poster-tube-lid.scad

   1 // -*- C -*-
   2
   3 include <funcs.scad>
   4
   5 coarse = false;
   6 enable_head_cups = false;
   7
   8 main_dia = 71.2 + 0.50 - 2.26;
   9 top_thick_middle = 4;
  10 top_thick_by_oring = 3.0;
  11 top_middle_dr = 11;
  12
  13 main_cnr = 6.0;
  14
  15 min_wall = 3;
  16
  17 rivet_posn = 6.0 + 0.30;
  18 rivet_thick = 1.67;
  19 rivet_width = 4.15 + 1.0;
  20 rivet_tall = 5.51 + 1.49;
  21
  22 over_rivet_wall = 1.0;
  23 side_rivet_gap = 1.5;
  24 inside_rivet_gap = 1.5;
  25
  26 bayo_interf = 0.30;
  27 bayo_behind = 8.5;
  28 bayo_interf_width = 2.0;
  29 bayo_interf_slope = 0.5;
  30
  31 oring_thick = 5.0;
  32 oring_bore = 62.0;
  33
  34 oring_upper_embed_angle = 80;
  35 oring_compress = 0.1; // proportion
  36 oring_compress_more = 0.2;
  37
  38 oring_rm_beside = 8;
  39 oring_rm_scale = 2.0;
  40 oring_rm_angle = 20;
  41
  42 side_taper = 1.0;
  43
  44 bayo_gap = 6.0;
  45
  46 bayo_entry = 1.167;
  47 bayo_inramp = 0.9;
  48
  49 bayo_slice_size = coarse ? 5 : 1;
  50
  51 brace_hole_width = 1.0;
  52 brace_above_below = 1.2;
  53 brace_end_shorter = 0.3;
  54
  55 jig_thick = 1.4;
  56 jig_hole_dia = 3.0;
  57 jig_rim = 5;
  58 jig_mark = 5;
  59
  60 strap_hoop_thick = 6;
  61 strap_hoop_inside = 10;
  62 strap_hoop_strlen = 10;
  63 strap_hoop_elevation = 45;
  64
  65 sm_inner_circum = 218 - 1.90 - 1.00 - 0.50;
  66 sm_main_thick = 2.0;
  67 sm_main_width = 20;
  68
  69 sm_bolt_dia = 3.5 + 0.1;
  70 sm_bolt_shaft = 21.0;
  71 sm_bolt_head_dia = 6.94 + 1.0;
  72 sm_bolt_head_thick = 2.14;
  73 sm_bolt_nut_width = 5.89 + 0.25;
  74 sm_bolt_nut_thick = 3.68;
  75 sm_bolt_tighten_allow = 2.0;
  76
  77 sm_bolt_y_clear = 0.75;
  78 sm_bolt_y_over = 0.5;
  79
  80 sm_closure_cnr = 3.0;
  81
  82 catch_stalk_h = 4.5;
  83 catch_stalk_len = 50;
  84 catch_tip_th = 4;
  85 catch_head_th = 3;
  86
  87 catch_pin_slop = 0.25; // each side, and above
  88 catch_pin_slop_x_extra = 0.0; // only on one side
  89 catch_stalk_above_gap = 1.5;
  90 catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
  91
  92 catch_strap_width = 12;
  93 catch_stalk_base_width = 15;
  94
  95 catch_knob_dia = 6;
  96 catch_knob_above_gap = 5;
  97 catch_knob_height = 3.0;
  98
  99 catch_stalk_below_gap = 1.0;
 100 catch_stalk_beside_gap = 2.0;
 101
 102 // calculated
 103
 104 TAU = PI*2;
 105
 106 bayo_entry_x = bayo_entry;
 107 bayo_entry_z = bayo_entry;
 108 bayo_inramp_x = bayo_inramp;
 109 bayo_inramp_z = bayo_inramp;
 110
 111 oring_mid_dia = oring_bore + oring_thick;
 112 oring_outer_dia = oring_mid_dia + oring_thick;
 113
 114 oring_oblate = (1 - oring_compress);
 115
 116 oring_y_rad = oring_thick/2 * oring_oblate;
 117 oring_x_rad = oring_thick/2 / oring_oblate;
 118
 119 by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle));
 120
 121 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 122 side_thick = rivet_tall + over_rivet_wall;
 123
 124 top_z = top_thick_by_oring + oring_y_rad + by_oring_z;
 125
 126 middle_bot_z = top_z - top_thick_middle;
 127
 128 bayo_top_z = bayo_behind + bayo_gap;
 129
 130 bayo_nom_rad = main_dia/2 + side_thick;
 131 bayo_real_rad = main_dia/2 + rivet_tall;
 132
 133 rivet_entry_width = rivet_width + side_rivet_gap;
 134
 135 jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
 136
 137 handling_dia = oring_bore + oring_thick*2 + min_wall*2;
 138 handling_angle = 45;
 139
 140 sm_inner_rad = (sm_inner_circum + sm_bolt_tighten_allow/2) / TAU;
 141 sm_outer_rad = sm_inner_rad + sm_main_thick;
 142
 143 smc_pos = [ 0, sm_inner_rad, 0 ];
 144
 145 smc_bolt_nut_dia = sm_bolt_nut_width / cos(30);
 146 smc_bolt_nut_eff_thick = sm_bolt_nut_thick + sm_bolt_tighten_allow;
 147
 148 smc_bolt_y = sm_bolt_dia/2 + sm_bolt_y_clear;
 149 smc_max_y = smc_bolt_y + sm_bolt_y_over
 150   + max(sm_bolt_head_dia/2, smc_bolt_nut_dia/2);
 151 smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
 152   + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
 153
 154 catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
 155 catch_strap_thick = sm_main_thick;
 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 cppxC = 0.41 * sm_inner_rad * TAU;
 205
 206 // catch pin
 207
 208 cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
 209 // radius scaling due to nom and actual radius difference in
 210 // bayo entry construction
 211
 212 cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 213 cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 214 cppd = [ bayo_n[0]
 215          - catch_pin_slop - catch_pin_slop_x_extra,
 216          -catch_stalk_above_gap ];
 217 cppi = [ cppa[0], cppd[1] ];
 218 cppc = [ cppd[0], cppb[1] ];
 219 cpph = cppd + [0,-1] * catch_stalk_h;
 220 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
 221 cppf = [ cppa[0], cppe[1] ];
 222 cppg = [ cppa[0], cpph[1] ];
 223 cppB = 0.5 * (cppf + cppe);
 224
 225 echo("RR", sm_inner_rad / bayo_nom_rad);
 226
 227 // catch assembly depression below pin
 228
 229 cppy6 = cppB[1] - (catch_knob_dia/2
 230                    + (cppc[1] - cppd[1])
 231                    + catch_stalk_below_gap);
 232 cpp7 = [ cppB[0], cppy6 + catch_cr ];
 233 cpp11 = cpp7 + [1,0] * catch_cr;
 234 cppy9 = cppy6 + catch_strap_width * 1/3;
 235 cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
 236 cpp8 = cpp9 + [0,-1] * catch_cr;
 237 cpp10 = cpp8 + [-1,0] * catch_cr;
 238 cppC = [ cppxC, cpp9[1] ];
 239 cppD = cppC + [0,-1] * catch_strap_width;
 240
 241 // catch assembly stalk and so on
 242
 243 catch_cr3 = catch_cr + catch_stalk_h;
 244
 245 cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
 246 cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
 247 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
 248 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
 249 cpp2r = cpp2 + [1,0] * catch_cr;
 250 cpp2d = cpp2 + [0,-1] * catch_cr;
 251 cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
 252 cppA = [ -cppxC, cpp9[1] ];
 253 cppE = [ cppA[0], cppD[1] ];
 254
 255 catch_assembly_dy = -cppy9 + catch_strap_width;
 256
 257
 258 module MainProfile(){
 259   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
 260   difference(){
 261     union(){
 262       translate(main_cnr_pos){
 263         intersection(){
 264           difference(){
 265             circle(r = main_cnr);
 266             circle(r = main_cnr * 0.5);
 267           }
 268           square([10,10]);
 269         }
 270       }
 271       polygon([[ -top_middle_dr,        middle_bot_z      ],
 272                [ -top_middle_dr,        top_z             ],
 273                [ main_cnr_pos[0],       top_z             ],
 274                [ side_thick,            main_cnr_pos[1]   ],
 275                [ side_thick,            -side_height      ],
 276                [ side_taper,            -side_height      ],
 277                [ 0,                     -rivet_posn       ],
 278                [ 0,                     by_oring_z        ],
 279                [ -oring_x_rad,          by_oring_z        ],
 280                ],
 281               convexity=10);
 282     }
 283     translate([ oring_mid_dia/2 - main_dia/2, 0 ])
 284       hull(){
 285       translate([ 0, oring_y_rad ])
 286         scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ])
 287         circle(oring_thick/2);
 288       translate([ 0, oring_y_rad*2 - oring_thick/2 ])
 289         circle(oring_thick/2);
 290     }
 291   }
 292 }
 293
 294 module StrapHoopProfile(){
 295   circle(r = strap_hoop_thick/2);
 296 }
 297
 298 module StrapHoop(){ ////toplevel
 299   bigrad = strap_hoop_inside/2 + strap_hoop_thick/2;
 300   extralen = strap_hoop_thick * 5;
 301
 302   intersection(){
 303     rotate([strap_hoop_elevation, 0,0]){
 304       for (x= [ -1, +1 ] * bigrad) {
 305         translate([x, -extralen, 0])
 306           rotate([-90,0,0])
 307           linear_extrude(height= extralen + strap_hoop_strlen + 0.1,
 308                          convexity=10)
 309           StrapHoopProfile();
 310       }
 311       translate([0, strap_hoop_strlen, 0]){
 312         intersection(){
 313           rotate_extrude(convexity=10)
 314             translate([bigrad, 0,0])
 315             StrapHoopProfile();
 316           translate([0,50,0])
 317             cube([100,100,100], center=true);
 318         }
 319       }
 320     }
 321     translate([0, 50, 0])
 322       cube(100, center=true);
 323   }
 324 }
 325
 326 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
 327   // nom_rad > real_rad
 328   rotate([0,0, atan2(offset, nom_rad) ]){
 329     intersection(){
 330       translate([-offset, -10, 0])
 331         rotate([90,0,0])
 332         linear_extrude(height= nom_rad*2, convexity=50)
 333         children(0);
 334       translate([0,0, -25])
 335         cylinder(h=50, r= real_rad);
 336       translate([0,0, -25])
 337         linear_extrude(height= 50, convexity=50)
 338         polygon([ [ 0,0 ],
 339                   [ -slice_size, -real_rad*2 ],
 340                   [ +slice_size, -real_rad*2 ] ]);
 341     }
 342   }
 343 }
 344
 345 module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){
 346   offs = [ for (i=[ x_min :
 347                     slice_size :
 348                     x_max + slice_size ]) i ];
 349   echo (offs);
 350   for (off=offs)
 351     RotateProjectSlice(off, slice_size, nom_rad, real_rad)
 352     children(0);
 353 }
 354
 355 module BayonetCutout(){
 356   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
 357                 bayo_nom_rad,
 358                 bayo_real_rad)
 359     translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
 360     polygon(bayo_polygon, convexity=10);
 361 }
 362
 363 module ProfilesDemo(){ ////toplevel
 364   translate([-10,0]) MainProfile();
 365   translate([+10, -side_height]) polygon(bayo_polygon, convexity=10);
 366 }
 367
 368 module LimitForHandling(){ ////toplevel
 369   hull() for (r=[0,180])
 370     rotate([0,0,r]) {
 371       for (rs=[-1,+1]) {
 372         for (xd=[0,1]) {
 373           rotate([0,0, rs * handling_angle/2]) {
 374             translate([rs * xd * main_dia/2 * tan(handling_angle/2),
 375                        main_dia/2 + side_thick - main_cnr,
 376                        top_z - main_cnr]) {
 377               mirror([0,0,1])
 378                 cylinder(r= main_cnr, h=50);
 379               sphere(main_cnr);
 380             }
 381           }
 382         }
 383       }
 384     }
 385   hull() rotate_extrude(convexity=10){
 386     translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
 387       circle(r = main_cnr);
 388       mirror([0,1]) square([ main_cnr, 50 ]);
 389     }
 390   }
 391   //cylinder(r= handling_dia/2, h=20);
 392 }
 393
 394 module Cover(){ ////toplevel
 395   render() difference(){
 396     intersection(){
 397       union(){
 398         rotate_extrude(convexity=10)
 399           translate([main_dia/2, 0])
 400           MainProfile();
 401         translate([0,0, middle_bot_z])
 402           cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
 403       }
 404       LimitForHandling();
 405     }
 406     for (r=[0,180]){
 407       rotate([0,0, r])
 408         translate([0,0, -side_height])
 409         BayonetCutout();
 410       rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
 411         translate([0,
 412                    oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
 413                    oring_y_rad * 1.5])
 414         rotate([-oring_rm_angle, 0, 0])
 415         mirror([0,0,1])
 416         cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
 417     }
 418     for (r=[0 : 60 : 179]) {
 419       rotate([0,0, r]) {
 420         height = top_thick_middle - brace_above_below*2;
 421         translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 422         cube(center=true, [ oring_bore - brace_end_shorter,
 423                             brace_hole_width, height ]);
 424       }
 425     }
 426   }
 427   if (enable_head_cups)
 428     for (r=[0,180])
 429       rotate([0,0,r])
 430         translate([-implheadcup_large_dia * .5 - implheadcup_thick/2,
 431                    -implheadcup_large_dia * .0,
 432                    middle_bot_z + 0.1])
 433         ImplHeadCup();
 434
 435 //  translate(strap_hoop_thick * [-0.5, 0, +1])
 436 //    translate([handling_dia/2, 0, -side_height])
 437 //    rotate([0,180,0]) rotate([0,0,90])
 438 //    StrapHoop();
 439 }
 440
 441 module SavingHole(){
 442   translate([0,0, -10])
 443     cylinder(r= main_dia/2 - jig_rim, h=20);
 444 }
 445
 446 module Jig(){ ////toplevel
 447   difference(){
 448     union(){
 449       translate([0,0, -side_height]){
 450         cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
 451       }
 452       translate([-jig_mark_rad, 0, jig_thick - jig_mark])
 453         cube([jig_mark_rad*2, jig_mark, jig_mark]);
 454     }
 455     translate([0,0, -side_height-1])
 456       cylinder(r= main_dia/2, h= side_height + 1);
 457     SavingHole();
 458     translate([0,0, -rivet_posn])
 459       rotate([90, 0,0])
 460       translate([0,0, -100])
 461       cylinder(r= jig_hole_dia/2, h = 200);
 462   }
 463 }
 464
 465 module CoverTest2(){ ////toplevel
 466   difference(){
 467     Cover();
 468     SavingHole();
 469   }
 470 }
 471
 472 module CoverTest1(){ ////toplevel
 473   difference(){
 474     CoverTest2();
 475     difference(){
 476       for (r= [ 40, 147 ]){
 477         rotate([0,0, r]){
 478           translate([0,0, -10]) {
 479             cube([ main_dia*3, main_dia * .53, 18], center=true);
 480           }
 481         }
 482       }
 483 //      translate([ 50, 0, 0 ])
 484 //      cube([ 100,
 485 //             strap_hoop_inside + strap_hoop_thick*2 + 1,
 486 //             100 ],
 487 //           center=true);
 488     }
 489   }
 490 }
 491
 492 module ImplHeadCupTest(){ ////toplevel
 493   for (r=[0,180])
 494     rotate([0,0,r])
 495       translate([-17,0,0])
 496       ImplHeadCup();
 497 }
 498
 499 module SomeStrap(width){
 500   // children(0) is to add, (1) subtract
 501   difference(){
 502     union(){
 503       cylinder(r=sm_outer_rad, h=width);
 504       StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
 505                            smc_max_y,
 506                            sm_closure_cnr,
 507                            width);
 508       children(0);
 509     }
 510     translate([0,0,-1])
 511       cylinder(r=sm_inner_rad, h=width+2);
 512     translate(smc_pos)
 513       StrapMountBolt(10, width);
 514     translate(smc_pos)
 515       cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
 516     children(1);
 517   }
 518 }
 519
 520 module StrapMountBolt(l_delta, strap_width){ ///toplevel
 521   // positioned relative to smc_pos
 522   translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
 523              smc_bolt_y,
 524              strap_width/2]){
 525     translate([ -sm_bolt_shaft/2-1, 0,0 ]){
 526       rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
 527     }
 528     translate([ -sm_bolt_shaft/2, 0,0 ])
 529       rotate([0,-90,0])
 530       cylinder($fn=6, r=smc_bolt_nut_dia/2,
 531                h=smc_bolt_nut_eff_thick + l_delta);
 532     translate([ sm_bolt_shaft/2, 0,0 ])
 533       rotate([0,90,0])
 534       cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
 535   }
 536 }
 537
 538 module StrapMountProtrusion(half_x, max_y, cnr, width){
 539   translate(smc_pos){
 540     linear_extrude(height=width, convexity=10){
 541       hull(){
 542         for (m = [0,1]) mirror([m,0,0]) {
 543           translate([-(half_x - cnr), max_y - cnr])
 544             circle(r=cnr);
 545           translate([-half_x, -sm_inner_rad])
 546             square([1,1]);
 547         }
 548       }
 549     }
 550   }
 551 }
 552
 553 module StrapMount(){ ////toplevel
 554   SomeStrap(sm_main_width){
 555     rotate([0,0,180]){
 556       StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
 557                            strap_hoop_thick,
 558                            sm_closure_cnr);
 559       translate(smc_pos +
 560                 [0,0, sm_main_width] +
 561                 strap_hoop_thick * [ 0, 0.5, -1.0 ])
 562         StrapHoop();
 563     }
 564     union(){ };
 565   }
 566 }
 567
 568 module CatchAssemblyCoreProfile(){
 569   difference(){
 570     union(){
 571       hull(){
 572         translate(cpp3) circle(r= catch_cr3);
 573         polygon([ cpp3,
 574                   cpp2r,
 575                   cpp5,
 576                   cpph,
 577                   cppd
 578                   ]);
 579       }
 580       polygon([cppD,
 581                cppC,
 582                cpp9,
 583                cpp10,
 584                cpp11,
 585                cpp4,
 586                cpp2r,
 587                cpp2d,
 588                cppA,
 589                cppE
 590                ]);
 591       translate(cpp8) circle(r= catch_cr);
 592     }
 593     hull(){
 594       translate(cpp4) circle(r= catch_cr);
 595       translate(cpp5) circle(r= catch_cr);
 596       translate(cpp7) circle(r= catch_cr);
 597       polygon([cpp4,
 598                cppg,
 599                cpph,
 600                cpp10,
 601                cpp11,
 602                ]);
 603     }
 604     translate(cpp2) circle(r= catch_cr);
 605   }
 606   // if cpp11 is above cpp10, the subtracted hull above
 607   // can go down too far.  Ensure we do not cut off below cppy6.
 608   polygon([ cppE,
 609             cppD,
 610             cpp9,
 611             [ cpp9[0],            cppy6 ],
 612             [ cpp7[0] - catch_cr, cppy6 ],
 613             cpp2d
 614             ]);
 615 }
 616
 617 module CatchTipProfile(dy){
 618   ddy = [0,dy];
 619   intersection(){
 620     translate(cppF){
 621       difference(){
 622 //      circle(r = dist2d(cppF, cppd));
 623         //circle(r = dist2d(cppF, cppa));
 624       }
 625     }
 626     polygon([ cppa,
 627               cppi + ddy,
 628               cppd + ddy,
 629               cppc,
 630               cppb ]);
 631   }
 632 }
 633
 634 module CatchHeadProfile(){
 635   polygon([ cppd,
 636             cppd,
 637             cppi,
 638             cppf,
 639             cppe,
 640             cpph ]);
 641 }
 642
 643
 644 module CatchCore(){ /////toplevel
 645   linear_extrude(height=catch_strap_thick, convexity=10)
 646     CatchAssemblyCoreProfile();
 647
 648   hull(){
 649     linear_extrude(height=catch_head_th, convexity=10)
 650       CatchTipProfile(0);
 651     linear_extrude(height=catch_tip_th, convexity=10)
 652       CatchTipProfile(catch_tip_th - catch_head_th);
 653   }
 654
 655   linear_extrude(height=catch_head_th, convexity=10)
 656     CatchHeadProfile();
 657
 658   translate(concat(cppB,[0])) hull(){
 659     translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2])
 660       sphere(r = catch_knob_dia/2);
 661     cylinder(r = catch_knob_dia/2, h = 0.1);
 662   }
 663 }
 664
 665 module CatchPreDistort(){ /////toplevel
 666   scale(100 / sm_inner_rad)
 667     rotate([90,0,0])
 668     CatchCore();
 669 }
 670
 671 module CatchAssembly(){ /////toplevel
 672   rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
 673     translate([0,0, catch_assembly_dy])
 674     scale(sm_inner_rad / 100)
 675     import(str("poster-tube-lid,CatchPostDistort-fa",
 676                (coarse ? 20 : 3),
 677                ".stl"),
 678            convexity=20);
 679
 680   SomeStrap(catch_strap_width){
 681     union(){ }
 682     union(){
 683       translate([-200, -200, -200])
 684         cube([400, 200, 400]);
 685     }
 686   }
 687 }
 688
 689 module CatchDemo(){ /////toplevel
 690   color("blue") translate([0,0,
 691                            -catch_assembly_dy
 692              ])
 693     CatchAssembly();
 694   translate([0,0,+side_height
 695              ])
 696     Cover();
 697 }
 698
 699 module CatchDemoS(){ /////toplevel
 700   color("blue") translate([0,0,
 701              -catch_assembly_dy
 702              ])
 703     CatchAssembly();
 704   intersection(){
 705     translate([0,0,+side_height
 706                ])
 707       Cover();
 708     mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
 709   }
 710   color("black")
 711     translate([0,-33,0])
 712     cube([6.15, 2,2], center=true);
 713 }
 714
 715 module CatchPinProfileDemo(){ /////toplevel
 716   translate([0, 0 * -bayo_behind,0]) {
 717     echo("G ",
 718          bayo_n[0] - bayo_e[0]);
 719     color("blue") translate([0,0,
 720                              +1,
 721                ]) {
 722       CatchAssemblyCoreProfile();
 723       CatchHeadProfile();
 724     }
 725     translate([0,0,10])
 726       color("red")
 727       CatchTipProfile(0);
 728
 729     polygon(bayo_polygon, convexity=10);
 730
 731     // adhoc show a position
 732     color("purple")
 733     translate(concat(
 734                      cppa,
 735                      10
 736                      )) difference(){ circle(2.5); circle(2.0); }
 737
 738  }
 739 }
 740
 741 //ProfilesDemo();
 742 //BayonetCutout();
 743 //MainProfile();
 744 //Cover();
 745 //Jig();
 746 //CoverTest();