poster-tube-lid.scad

   1 // -*- C -*-
   2
   3 include <funcs.scad>
   4
   5 coarse = false;
   6
   7 main_dia = 71.2 + 0.50 - 2.26;
   8 top_thick_middle = 4;
   9 top_thick_by_oring = 3.0;
  10 top_middle_dr = 11;
  11
  12 main_cnr = 6.0;
  13
  14 min_wall = 3;
  15
  16 rivet_posn = 6.0 + 0.30;
  17 rivet_thick = 1.67;
  18 rivet_width = 4.15 + 1.0;
  19 rivet_tall = 5.51 + 1.49;
  20
  21 over_rivet_wall = 1.0;
  22 side_rivet_gap = 1.5;
  23 inside_rivet_gap = 1.5;
  24
  25 bayo_interf = 0.30;
  26 bayo_behind = 3.5;
  27 bayo_interf_width = 2.0;
  28 bayo_interf_slope = 0.5;
  29
  30 oring_thick = 5.0;
  31 oring_bore = 62.0;
  32
  33 oring_upper_embed_angle = 80;
  34 oring_compress = 0.1; // proportion
  35 oring_compress_more = 0.2;
  36
  37 oring_rm_beside = 8;
  38 oring_rm_scale = 2.0;
  39 oring_rm_angle = 20;
  40
  41 side_taper = 1.0;
  42
  43 bayo_gap = 6.0;
  44
  45 bayo_entry = bayo_behind/3;
  46
  47 bayo_slice_size = coarse ? 5 : 1;
  48
  49 brace_hole_width = 1.0;
  50 brace_above_below = 1.2;
  51 brace_end_shorter = 0.3;
  52
  53 jig_thick = 1.4;
  54 jig_hole_dia = 3.0;
  55 jig_rim = 5;
  56 jig_mark = 5;
  57
  58 strap_hoop_thick = 6;
  59 strap_hoop_inside = 10;
  60 strap_hoop_strlen = 10;
  61 strap_hoop_elevation = 45;
  62
  63 sm_inner_circum = 218 - 1.90 - 1.00 - 0.50;
  64 sm_main_thick = 2.0;
  65 sm_main_width = 20;
  66
  67 sm_bolt_dia = 3.5 + 0.1;
  68 sm_bolt_shaft = 21.9;
  69 sm_bolt_head_dia = 6.94 + 1.0;
  70 sm_bolt_head_thick = 2.14;
  71 sm_bolt_nut_width = 5.89 + 0.25;
  72 sm_bolt_nut_thick = 3.68;
  73 sm_bolt_tighten_allow = 2.0;
  74
  75 sm_bolt_y_clear = 0.75;
  76 sm_bolt_y_over = 0.5;
  77
  78 sm_closure_cnr = 3.0;
  79
  80 catch_stalk_h = 3;
  81 catch_stalk_len = 50;
  82
  83 catch_pin_slop = 0.25; // each side, and above
  84 catch_pin_slop_x_extra = 0.0; // only on one side
  85 catch_stalk_above_gap = 1.5;
  86 catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
  87
  88 catch_stalk_base_width = 15;
  89
  90 catch_knob_dia = 6;
  91 catch_knob_above_gap = 8;
  92 catch_knob_height = 6;
  93
  94 catch_stalk_below_gap = 1.0;
  95 catch_stalk_beside_gap = 2.0;
  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_stalk_beside_gap;
 151 catch_strap_width = sm_main_width;
 152 catch_strap_thick = sm_main_thick;
 153
 154 echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
 155
 156 $fs= coarse ? 2.5 : 0.5;
 157 $fa= coarse ? 5 : 1;
 158
 159 include <poster-tube-lid-parametric.scad>
 160
 161 // bayonet definition
 162
 163 bayo_a = [ bayo_entry_x, 0 ];
 164 bayo_p = [ 0, bayo_entry_z ];
 165 bayo_n = [ 0, bayo_behind-bayo_inramp_z ];
 166 bayo_m = [ bayo_inramp_x, bayo_behind ];
 167 bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope,  1 ];
 168 bayo_k = bayo_l + [ bayo_interf_width, 0 ];
 169 bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ];
 170 bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ];
 171 bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ];
 172 bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ];
 173
 174 bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0];
 175 bayo_d = [-bayo_a[0], bayo_a[1]] - [rivet_entry_width,0];
 176 bayo_c = bayo_d + [0,-5];
 177 bayo_b = bayo_a + [0,-5];
 178
 179 bayo_f = [ bayo_e[0], bayo_g[1] + (bayo_e[0] - bayo_g[0]) ];
 180
 181 bayo_polygon = [ bayo_a,
 182                  bayo_b,
 183                  bayo_c,
 184                  bayo_d,
 185                  bayo_e,
 186                  bayo_f,
 187                  bayo_g,
 188                  bayo_h,
 189                  bayo_i,
 190                  bayo_j,
 191                  bayo_k,
 192                  bayo_l,
 193                  bayo_m,
 194                  bayo_n,
 195                  bayo_p ];
 196
 197 echo(bayo_polygon);
 198
 199 // CATCH
 200
 201 //cppy6 = -catch_strap_width * 2/3;
 202
 203 cppxC = 0.41 * sm_inner_rad * TAU;
 204
 205 // catch pin
 206
 207 cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
 208 // radius scaling due to nom and actual radius difference in
 209 // bayo entry construction
 210
 211 cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 212 cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 213 cppd = [ bayo_n[0]
 214          - catch_pin_slop - catch_pin_slop_x_extra,
 215          -catch_stalk_above_gap ];
 216 cppc = [ cppd[0], cppb[1] ];
 217 cpph = cppd + [0,-1] * catch_stalk_h;
 218 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
 219 cppf = [ cppa[0], cppe[1] ];
 220 cppg = [ cppa[0], cpph[1] ];
 221 cppB = 0.5 * (cppf + cppe);
 222
 223 echo("RR", sm_inner_rad / bayo_nom_rad);
 224
 225 // catch assembly depression below pin
 226
 227 cppy6 = cppB[1] - (catch_knob_dia/2
 228                    + (cppc[1] - cppd[1])
 229                    + catch_stalk_below_gap);
 230 cpp7 = [ cppB[0], cppy6 + catch_cr ];
 231 cpp11 = cpp7 + [1,0] * catch_cr;
 232 cppy9 = cppy6 + catch_strap_width * 1/3;
 233 cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
 234 cpp8 = cpp9 + [0,-1] * catch_cr;
 235 cpp10 = cpp8 + [-1,0] * catch_cr;
 236 cppC = [ cppxC, cpp9[1] ];
 237 cppD = cppC + [0,-1] * catch_strap_width;
 238
 239 // catch assembly stalk and so on
 240
 241 cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
 242 cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
 243 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
 244 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
 245 cpp2r = cpp2 + [1,0] * catch_cr;
 246 cpp2d = cpp2 + [0,-1] * catch_cr;
 247 cpp3 = [ cpp2[0] + catch_cr * 2, cppd[1] - catch_cr ];
 248 cppA = [ -cppxC, cpp9[1] ];
 249 cppE = [ cppA[0], cppD[1] ];
 250
 251 catch_assembly_dy = -cppy9 + catch_strap_width;
 252
 253
 254 module MainProfile(){
 255   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
 256   difference(){
 257     union(){
 258       translate(main_cnr_pos){
 259         intersection(){
 260           difference(){
 261             circle(r = main_cnr);
 262             circle(r = main_cnr * 0.5);
 263           }
 264           square([10,10]);
 265         }
 266       }
 267       polygon([[ -top_middle_dr,        middle_bot_z      ],
 268                [ -top_middle_dr,        top_z             ],
 269                [ main_cnr_pos[0],       top_z             ],
 270                [ side_thick,            main_cnr_pos[1]   ],
 271                [ side_thick,            -side_height      ],
 272                [ side_taper,            -side_height      ],
 273                [ 0,                     -rivet_posn       ],
 274                [ 0,                     by_oring_z        ],
 275                [ -oring_x_rad,          by_oring_z        ],
 276                ],
 277               convexity=10);
 278     }
 279     translate([ oring_mid_dia/2 - main_dia/2, 0 ])
 280       hull(){
 281       translate([ 0, oring_y_rad ])
 282         scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ])
 283         circle(oring_thick/2);
 284       translate([ 0, oring_y_rad*2 - oring_thick/2 ])
 285         circle(oring_thick/2);
 286     }
 287   }
 288 }
 289
 290 module StrapHoopProfile(){
 291   circle(r = strap_hoop_thick/2);
 292 }
 293
 294 module StrapHoop(){ ////toplevel
 295   bigrad = strap_hoop_inside/2 + strap_hoop_thick/2;
 296   extralen = strap_hoop_thick * 5;
 297
 298   intersection(){
 299     rotate([strap_hoop_elevation, 0,0]){
 300       for (x= [ -1, +1 ] * bigrad) {
 301         translate([x, -extralen, 0])
 302           rotate([-90,0,0])
 303           linear_extrude(height= extralen + strap_hoop_strlen + 0.1,
 304                          convexity=10)
 305           StrapHoopProfile();
 306       }
 307       translate([0, strap_hoop_strlen, 0]){
 308         intersection(){
 309           rotate_extrude(convexity=10)
 310             translate([bigrad, 0,0])
 311             StrapHoopProfile();
 312           translate([0,50,0])
 313             cube([100,100,100], center=true);
 314         }
 315       }
 316     }
 317     translate([0, 50, 0])
 318       cube(100, center=true);
 319   }
 320 }
 321
 322 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
 323   // nom_rad > real_rad
 324   rotate([0,0, atan2(offset, nom_rad) ]){
 325     intersection(){
 326       translate([-offset, -10, 0])
 327         rotate([90,0,0])
 328         linear_extrude(height= nom_rad*2)
 329         children(0);
 330       translate([0,0, -25])
 331         cylinder(h=50, r= real_rad);
 332       translate([0,0, -25])
 333         linear_extrude(height= 50)
 334         polygon([ [ 0,0 ],
 335                   [ -slice_size, -real_rad*2 ],
 336                   [ +slice_size, -real_rad*2 ] ]);
 337     }
 338   }
 339 }
 340
 341 module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){
 342   offs = [ for (i=[ x_min :
 343                     slice_size :
 344                     x_max + slice_size ]) i ];
 345   echo (offs);
 346   for (off=offs)
 347     RotateProjectSlice(off, slice_size, nom_rad, real_rad)
 348     children(0);
 349 }
 350
 351 module BayonetCutout(){
 352   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
 353                 bayo_nom_rad,
 354                 bayo_real_rad)
 355     translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
 356     polygon(bayo_polygon, convexity=10);
 357 }
 358
 359 module ProfilesDemo(){ ////toplevel
 360   translate([-10,0]) MainProfile();
 361   translate([+10, -side_height]) polygon(bayo_polygon, convexity=10);
 362 }
 363
 364 module LimitForHandling(){ ////toplevel
 365   hull() for (r=[0,180])
 366     rotate([0,0,r]) {
 367       for (rs=[-1,+1]) {
 368         for (xd=[0,1]) {
 369           rotate([0,0, rs * handling_angle/2]) {
 370             translate([rs * xd * main_dia/2 * tan(handling_angle/2),
 371                        main_dia/2 + side_thick - main_cnr,
 372                        top_z - main_cnr]) {
 373               mirror([0,0,1])
 374                 cylinder(r= main_cnr, h=50);
 375               sphere(main_cnr);
 376             }
 377           }
 378         }
 379       }
 380     }
 381   hull() rotate_extrude(){
 382     translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
 383       circle(r = main_cnr);
 384       mirror([0,1]) square([ main_cnr, 50 ]);
 385     }
 386   }
 387   //cylinder(r= handling_dia/2, h=20);
 388 }
 389
 390 module Cover(){ ////toplevel
 391   render() difference(){
 392     intersection(){
 393       union(){
 394         rotate_extrude(convexity=10)
 395           translate([main_dia/2, 0])
 396           MainProfile();
 397         translate([0,0, middle_bot_z])
 398           cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
 399       }
 400       LimitForHandling();
 401     }
 402     for (r=[0,180]){
 403       rotate([0,0, r])
 404         translate([0,0, -side_height])
 405         BayonetCutout();
 406       rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
 407         translate([0,
 408                    oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
 409                    oring_y_rad * 1.5])
 410         rotate([-oring_rm_angle, 0, 0])
 411         mirror([0,0,1])
 412         cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
 413     }
 414     for (r=[0 : 60 : 179]) {
 415       rotate([0,0, r]) {
 416         height = top_thick_middle - brace_above_below*2;
 417         translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 418         cube(center=true, [ oring_bore - brace_end_shorter,
 419                             brace_hole_width, height ]);
 420       }
 421     }
 422   }
 423   for (r=[0,180])
 424     rotate([0,0,r])
 425       translate([-implheadcup_large_dia * .5 - implheadcup_thick/2,
 426                  -implheadcup_large_dia * .0,
 427                  middle_bot_z + 0.1])
 428       ImplHeadCup();
 429 //  translate(strap_hoop_thick * [-0.5, 0, +1])
 430 //    translate([handling_dia/2, 0, -side_height])
 431 //    rotate([0,180,0]) rotate([0,0,90])
 432 //    StrapHoop();
 433 }
 434
 435 module SavingHole(){
 436   translate([0,0, -10])
 437     cylinder(r= main_dia/2 - jig_rim, h=20);
 438 }
 439
 440 module Jig(){ ////toplevel
 441   difference(){
 442     union(){
 443       translate([0,0, -side_height]){
 444         cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
 445       }
 446       translate([-jig_mark_rad, 0, jig_thick - jig_mark])
 447         cube([jig_mark_rad*2, jig_mark, jig_mark]);
 448     }
 449     translate([0,0, -side_height-1])
 450       cylinder(r= main_dia/2, h= side_height + 1);
 451     SavingHole();
 452     translate([0,0, -rivet_posn])
 453       rotate([90, 0,0])
 454       translate([0,0, -100])
 455       cylinder(r= jig_hole_dia/2, h = 200);
 456   }
 457 }
 458
 459 module CoverTest2(){ ////toplevel
 460   difference(){
 461     Cover();
 462     SavingHole();
 463   }
 464 }
 465
 466 module CoverTest1(){ ////toplevel
 467   difference(){
 468     CoverTest2();
 469     difference(){
 470       for (r= [ 40, 147 ]){
 471         rotate([0,0, r]){
 472           translate([0,0, -10]) {
 473             cube([ main_dia*3, main_dia * .53, 18], center=true);
 474           }
 475         }
 476       }
 477 //      translate([ 50, 0, 0 ])
 478 //      cube([ 100,
 479 //             strap_hoop_inside + strap_hoop_thick*2 + 1,
 480 //             100 ],
 481 //           center=true);
 482     }
 483   }
 484 }
 485
 486 module ImplHeadCupTest(){ ////toplevel
 487   for (r=[0,180])
 488     rotate([0,0,r])
 489       translate([-17,0,0])
 490       ImplHeadCup();
 491 }
 492
 493 module SomeStrap(){
 494   // children(0) is to add, (1) subtract
 495   difference(){
 496     union(){
 497       cylinder(r=sm_outer_rad, h=sm_main_width);
 498       StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
 499                            smc_max_y,
 500                            sm_closure_cnr);
 501       children(0);
 502     }
 503     translate([0,0,-1])
 504       cylinder(r=sm_inner_rad, h=sm_main_width+2);
 505     translate(smc_pos)
 506       StrapMountBolt(10);
 507     translate(smc_pos)
 508       cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
 509     children(1);
 510   }
 511 }
 512
 513 module StrapMountBolt(l_delta){ ///toplevel
 514   // positioned relative to smc_pos
 515   translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
 516              smc_bolt_y,
 517              sm_main_width/2]){
 518     translate([ -sm_bolt_shaft/2-1, 0,0 ]){
 519       rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
 520     }
 521     translate([ -sm_bolt_shaft/2, 0,0 ])
 522       rotate([0,-90,0])
 523       cylinder($fn=6, r=smc_bolt_nut_dia/2,
 524                h=smc_bolt_nut_eff_thick + l_delta);
 525     translate([ sm_bolt_shaft/2, 0,0 ])
 526       rotate([0,90,0])
 527       cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
 528   }
 529 }
 530
 531 module StrapMountProtrusion(half_x, max_y, cnr){
 532   translate(smc_pos){
 533     linear_extrude(height=sm_main_width, convexity=10){
 534       hull(){
 535         for (m = [0,1]) mirror([m,0,0]) {
 536           translate([-(half_x - cnr), max_y - cnr])
 537             circle(r=cnr);
 538           translate([-half_x, -sm_inner_rad])
 539             square([1,1]);
 540         }
 541       }
 542     }
 543   }
 544 }
 545
 546 module StrapMount(){ ////toplevel
 547   SomeStrap(){
 548     rotate([0,0,180]){
 549       StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
 550                            strap_hoop_thick,
 551                            sm_closure_cnr);
 552       translate(smc_pos +
 553                 [0,0, sm_main_width] +
 554                 strap_hoop_thick * [ 0, 0.5, -1.0 ])
 555         StrapHoop();
 556     }
 557     union(){ };
 558   }
 559 }
 560
 561 module CatchAssemblyCoreProfile(){
 562   difference(){
 563     union(){
 564       hull(){
 565         translate(cpp3) circle(r= catch_cr);
 566         polygon([ cpp3,
 567                   cpp2r,
 568                   cpp5,
 569                   cpph,
 570                   cppd
 571                   ]);
 572       }
 573       polygon([cppD,
 574                cppC,
 575                cpp9,
 576                cpp10,
 577                cpp11,
 578                cpp4,
 579                cpp2r,
 580                cpp2d,
 581                cppA,
 582                cppE
 583                ]);
 584       translate(cpp8) circle(r= catch_cr);
 585     }
 586     hull(){
 587       translate(cpp4) circle(r= catch_cr);
 588       translate(cpp5) circle(r= catch_cr);
 589       translate(cpp7) circle(r= catch_cr);
 590       polygon([cpp4,
 591                cppg,
 592                cpph,
 593                cpp10,
 594                cpp11,
 595                ]);
 596     }
 597     translate(cpp2) circle(r= catch_cr);
 598   }
 599 }
 600
 601 module CatchHeadProfile(){
 602   intersection(){
 603     translate(cppF){
 604       difference(){
 605         circle(r = dist2d(cppF, cppd));
 606         //circle(r = dist2d(cppF, cppa));
 607       }
 608     }
 609     polygon([ cppa,
 610               cppg,
 611               cpph,
 612               cppd,
 613               cppc,
 614               cppb ]);
 615   }
 616   polygon([ cppd,
 617             cppg,
 618             cppf,
 619             cppe,
 620             cpph ]);
 621 }
 622
 623
 624 module CatchCore(){ /////toplevel
 625   linear_extrude(height=catch_strap_thick, convexity=10)
 626     CatchAssemblyCoreProfile();
 627
 628   linear_extrude(height=catch_strap_thick, convexity=10)
 629     CatchHeadProfile();
 630
 631   translate(concat(cppB,[0])) hull(){
 632     translate([0,0, catch_knob_height - catch_knob_dia/2])
 633       sphere(r = catch_knob_dia/2);
 634     cylinder(r = catch_knob_dia/2, h = 0.1);
 635   }
 636 }
 637
 638 module CatchPreDistort(){ /////toplevel
 639   scale(100 / sm_inner_rad)
 640     rotate([90,0,0])
 641     CatchCore();
 642 }
 643
 644 module CatchAssembly(){ /////toplevel
 645   rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
 646     translate([0,0, catch_assembly_dy])
 647     scale(sm_inner_rad / 100)
 648     import(str("poster-tube-lid,CatchPostDistort-fa",
 649                (coarse ? 20 : 3),
 650                ".stl"),
 651            convexity=20);
 652
 653   SomeStrap(){
 654     union(){ }
 655     union(){
 656       translate([-200, -200, -200])
 657         cube([400, 200, 400]);
 658     }
 659   }
 660 }
 661
 662 module CatchDemo(){ /////toplevel
 663   color("blue") translate([0,0,
 664                            -catch_assembly_dy
 665              ])
 666     CatchAssembly();
 667   translate([0,0,+side_height
 668              ])
 669     Cover();
 670 }
 671
 672 module CatchDemoS(){ /////toplevel
 673   color("blue") translate([0,0,
 674              -catch_assembly_dy
 675              ])
 676     CatchAssembly();
 677   intersection(){
 678     translate([0,0,+side_height
 679                ])
 680       Cover();
 681     mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
 682   }
 683   color("black")
 684     translate([0,-33,0])
 685     cube([6.15, 2,2], center=true);
 686 }
 687
 688 module CatchPinProfileDemo(){ /////toplevel
 689   echo("G ",
 690        cpp2[0] - cpp1[0],
 691        bayo_n[0] - bayo_e[0]);
 692   color("blue") translate([0,0,
 693                            +1,
 694              ]) {
 695     CatchAssemblyCoreProfile();
 696     CatchHeadProfile();
 697   }
 698   polygon(bayo_polygon, convexity=10);
 699 }
 700
 701 //ProfilesDemo();
 702 //BayonetCutout();
 703 //MainProfile();
 704 //Cover();
 705 //Jig();
 706 //CoverTest();