box_frame/doc/complete-printer-plus.scad

   1 // PRUSA iteration3
   2 // Complete printer visualisation
   3 // GNU GPL v3
   4 // Greg Frost
   5 // http://www.reprap.org/wiki/Prusa_Mendel
   6 // http://github.com/prusajr/PrusaMendel
   7
   8 include <../configuration.scad>
   9 use <../y-drivetrain.scad>
  10 use <../y-axis-corner.scad>
  11 use <../z-axis.scad>
  12 use <../x-end.scad>
  13 use <../x-carriage.scad>
  14 use <../y-axis-bracket.scad>
  15 use <../bushing.scad>
  16 use <../inc/bearing-guide.scad>
  17 module ybeltholder() {
  18         include <../y-belt-holder.scad>
  19 }
  20 module bearing_guide() {
  21         bearing_guide_inner();
  22         translate([0,0,7+0.9*2])rotate([0,180,0])bearing_guide_outer();
  23 }
  24
  25
  26 //--------------------------------------------------------------------------------------------------------------------------------
  27 // screws, nuts, etc
  28 //--------------------------------------------------------------------------------------------------------------------------------
  29 // wood (flat) screw
  30 module screw(depth=board_thickness*1.5){
  31         module arrow(radiusmax=4, thickness=1, initialgap=0.5, radiusmin=0.5, depth=4) {
  32                 union() {
  33                         hull() {
  34                                 translate([0,0,initialgap/2-0.25])cube(size=[radiusmax,thickness,initialgap+0.5], center=true);
  35                                 translate([0,0,depth])cube(size=[radiusmin,radiusmin,radiusmin], center=true);
  36                         }
  37                         rotate([0,0,90]) hull() {
  38                                 translate([0,0,initialgap/2-0.25])cube(size=[radiusmax,thickness,initialgap+0.5], center=true);
  39                                 translate([0,0,depth])cube(size=[radiusmin,radiusmin,radiusmin], center=true);
  40                         }
  41                 }
  42         }
  43
  44         color([1,1,0])
  45         difference() {
  46                 union() {
  47                         cylinder(r1=4,r2=3.5/2,h=4);
  48                         cylinder(r1=3.5/2,r2=3.5/2,h=depth-2);
  49                         translate([0,0,depth-2])cylinder(r1=3.5/2,r2=0,h=2);
  50                 }
  51                 arrow();
  52         }
  53 }
  54 module M3screw(depth=10) {
  55         difference() {
  56                 union() {
  57                         cylinder(r=1.5, h=2+depth);
  58                         cylinder(r=2.5, h=2);
  59                 }
  60                 cube(size=[6,1,2],center=true);
  61         }
  62 }
  63 // M3 nut
  64 module M3nut(){
  65         color("silver")
  66         difference(){
  67                 translate([0,0,2])cylinder(r=6/2,h=2.5,$fn=6);
  68                 translate([0,0,-1])cylinder(r=3/2,h=12,$fn=10);
  69         }
  70 }
  71 // M8 nut + washer
  72 module nutwasher(){
  73         color("silver")
  74         difference(){
  75                 union(){
  76                         translate([0,0,2])cylinder(r=15/2,h=7,$fn=6);
  77                         translate([0,0,0.5])cylinder(r=8.5,h=1);
  78                 }
  79                 translate([0,0,-1])cylinder(r=8/2,h=12);
  80         }
  81 }
  82 //--------------------------------------------------------------------------------------------------------------------------------
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92 //--------------------------------------------------------------------------------------------------------------------------------
  93 // Y axis
  94 //--------------------------------------------------------------------------------------------------------------------------------
  95 // y motor mount
  96 translate([56-yrodseparation/2,-y_smooth_rod_length/2+9,board_thickness-12])
  97 {
  98         rotate([0,90,0]) rotate([0,0,90]) motorholder();
  99         translate([10,0,30])rotate([0,90,0])nutwasher();
 100         translate([0,0,30])rotate([0,90,180])nutwasher();
 101         translate([10,0,10])rotate([0,90,0])nutwasher();
 102         translate([0,0,10])rotate([0,90,180])nutwasher();
 103 }
 104
 105 // y idler mount
 106 translate([70-yrodseparation/2,y_smooth_rod_length/2-9,30 + board_thickness-12])
 107 {
 108         translate([0,0-33,-8])
 109                 rotate([0,-90,0]) idlermount();
 110         translate([0,0,0])rotate([0,90,0])nutwasher();
 111         translate([-20,0,0])rotate([0,90,180])nutwasher();
 112         // bearing guide
 113         translate([-5,-33+8,-8+8])
 114                 rotate([0,-90,0]) bearing_guide();
 115 }
 116
 117 yrodseparation=140;
 118
 119 module yfront()
 120 {
 121         // corners
 122         render(convexity=2) leftfront();
 123         translate([yrodseparation,0,0]) mirror([1,0,0]) render(convexity=2) leftfront();
 124
 125         // front bottom threaded rod
 126         color("Aqua")
 127         translate([-20,9,10]) rotate([0,90,0]) cylinder(h = yrodseparation+40, r=4);
 128
 129         translate([yrodseparation+11,9,10])rotate([0,90,0])nutwasher();
 130         translate([yrodseparation-11,9,10])rotate([0,90,180])nutwasher();
 131
 132         translate([-11,9,10])rotate([0,90,180])nutwasher();
 133         translate([11,9,10])rotate([0,90,0])nutwasher();
 134
 135         // front top threaded rod
 136         color("Aqua")
 137         translate([-20,9,30]) rotate([0,90,0]) cylinder(h = yrodseparation+40, r=4);
 138
 139         translate([-11,9,30])rotate([0,90,180])nutwasher();
 140         translate([11,9,30])rotate([0,90,0])nutwasher();
 141
 142         translate([yrodseparation-11,9,30])rotate([0,90,180])nutwasher();
 143         translate([yrodseparation+11,9,30])rotate([0,90,0])nutwasher();
 144 }
 145
 146 translate([-yrodseparation/2,-y_smooth_rod_length/2,board_thickness-12])
 147 {
 148         yfront();
 149         translate([0,y_smooth_rod_length,0])
 150                 mirror([0,1,0])
 151                 yfront();
 152 }
 153
 154 module yside()
 155 {
 156         translate([-yrodseparation/2,0])
 157         {
 158         // left top rod
 159         color("MediumBlue")
 160         translate([0,0,3+board_thickness + 30]) rotate([0,90,90]) cylinder(h = y_smooth_rod_length, r=bushing_xy[0],center=true);
 161         //left bottom rod
 162         color("Aqua")
 163         translate([0,0,3+board_thickness+4+1]) rotate([0,90,90]) cylinder(h =  y_smooth_rod_length+22, r=y_threaded_rod_long_r ,center=true);
 164
 165
 166         // middle nuts
 167         // 100=default wood plank width (see pl function below)
 168         translate([0,board_thickness-4-3,8+board_thickness])rotate([0,-90,90])nutwasher();
 169         translate([0,board_thickness+100-4+3,8+board_thickness])rotate([0,90,90])nutwasher();
 170
 171
 172
 173         // back nuts
 174         translate([0,y_smooth_rod_length/2+2,8+board_thickness])rotate([0,90,90])nutwasher();
 175         translate([0,y_smooth_rod_length/2+2-22,8+board_thickness])rotate([0,90,-90])nutwasher();
 176         // front nuts
 177         translate([0,-y_smooth_rod_length/2-2,8+board_thickness])rotate([0,90,-90])nutwasher();
 178         translate([0,-y_smooth_rod_length/2-2+22,8+board_thickness])rotate([0,90,90])nutwasher();
 179         }
 180 }
 181
 182 yside();
 183 translate([yrodseparation,0,0])yside();
 184
 185 // heat bed
 186 heatbed_height=board_thickness;
 187 color("Lime",0.25)
 188 translate([0,0,58-3+heatbed_height/2+5]) cube([bed_x_size,bed_y_size,heatbed_height], center=true);
 189
 190
 191 // Y belt holder
 192 translate([-yrodseparation/2+60.5   ,    0, 58-3+5-2.8]) rotate([0,90,-90]) ybeltholder();
 193 translate([-yrodseparation/2+60.5+12,   -5, 58-3+0-2.8-1]) screw(heatbed_height/2+8);
 194 translate([-yrodseparation/2+60.5-12,   -5, 58-3+0-2.8-1]) screw(heatbed_height/2+8);
 195 translate([-yrodseparation/2+60.5   ,-5-35, 58-3+0-2.8-1]) screw(heatbed_height/2+8);
 196
 197
 198 // bushings
 199 render(convexity=3) translate([yrodseparation/2   , -bed_y_size/4-10   , 50    -0.5]) rotate([0,90,90]) y_bearing();
 200 translate([yrodseparation/2+14, -bed_y_size/4-10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 201 translate([yrodseparation/2-14, -bed_y_size/4-10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 202
 203 render(convexity=3) mirror([0,1,0])translate([yrodseparation/2   , -bed_y_size/4-10   , 50    -0.5]) rotate([0,90,90]) y_bearing();
 204 mirror([0,1,0])translate([yrodseparation/2+14, -bed_y_size/4-10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 205 mirror([0,1,0])translate([yrodseparation/2-14, -bed_y_size/4-10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 206
 207 render(convexity=3) translate([-yrodseparation/2   , -10   , 50    -0.5]) rotate([0,90,90]) y_bearing();
 208 translate([-yrodseparation/2+14, -10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 209 translate([-yrodseparation/2-14, -10+10, 50+6.5-0.5-5]) screw(heatbed_height/2+8);
 210
 211 //--------------------------------------------------------------------------------------------------------------------------------
 212
 213
 214
 215
 216
 217
 218
 219
 220 //--------------------------------------------------------------------------------------------------------------------------------
 221 // Z axis
 222 //--------------------------------------------------------------------------------------------------------------------------------
 223 board_sides=120;
 224 board_w=bed_x_size+10+2*board_sides;
 225
 226 //// aluminum XZ board
 227 //translate([0,board_thickness/2,150])
 228 //%difference()
 229 //{
 230 //      cube([board_w,board_thickness,300],true);
 231 //      translate([0,0,-15])
 232 //      cube([bed_x_size+10,board_thickness+2,200],true);
 233 //}
 234
 235
 236 // Z motor mounts
 237 translate([-board_w/2-5+12-board_thickness,12-board_thickness,50])
 238 rotate(-90) mirror([0, 0, 1])
 239 render(convexity=3) zmotorholder();
 240
 241 translate([-board_w/2-5+12-board_thickness-1, board_thickness / 2, 39])
 242 rotate([-90,0,-90])
 243 screw(25);
 244 translate([-board_w/2-5+12-board_thickness+30,12-board_thickness-15,41])
 245 rotate([-90,0,0])
 246 screw(25);
 247 translate([-board_w/2-5+12-board_thickness+10.5,12-board_thickness-10.5,42+7])
 248 rotate([180,0,0])
 249 M3screw();
 250 translate([-board_w/2-5+12-board_thickness+41.5,12-board_thickness-10.5,42+7])
 251 rotate([180,0,0])
 252 M3screw();
 253 translate([-board_w/2-5+12-board_thickness+10.5,12-board_thickness-10.5-31,42+7])
 254 rotate([180,0,0])
 255 M3screw();
 256
 257
 258 translate([board_w/2+5-12+board_thickness,12-board_thickness,50])
 259 rotate(-90) mirror([0, 0, 1])
 260 mirror([0,1,0])
 261 render(convexity=3) zmotorholder();
 262
 263 translate([board_w/2+5-12+board_thickness+1, board_thickness / 2, 39])
 264 rotate([90,0,-90])
 265 screw(25);
 266 translate([board_w/2+5-12+board_thickness-30,12-board_thickness-15,41])
 267 rotate([-90,0,0])
 268 screw(25);
 269 translate([board_w/2+5-12+board_thickness-10.5,12-board_thickness-10.5,42+7])
 270 rotate([180,0,0])
 271 M3screw();
 272 translate([board_w/2+5-12+board_thickness-41.5,12-board_thickness-10.5,42+7])
 273 rotate([180,0,0])
 274 M3screw();
 275 translate([board_w/2+5-12+board_thickness-10.5,12-board_thickness-10.5-31,42+7])
 276 rotate([180,0,0])
 277 M3screw();
 278
 279
 280
 281 // Z rod mounts
 282 //translate([-board_w/2-5,0,260])
 283 translate([-board_w/2-5+12-board_thickness,12-board_thickness,430])
 284 rotate(-90)
 285 render(convexity=3) zrodholder();
 286
 287 translate([-board_w/2-5+12-board_thickness-1, board_thickness / 2, 430+7.5])
 288 rotate([0,90,0])
 289 screw(25);
 290 translate([-board_w/2-5+12-board_thickness-1+34,12-board_thickness+8-23,430+6.5])
 291 rotate([-90,90,0])
 292 screw(25);
 293
 294
 295 //translate([board_w/2+5,0,260])
 296 translate([board_w/2+5-12+board_thickness,12-board_thickness,430])
 297 rotate(-90)
 298 mirror([0,1,0])
 299 render(convexity=3) zrodholder();
 300
 301 translate([board_w/2+5-12+board_thickness+1, board_thickness / 2, 430+7.5])
 302 rotate([0,-90,0])
 303 mirror([0,1,0])
 304 screw(25);
 305 translate([board_w/2+5-12+board_thickness+1-34,12-board_thickness+8-23,430+6.5])
 306 rotate([-90,90,0])
 307 mirror([0,1,0])
 308 screw(25);
 309
 310 // Z rods
 311 module z_rods()
 312 {
 313         color("MediumBlue")
 314         translate([board_w/2-4-12+board_thickness,-26+12-board_thickness,42])cylinder(h=z_smooth_rod_length,r=bushing_z[0]);
 315     echo (z_smooth_rod_length);
 316         color("Aqua")
 317         translate([board_w/2-4-12+board_thickness-17,-26+12-board_thickness,56])cylinder(h = 390, r=2.5);
 318 }
 319
 320 z_rods();
 321 mirror([1,0,0])z_rods();
 322 //--------------------------------------------------------------------------------------------------------------------------------
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333 //--------------------------------------------------------------------------------------------------------------------------------
 334 // X axis
 335 //--------------------------------------------------------------------------------------------------------------------------------
 336
 337 // move the x-axis up 20cm (for visualization only)
 338 x_axis_height=200;
 339 x_smooth_rod_length=450+board_thickness*2+10;
 340
 341 // X ends
 342 translate([-board_w/2+4+12-board_thickness,-26+12-board_thickness,140+ x_axis_height])
 343 rotate([0,0,90])
 344 //rotate([0,180,0])
 345 render(convexity=4) x_end_motor();
 346
 347 translate([board_w/2-4-12+board_thickness,-26+12-board_thickness,140 + x_axis_height])
 348 rotate(90)
 349 //rotate([0,180,0])
 350 render(convexity=4) x_end_idler();
 351
 352 // bearing guide
 353 translate([board_w/2-4-12+board_thickness-27,-26+12-board_thickness-9-(10-(7+0.9*2))/2,140 + x_axis_height+27])
 354 rotate([90,0,0])
 355 bearing_guide();
 356
 357 // X rods
 358 for(i=[0:1])
 359 color("MediumBlue")
 360 translate([1.5,-12+12-board_thickness-28,-3+149+i*45 + x_axis_height])rotate([0,90,0])cylinder(h=x_smooth_rod_length,r=4,center=true);
 361
 362 // X carriage
 363 translate([0,-12+12-board_thickness-28,-3+149 + x_axis_height])
 364 rotate([0,90,0])
 365 translate([-45,0,75])
 366 rotate([0,180,0])
 367 render(convexity=3) x_carriage();
 368
 369 // small nuts
 370 translate([0,-12+12-board_thickness-28,-3+149 + x_axis_height])
 371 rotate([0,90,0])
 372 translate([-45+20,0+9,75-3])
 373 rotate([90,0,0])
 374 M3nut();
 375
 376 translate([0,-12+12-board_thickness-28,-3+149 + x_axis_height])
 377 rotate([0,90,0])
 378 translate([-45+20,0+9,75-33])
 379 rotate([90,0,0])
 380 M3nut();
 381
 382 translate([0,-12+12-board_thickness-28,-3+149 + x_axis_height])
 383 rotate([0,90,0])
 384 translate([-45+20,0+9,75-53])
 385 rotate([90,0,0])
 386 M3nut();
 387
 388 translate([0,-12+12-board_thickness-28,-3+149 + x_axis_height])
 389 rotate([0,90,0])
 390 translate([-45+20,0+9,75-83])
 391 rotate([90,0,0])
 392 M3nut();
 393
 394 // belt clamp
 395 translate([0-28,-12+12-board_thickness-28-10,-3+149 + x_axis_height-7])
 396 rotate([0,90,0])
 397 translate([-45,0,75])
 398 rotate([0,90,0])
 399 x_beltclamp();
 400
 401 // belt clamp
 402 translate([0-28-30,-12+12-board_thickness-28-10,-3+149 + x_axis_height-7])
 403 rotate([0,90,0])
 404 translate([-45,0,75])
 405 rotate([0,90,0])
 406 x_beltclamp();
 407
 408 //--------------------------------------------------------------------------------------------------------------------------------
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431 //--------------------------------------------------------------------------------------------------------------------------------
 432 // Frame (box style)
 433 //--------------------------------------------------------------------------------------------------------------------------------
 434 module pl(x=100,y=100,z=board_thickness){
 435         cube([x,y,z]);
 436 }
 437 module p3bscorner(){
 438         translate([    board_thickness*1.5+3,-0.5-board_thickness,board_thickness/2])rotate([-90,0,0])screw();
 439         translate([450-board_thickness*1.5  ,-0.5-board_thickness,board_thickness/2])rotate([-90,0,0])screw();
 440         translate([450/2                    ,-0.5-board_thickness,board_thickness/2])rotate([-90,0,0])screw();
 441         color([0.5,0.5,0.5,0.8])pl(x=450);
 442         color([0.5,0.5,0.6,0.8])rotate([90,0,0])pl(x=450);
 443 }
 444 module p3bsgantry(){
 445         separation=10;
 446         translate([450-separation,-100-separation   ,board_thickness*2+1])mirror([0,0,1])screw();
 447         translate([450-separation, 100+separation+50,board_thickness*2+1])mirror([0,0,1])screw();
 448         translate([350+separation,-100-separation   ,board_thickness*2+1])mirror([0,0,1])screw();
 449         translate([350+separation, 100+separation+50,board_thickness*2+1])mirror([0,0,1])screw();
 450
 451         translate([350+separation,-200+separation   ,board_thickness*2+1])mirror([0,0,1])screw();
 452         translate([350+separation, 200-separation+50,board_thickness*2+1])mirror([0,0,1])screw();
 453         color([0.5,0.5,0.6,0.9])translate([450,-200,board_thickness])rotate([0,0,90])pl(x=450);
 454         translate([0,-200,0])color([0,0,0,0.3])p3bscorner();
 455         translate([0, 250,0])color([0,0,0,0.3])mirror([0,1,0])p3bscorner();
 456 }
 457 module boxframe(top=false){
 458         translate([300-board_thickness                      ,-200.5-board_thickness,board_thickness/2+3])rotate([-90,0,  0])screw();
 459         translate([200+board_thickness+board_thickness/2    ,-200.5-board_thickness,board_thickness/2+3])rotate([-90,0,  0])screw();
 460         translate([300-board_thickness                      , 250.5+board_thickness,board_thickness/2+3])rotate([ 90,0,  0])screw();
 461         translate([200+board_thickness+board_thickness/2    , 250.5+board_thickness,board_thickness/2+3])rotate([ 90,0,  0])screw();
 462         translate([300.5+board_thickness                    ,-200+board_thickness  ,board_thickness/2+3])rotate([ 90,0,-90])screw();
 463         translate([300.5+board_thickness                    ,-100-board_thickness  ,board_thickness/2+3])rotate([ 90,0,-90])screw();
 464         translate([300.5+board_thickness                    , 250-board_thickness  ,board_thickness/2+3])rotate([ 90,0,-90])screw();
 465         translate([300.5+board_thickness                    , 150+board_thickness  ,board_thickness/2+3])rotate([ 90,0,-90])screw();
 466
 467         // 3mm separation for the screw heads at the bottom of the structure
 468         //translate([300,-180,0])rotate([0,0,90])color([1,0,0,0.35])pl(x=400,z=3);
 469         translate([300,-200,3])rotate([0,0,90])color([0,0,1,0.55])pl(x=450);
 470
 471         translate([300+board_thickness,0])rotate([0,-90,0])color([0,0,0,0.4])p3bsgantry();
 472         if(top){
 473                 translate([200+board_thickness+board_thickness/2,-200-board_thickness/2,450+board_thickness+1])mirror([0,0,1])screw();
 474                 translate([200+board_thickness+board_thickness/2, 250+board_thickness/2,450+board_thickness+1])mirror([0,0,1])screw();
 475                 translate([300-board_thickness-board_thickness/2,-200-board_thickness/2,450+board_thickness+1])mirror([0,0,1])screw();
 476                 translate([300-board_thickness-board_thickness/2, 250+board_thickness/2,450+board_thickness+1])mirror([0,0,1])screw();
 477                 translate([300+board_thickness/2                ,-150                  ,450+board_thickness+1])mirror([0,0,1])screw();
 478                 translate([300+board_thickness/2                , 200                  ,450+board_thickness+1])mirror([0,0,1])screw();
 479                 translate([300+board_thickness,-200-board_thickness,450])rotate([0,0,90])color([0,0,1,0.55])pl(x=450+board_thickness*2);
 480         }
 481 }
 482
 483
 484 translate([-25,312,0])rotate([0,0,-90])color([0,0,0,0.4])
 485 boxframe(true);
 486 // floor
 487 //color([0.8,0.8,0.2,0.35])translate([0,0,-100])cube([800,800,200],true);
 488 //--------------------------------------------------------------------------------------------------------------------------------
 489
 490
 491
 492
 493
 494
 495
 496
 497 //--------------------------------------------------------------------------------------------------------------------------------
 498 // Parts to fix Y axis to the frame
 499 //--------------------------------------------------------------------------------------------------------------------------------
 500 // y brackets, used to fix the threaded rods of the y axis to the wooden XZ frame.
 501 translate([-bracket_width(12)/2  +yrodseparation/2,-3+12    ,board_thickness+3])                  yrodbracket(12, 3, 3);
 502 translate([-bracket_width(12)/2  -yrodseparation/2,-3+12    ,board_thickness+3])                  yrodbracket(12, 3, 3);
 503 translate([ bracket_width(12)/2  +yrodseparation/2, 3+12+100,board_thickness+3])rotate([0,0,180]) yrodbracket(12, 3, 3);
 504 translate([ bracket_width(12)/2  -yrodseparation/2, 3+12+100,board_thickness+3])rotate([0,0,180]) yrodbracket(12, 3, 3);
 505 //--------------------------------------------------------------------------------------------------------------------------------
 506 translate([-bracket_width(12)/2+6+yrodseparation/2,12+3+3     ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 507 translate([ bracket_width(12)/2-6+yrodseparation/2,12+3+3     ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 508 translate([-bracket_width(12)/2+6+yrodseparation/2,12+3+3+12  ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 509 translate([ bracket_width(12)/2-6+yrodseparation/2,12+3+3+12  ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 510
 511 translate([-bracket_width(12)/2+6-yrodseparation/2,12+3+3     ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 512 translate([ bracket_width(12)/2-6-yrodseparation/2,12+3+3     ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 513 translate([-bracket_width(12)/2+6-yrodseparation/2,12+3+3+12  ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 514 translate([ bracket_width(12)/2-6-yrodseparation/2,12+3+3+12  ,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 515
 516 translate([-bracket_width(12)/2+6+yrodseparation/2,-12+3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 517 translate([ bracket_width(12)/2-6+yrodseparation/2,-12+3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 518 translate([-bracket_width(12)/2+6+yrodseparation/2,    3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 519 translate([ bracket_width(12)/2-6+yrodseparation/2,    3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 520
 521 translate([-bracket_width(12)/2+6-yrodseparation/2,-12+3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 522 translate([ bracket_width(12)/2-6-yrodseparation/2,-12+3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 523 translate([-bracket_width(12)/2+6-yrodseparation/2,    3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 524 translate([ bracket_width(12)/2-6-yrodseparation/2,    3+3+100,board_thickness+bracket_height(3)+0.5])rotate([180,0,0])screw();
 525
 526 //--------------------------------------------------------------------------------------------------------------------------------