -cpp2[1],
 708                            +1,
 709              ])
 710     CatchCoreProfile();
 711   polygon(bayo_polygon, convexity=10);
 712 }
 713
 714 //ProfilesDemo();
 715 //BayonetCutout();
 716 //MainProfile();
 717 //Cover();
 718 //Jig();
 719 //CoverTest();