poster-tube-lid.scad

   1 // -*- C -*-
   2
   3 // Print, for each end:
   4 //
   5 //   CoverPrint
   6 //   StrapMount
   7 //   CatchAssembly
   8
   9 include <funcs.scad>
  10
  11 coarse = false;
  12 enable_head_cups = false;
  13
  14 main_dia = 71.2 + 0.50 - 2.26;
  15 top_thick_middle = 4;
  16 top_thick_by_oring = 3.0;
  17 top_middle_dr = 11;
  18
  19 main_cnr = 6.0;
  20
  21 min_wall = 3;
  22
  23 rivet_posn = 6.0 + 0.30;
  24 rivet_thick = 1.67;
  25 rivet_width = 4.15 + 1.0;
  26 rivet_tall = 5.51 + 1.49;
  27
  28 over_rivet_wall = 1.0;
  29 side_rivet_gap = 1.5;
  30 inside_rivet_gap = 1.5;
  31
  32 bayo_interf = 0.30;
  33 bayo_behind = 8.5;
  34 bayo_interf_width = 2.0;
  35 bayo_interf_slope = 0.5;
  36
  37 oring_thick = 5.0;
  38 oring_bore = 62.0;
  39
  40 oring_upper_embed_angle = 80;
  41 oring_compress = 0.1; // proportion
  42 oring_compress_more = 0.2;
  43
  44 oring_rm_beside = 8;
  45 oring_rm_scale = 2.0;
  46 oring_rm_angle = 20;
  47
  48 side_taper = 1.0;
  49
  50 bayo_gap = 6.0;
  51
  52 bayo_entry = 1.167;
  53 bayo_inramp = 0.9;
  54
  55 bayo_slice_size = coarse ? 5 : 1;
  56
  57 brace_hole_width = 1.0;
  58 brace_above_below = 1.2;
  59 brace_end_shorter = 0.3;
  60
  61 jig_thick = 1.4;
  62 jig_hole_dia = 3.0;
  63 jig_rim = 5;
  64 jig_mark = 5;
  65
  66 strap_hoop_thick = 6;
  67 strap_hoop_inside = 10;
  68 strap_hoop_strlen = 10;
  69 strap_hoop_elevation = 45;
  70
  71 sm_inner_circum = 218 - 1.90 - 1.00 - 0.50;
  72 sm_main_thick = 2.0;
  73 sm_main_width = 20;
  74
  75 sm_bolt_dia = 3.5 + 0.1;
  76 sm_bolt_shaft = 21.0;
  77 sm_bolt_head_dia = 6.94 + 1.0;
  78 sm_bolt_head_thick = 2.14;
  79 sm_bolt_nut_width = 5.89 + 0.25;
  80 sm_bolt_nut_thick = 3.68;
  81 sm_bolt_tighten_allow = 2.0;
  82
  83 sm_bolt_y_clear = 0.75;
  84 sm_bolt_y_over = 0.5;
  85
  86 sm_closure_cnr = 3.0;
  87
  88 catch_stalk_h = 4.5;
  89 catch_stalk_len = 50;
  90 catch_tip_th = 4;
  91 catch_head_th = 3;
  92
  93 catch_pin_slop = 0.25; // each side, and above
  94 catch_pin_slop_x_extra = 0.0; // only on one side
  95 catch_stalk_above_gap = 1.5;
  96 catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
  97
  98 catch_strap_width = 12;
  99 catch_stalk_base_width = 15;
 100
 101 catch_knob_dia = 6;
 102 catch_knob_above_gap = 5;
 103 catch_knob_height = 3.0;
 104
 105 catch_stalk_below_gap = 1.0;
 106 catch_stalk_beside_gap = 2.0;
 107
 108 // calculated
 109
 110 TAU = PI*2;
 111
 112 bayo_entry_x = bayo_entry;
 113 bayo_entry_z = bayo_entry;
 114 bayo_inramp_x = bayo_inramp;
 115 bayo_inramp_z = bayo_inramp;
 116
 117 oring_mid_dia = oring_bore + oring_thick;
 118 oring_outer_dia = oring_mid_dia + oring_thick;
 119
 120 oring_oblate = (1 - oring_compress);
 121
 122 oring_y_rad = oring_thick/2 * oring_oblate;
 123 oring_x_rad = oring_thick/2 / oring_oblate;
 124
 125 by_oring_z = oring_y_rad * (1 + cos(oring_upper_embed_angle));
 126
 127 side_height = rivet_posn + bayo_behind + rivet_thick/2;
 128 side_thick = rivet_tall + over_rivet_wall;
 129
 130 top_z = top_thick_by_oring + oring_y_rad + by_oring_z;
 131
 132 middle_bot_z = top_z - top_thick_middle;
 133
 134 bayo_top_z = bayo_behind + bayo_gap;
 135
 136 bayo_nom_rad = main_dia/2 + side_thick;
 137 bayo_real_rad = main_dia/2 + rivet_tall;
 138
 139 rivet_entry_width = rivet_width + side_rivet_gap;
 140
 141 jig_mark_rad = jig_mark + main_dia/2 + jig_thick;
 142
 143 handling_dia = oring_bore + oring_thick*2 + min_wall*2;
 144 handling_angle = 45;
 145
 146 sm_inner_rad = (sm_inner_circum + sm_bolt_tighten_allow/2) / TAU;
 147 sm_outer_rad = sm_inner_rad + sm_main_thick;
 148
 149 smc_pos = [ 0, sm_inner_rad, 0 ];
 150
 151 smc_bolt_nut_dia = sm_bolt_nut_width / cos(30);
 152 smc_bolt_nut_eff_thick = sm_bolt_nut_thick + sm_bolt_tighten_allow;
 153
 154 smc_bolt_y = sm_bolt_dia/2 + sm_bolt_y_clear;
 155 smc_max_y = smc_bolt_y + sm_bolt_y_over
 156   + max(sm_bolt_head_dia/2, smc_bolt_nut_dia/2);
 157 smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
 158   + sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
 159
 160 catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
 161 catch_strap_thick = sm_main_thick;
 162
 163 echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
 164
 165 $fs= coarse ? 2.5 : 0.5;
 166 $fa= coarse ? 5 : 1;
 167
 168 include <poster-tube-lid-parametric.scad>
 169
 170 // bayonet definition
 171
 172 bayo_a = [ bayo_entry_x, 0 ];
 173 bayo_p = [ 0, bayo_entry_z ];
 174 bayo_n = [ 0, bayo_behind-bayo_inramp_z ];
 175 bayo_m = [ bayo_inramp_x, bayo_behind ];
 176 bayo_l = bayo_m + bayo_interf * [ 1/bayo_interf_slope,  1 ];
 177 bayo_k = bayo_l + [ bayo_interf_width, 0 ];
 178 bayo_j = bayo_k + bayo_interf * [ 1/bayo_interf_slope, -1 ];
 179 bayo_i = bayo_j + [ rivet_width + inside_rivet_gap, 0 ];
 180 bayo_h = [ bayo_i[0], bayo_behind + bayo_gap + bayo_interf ];
 181 bayo_g = [ bayo_m[0] - rivet_width, bayo_h[1] ];
 182
 183 bayo_e = [-bayo_p[0], bayo_p[1]] - [rivet_entry_width,0];
 184 bayo_d = [-bayo_a[0], bayo_a[1]] - [rivet_entry_width,0];
 185 bayo_c = bayo_d + [0,-5];
 186 bayo_b = bayo_a + [0,-5];
 187
 188 bayo_f = [ bayo_e[0], bayo_g[1] + (bayo_e[0] - bayo_g[0]) ];
 189
 190 bayo_polygon = [ bayo_a,
 191                  bayo_b,
 192                  bayo_c,
 193                  bayo_d,
 194                  bayo_e,
 195                  bayo_f,
 196                  bayo_g,
 197                  bayo_h,
 198                  bayo_i,
 199                  bayo_j,
 200                  bayo_k,
 201                  bayo_l,
 202                  bayo_m,
 203                  bayo_n,
 204                  bayo_p ];
 205
 206 echo(bayo_polygon);
 207
 208 // CATCH
 209
 210 cppxC = 0.41 * sm_inner_rad * TAU;
 211
 212 // catch pin
 213
 214 cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
 215 // radius scaling due to nom and actual radius difference in
 216 // bayo entry construction
 217
 218 cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 219 cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
 220 cppd = [ bayo_n[0]
 221          - catch_pin_slop - catch_pin_slop_x_extra,
 222          -catch_stalk_above_gap ];
 223 cppi = [ cppa[0], cppd[1] ];
 224 cppc = [ cppd[0], cppb[1] ];
 225 cpph = cppd + [0,-1] * catch_stalk_h;
 226 cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
 227 cppf = [ cppa[0], cppe[1] ];
 228 cppg = [ cppa[0], cpph[1] ];
 229 cppB = 0.5 * (cppf + cppe);
 230
 231 echo("RR", sm_inner_rad / bayo_nom_rad);
 232
 233 // catch assembly depression below pin
 234
 235 cppy6 = cppB[1] - (catch_knob_dia/2
 236                    + (cppc[1] - cppd[1])
 237                    + catch_stalk_below_gap);
 238 cpp7 = [ cppB[0], cppy6 + catch_cr ];
 239 cpp11 = cpp7 + [1,0] * catch_cr;
 240 cppy9 = cppy6 + catch_strap_width * 1/3;
 241 cpp9 = [ cpp7[0] + catch_cr * 2, cppy9 ];
 242 cpp8 = cpp9 + [0,-1] * catch_cr;
 243 cpp10 = cpp8 + [-1,0] * catch_cr;
 244 cppC = [ cppxC, cpp9[1] ];
 245 cppD = cppC + [0,-1] * catch_strap_width;
 246
 247 // catch assembly stalk and so on
 248
 249 catch_cr3 = catch_cr + catch_stalk_h;
 250
 251 cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
 252 cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
 253 cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
 254 cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
 255 cpp2r = cpp2 + [1,0] * catch_cr;
 256 cpp2d = cpp2 + [0,-1] * catch_cr;
 257 cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
 258 cppA = [ -cppxC, cpp9[1] ];
 259 cppE = [ cppA[0], cppD[1] ];
 260
 261 catch_assembly_dy = -cppy9 + catch_strap_width;
 262
 263
 264 module MainProfile(){
 265   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
 266   difference(){
 267     union(){
 268       translate(main_cnr_pos){
 269         intersection(){
 270           difference(){
 271             circle(r = main_cnr);
 272             circle(r = main_cnr * 0.5);
 273           }
 274           square([10,10]);
 275         }
 276       }
 277       polygon([[ -top_middle_dr,        middle_bot_z      ],
 278                [ -top_middle_dr,        top_z             ],
 279                [ main_cnr_pos[0],       top_z             ],
 280                [ side_thick,            main_cnr_pos[1]   ],
 281                [ side_thick,            -side_height      ],
 282                [ side_taper,            -side_height      ],
 283                [ 0,                     -rivet_posn       ],
 284                [ 0,                     by_oring_z        ],
 285                [ -oring_x_rad,          by_oring_z        ],
 286                ],
 287               convexity=10);
 288     }
 289     translate([ oring_mid_dia/2 - main_dia/2, 0 ])
 290       hull(){
 291       translate([ 0, oring_y_rad ])
 292         scale([ 1/oring_oblate * (oring_compress_more+1) , oring_oblate ])
 293         circle(oring_thick/2);
 294       translate([ 0, oring_y_rad*2 - oring_thick/2 ])
 295         circle(oring_thick/2);
 296     }
 297   }
 298 }
 299
 300 module StrapHoopProfile(){
 301   circle(r = strap_hoop_thick/2);
 302 }
 303
 304 module StrapHoop(){ ////toplevel
 305   bigrad = strap_hoop_inside/2 + strap_hoop_thick/2;
 306   extralen = strap_hoop_thick * 5;
 307
 308   intersection(){
 309     rotate([strap_hoop_elevation, 0,0]){
 310       for (x= [ -1, +1 ] * bigrad) {
 311         translate([x, -extralen, 0])
 312           rotate([-90,0,0])
 313           linear_extrude(height= extralen + strap_hoop_strlen + 0.1,
 314                          convexity=10)
 315           StrapHoopProfile();
 316       }
 317       translate([0, strap_hoop_strlen, 0]){
 318         intersection(){
 319           rotate_extrude(convexity=10)
 320             translate([bigrad, 0,0])
 321             StrapHoopProfile();
 322           translate([0,50,0])
 323             cube([100,100,100], center=true);
 324         }
 325       }
 326     }
 327     translate([0, 50, 0])
 328       cube(100, center=true);
 329   }
 330 }
 331
 332 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){
 333   // nom_rad > real_rad
 334   rotate([0,0, atan2(offset, nom_rad) ]){
 335     intersection(){
 336       translate([-offset, -10, 0])
 337         rotate([90,0,0])
 338         linear_extrude(height= nom_rad*2, convexity=50)
 339         children(0);
 340       translate([0,0, -25])
 341         cylinder(h=50, r= real_rad);
 342       translate([0,0, -25])
 343         linear_extrude(height= 50, convexity=50)
 344         polygon([ [ 0,0 ],
 345                   [ -slice_size, -real_rad*2 ],
 346                   [ +slice_size, -real_rad*2 ] ]);
 347     }
 348   }
 349 }
 350
 351 module RotateProject(x_min, x_max, slice_size, nom_rad, real_rad){
 352   offs = [ for (i=[ x_min :
 353                     slice_size :
 354                     x_max + slice_size ]) i ];
 355   echo (offs);
 356   for (off=offs)
 357     RotateProjectSlice(off, slice_size, nom_rad, real_rad)
 358     children(0);
 359 }
 360
 361 module BayonetCutout(){
 362   RotateProject(bayo_c[0], bayo_i[0], bayo_slice_size,
 363                 bayo_nom_rad,
 364                 bayo_real_rad)
 365     translate([-0.5 * (bayo_a[0] + bayo_d[0]), 0])
 366     polygon(bayo_polygon, convexity=10);
 367 }
 368
 369 module ProfilesDemo(){ ////toplevel
 370   translate([-10,0]) MainProfile();
 371   translate([+10, -side_height]) polygon(bayo_polygon, convexity=10);
 372 }
 373
 374 module LimitForHandling(){ ////toplevel
 375   hull() for (r=[0,180])
 376     rotate([0,0,r]) {
 377       for (rs=[-1,+1]) {
 378         for (xd=[0,1]) {
 379           rotate([0,0, rs * handling_angle/2]) {
 380             translate([rs * xd * main_dia/2 * tan(handling_angle/2),
 381                        main_dia/2 + side_thick - main_cnr,
 382                        top_z - main_cnr]) {
 383               mirror([0,0,1])
 384                 cylinder(r= main_cnr, h=50);
 385               sphere(main_cnr);
 386             }
 387           }
 388         }
 389       }
 390     }
 391   hull() rotate_extrude(convexity=10){
 392     translate([ handling_dia/2 - main_cnr, top_z - main_cnr ]) {
 393       circle(r = main_cnr);
 394       mirror([0,1]) square([ main_cnr, 50 ]);
 395     }
 396   }
 397   //cylinder(r= handling_dia/2, h=20);
 398 }
 399
 400 module Cover(){ ////toplevel
 401   render() difference(){
 402     intersection(){
 403       union(){
 404         rotate_extrude(convexity=10)
 405           translate([main_dia/2, 0])
 406           MainProfile();
 407         translate([0,0, middle_bot_z])
 408           cylinder(h= top_thick_middle, r = main_dia/2 - top_middle_dr + 1);
 409       }
 410       LimitForHandling();
 411     }
 412     for (r=[0,180]){
 413       rotate([0,0, r])
 414         translate([0,0, -side_height])
 415         BayonetCutout();
 416       rotate([0,0, r + asin((-oring_rm_beside) / (main_dia/2))])
 417         translate([0,
 418                    oring_mid_dia/2 + oring_thick/4 * oring_rm_scale,
 419                    oring_y_rad * 1.5])
 420         rotate([-oring_rm_angle, 0, 0])
 421         mirror([0,0,1])
 422         cylinder(r = oring_thick/4 * oring_rm_scale, h=20);
 423     }
 424     for (r=[0 : 60 : 179]) {
 425       rotate([0,0, r]) {
 426         height = top_thick_middle - brace_above_below*2;
 427         translate([0,0, middle_bot_z + brace_above_below + height/2 ])
 428         cube(center=true, [ oring_bore - brace_end_shorter,
 429                             brace_hole_width, height ]);
 430       }
 431     }
 432   }
 433   if (enable_head_cups)
 434     for (r=[0,180])
 435       rotate([0,0,r])
 436         translate([-implheadcup_large_dia * .5 - implheadcup_thick/2,
 437                    -implheadcup_large_dia * .0,
 438                    middle_bot_z + 0.1])
 439         ImplHeadCup();
 440
 441 //  translate(strap_hoop_thick * [-0.5, 0, +1])
 442 //    translate([handling_dia/2, 0, -side_height])
 443 //    rotate([0,180,0]) rotate([0,0,90])
 444 //    StrapHoop();
 445 }
 446
 447 module SavingHole(){
 448   translate([0,0, -10])
 449     cylinder(r= main_dia/2 - jig_rim, h=20);
 450 }
 451
 452 module Jig(){ ////toplevel
 453   difference(){
 454     union(){
 455       translate([0,0, -side_height]){
 456         cylinder(r= main_dia/2 + jig_thick, h= side_height + jig_thick);
 457       }
 458       translate([-jig_mark_rad, 0, jig_thick - jig_mark])
 459         cube([jig_mark_rad*2, jig_mark, jig_mark]);
 460     }
 461     translate([0,0, -side_height-1])
 462       cylinder(r= main_dia/2, h= side_height + 1);
 463     SavingHole();
 464     translate([0,0, -rivet_posn])
 465       rotate([90, 0,0])
 466       translate([0,0, -100])
 467       cylinder(r= jig_hole_dia/2, h = 200);
 468   }
 469 }
 470
 471 module CoverPrint(){ ////toplevel
 472   rotate([0,180,0]) Cover();
 473 }
 474
 475 module CoverTest2(){ ////toplevel
 476   difference(){
 477     Cover();
 478     SavingHole();
 479   }
 480 }
 481
 482 module CoverTest1(){ ////toplevel
 483   difference(){
 484     CoverTest2();
 485     difference(){
 486       for (r= [ 40, 147 ]){
 487         rotate([0,0, r]){
 488           translate([0,0, -10]) {
 489             cube([ main_dia*3, main_dia * .53, 18], center=true);
 490           }
 491         }
 492       }
 493 //      translate([ 50, 0, 0 ])
 494 //      cube([ 100,
 495 //             strap_hoop_inside + strap_hoop_thick*2 + 1,
 496 //             100 ],
 497 //           center=true);
 498     }
 499   }
 500 }
 501
 502 module ImplHeadCupTest(){ ////toplevel
 503   for (r=[0,180])
 504     rotate([0,0,r])
 505       translate([-17,0,0])
 506       ImplHeadCup();
 507 }
 508
 509 module SomeStrap(width){
 510   // children(0) is to add, (1) subtract
 511   difference(){
 512     union(){
 513       cylinder(r=sm_outer_rad, h=width);
 514       StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
 515                            smc_max_y,
 516                            sm_closure_cnr,
 517                            width);
 518       children(0);
 519     }
 520     translate([0,0,-1])
 521       cylinder(r=sm_inner_rad, h=width+2);
 522     translate(smc_pos)
 523       StrapMountBolt(10, width);
 524     translate(smc_pos)
 525       cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
 526     children(1);
 527   }
 528 }
 529
 530 module StrapMountBolt(l_delta, strap_width){ ///toplevel
 531   // positioned relative to smc_pos
 532   translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
 533              smc_bolt_y,
 534              strap_width/2]){
 535     translate([ -sm_bolt_shaft/2-1, 0,0 ]){
 536       rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
 537     }
 538     translate([ -sm_bolt_shaft/2, 0,0 ])
 539       rotate([0,-90,0])
 540       cylinder($fn=6, r=smc_bolt_nut_dia/2,
 541                h=smc_bolt_nut_eff_thick + l_delta);
 542     translate([ sm_bolt_shaft/2, 0,0 ])
 543       rotate([0,90,0])
 544       cylinder(r=sm_bolt_head_dia/2, h=sm_bolt_head_thick + l_delta);
 545   }
 546 }
 547
 548 module StrapMountProtrusion(half_x, max_y, cnr, width){
 549   translate(smc_pos){
 550     linear_extrude(height=width, convexity=10){
 551       hull(){
 552         for (m = [0,1]) mirror([m,0,0]) {
 553           translate([-(half_x - cnr), max_y - cnr])
 554             circle(r=cnr);
 555           translate([-half_x, -sm_inner_rad])
 556             square([1,1]);
 557         }
 558       }
 559     }
 560   }
 561 }
 562
 563 module StrapMount(){ ////toplevel
 564   SomeStrap(sm_main_width){
 565     rotate([0,0,180]){
 566       StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
 567                            strap_hoop_thick,
 568                            sm_closure_cnr,
 569                            sm_main_width);
 570       translate(smc_pos +
 571                 [0,0, sm_main_width] +
 572                 strap_hoop_thick * [ 0, 0.5, -1.0 ])
 573         StrapHoop();
 574     }
 575     union(){ };
 576   }
 577 }
 578
 579 module CatchAssemblyCoreProfile(){
 580   difference(){
 581     union(){
 582       hull(){
 583         translate(cpp3) circle(r= catch_cr3);
 584         polygon([ cpp3,
 585                   cpp2r,
 586                   cpp5,
 587                   cpph,
 588                   cppd
 589                   ]);
 590       }
 591       polygon([cppD,
 592                cppC,
 593                cpp9,
 594                cpp10,
 595                cpp11,
 596                cpp4,
 597                cpp2r,
 598                cpp2d,
 599                cppA,
 600                cppE
 601                ]);
 602       translate(cpp8) circle(r= catch_cr);
 603     }
 604     hull(){
 605       translate(cpp4) circle(r= catch_cr);
 606       translate(cpp5) circle(r= catch_cr);
 607       translate(cpp7) circle(r= catch_cr);
 608       polygon([cpp4,
 609                cppg,
 610                cpph,
 611                cpp10,
 612                cpp11,
 613                ]);
 614     }
 615     translate(cpp2) circle(r= catch_cr);
 616   }
 617   // if cpp11 is above cpp10, the subtracted hull above
 618   // can go down too far.  Ensure we do not cut off below cppy6.
 619   polygon([ cppE,
 620             cppD,
 621             cpp9,
 622             [ cpp9[0],            cppy6 ],
 623             [ cpp7[0] - catch_cr, cppy6 ],
 624             cpp2d
 625             ]);
 626 }
 627
 628 module CatchTipProfile(dy){
 629   ddy = [0,dy];
 630   intersection(){
 631     translate(cppF){
 632       difference(){
 633 //      circle(r = dist2d(cppF, cppd));
 634         //circle(r = dist2d(cppF, cppa));
 635       }
 636     }
 637     polygon([ cppa,
 638               cppi + ddy,
 639               cppd + ddy,
 640               cppc,
 641               cppb ]);
 642   }
 643 }
 644
 645 module CatchHeadProfile(){
 646   polygon([ cppd,
 647             cppd,
 648             cppi,
 649             cppf,
 650             cppe,
 651             cpph ]);
 652 }
 653
 654
 655 module CatchCore(){ /////toplevel
 656   linear_extrude(height=catch_strap_thick, convexity=10)
 657     CatchAssemblyCoreProfile();
 658
 659   hull(){
 660     linear_extrude(height=catch_head_th, convexity=10)
 661       CatchTipProfile(0);
 662     linear_extrude(height=catch_tip_th, convexity=10)
 663       CatchTipProfile(catch_tip_th - catch_head_th);
 664   }
 665
 666   linear_extrude(height=catch_head_th, convexity=10)
 667     CatchHeadProfile();
 668
 669   translate(concat(cppB,[0])) hull(){
 670     translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2])
 671       sphere(r = catch_knob_dia/2);
 672     cylinder(r = catch_knob_dia/2, h = 0.1);
 673   }
 674 }
 675
 676 module CatchPreDistort(){ /////toplevel
 677   scale(100 / sm_inner_rad)
 678     rotate([90,0,0])
 679     CatchCore();
 680 }
 681
 682 module CatchAssembly(){ /////toplevel
 683   rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
 684     translate([0,0, catch_assembly_dy])
 685     scale(sm_inner_rad / 100)
 686     import(str("poster-tube-lid,CatchPostDistort-fa",
 687                (coarse ? 20 : 3),
 688                ".stl"),
 689            convexity=20);
 690
 691   SomeStrap(catch_strap_width){
 692     union(){ }
 693     union(){
 694       translate([-200, -200, -200])
 695         cube([400, 200, 400]);
 696     }
 697   }
 698 }
 699
 700 module CatchDemo(){ /////toplevel
 701   color("blue") translate([0,0,
 702                            -catch_assembly_dy
 703              ])
 704     CatchAssembly();
 705   translate([0,0,+side_height
 706              ])
 707     Cover();
 708 }
 709
 710 module CatchDemoS(){ /////toplevel
 711   color("blue") translate([0,0,
 712              -catch_assembly_dy
 713              ])
 714     CatchAssembly();
 715   intersection(){
 716     translate([0,0,+side_height
 717                ])
 718       Cover();
 719     mirror([0,1,0]) translate([-250,33,0]) cube([500,500,500]);
 720   }
 721   color("black")
 722     translate([0,-33,0])
 723     cube([6.15, 2,2], center=true);
 724 }
 725
 726 module CatchPinProfileDemo(){ /////toplevel
 727   translate([0, 0 * -bayo_behind,0]) {
 728     echo("G ",
 729          bayo_n[0] - bayo_e[0]);
 730     color("blue") translate([0,0,
 731                              +1,
 732                ]) {
 733       CatchAssemblyCoreProfile();
 734       CatchHeadProfile();
 735     }
 736     translate([0,0,10])
 737       color("red")
 738       CatchTipProfile(0);
 739
 740     polygon(bayo_polygon, convexity=10);
 741
 742     // adhoc show a position
 743     color("purple")
 744     translate(concat(
 745                      cppa,
 746                      10
 747                      )) difference(){ circle(2.5); circle(2.0); }
 748
 749  }
 750 }
 751
 752 //ProfilesDemo();
 753 //BayonetCutout();
 754 //MainProfile();
 755 //Cover();
 756 //Jig();
 757 //CoverTest();