Hello Guest it is April 17, 2024, 09:15:17 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - BR549

Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 »
6731
General Mach Discussion / Re: how to control z-axis brake
« on: June 05, 2010, 06:56:51 PM »
(;-) Where you have a built in wait state then that is not really a problem. BUT when you are trying to run the gcode transparently there is no way to avoid the time lag of the mechanism in relation to the flow of moves coming out of the buffer.

Try running your setup without the wait states, I bet you will randomly trip from positional errors with a servo OR miss steps from a stepper

The only way I have seen it done without problem was from a realtime system that incorperated the I/O sensing into the motion data control point so the movements could NOT occur until conditions were met.



6732
VB and the development of wizards / Re: start from line #
« on: June 05, 2010, 04:46:04 PM »
I don't know.

 I do not work on code that may endanger the operator or machine

6733
General Mach Discussion / Re: how to control z-axis brake
« on: June 05, 2010, 02:52:21 PM »
O K here we go again(;-)

YOU "could"  monitor the Z axis velocity and

 IF  Zvel =zero then apply output signal to apply brake

AND
IF Zvel <> zero then turn off output to release brake


BUT you run into the latency problem with using a buffered system. The Z moves are already stacked into the buffer ready to go AND when the signal comes to run there is NOTHING in machs design that will allow the buffer to hold UNTIL the brake is releases fully before the Z can safely move without a loss of steps do to the drag of the brake untill it has fully released.

EVEN IF you had an intelligent drive that could do the function you could run into an accuracy problem as MACH is assuming that ALL drive can react very closely the SAME.  Testing has shown that 1 slow reacting drive out of 3 can cause a mispositional error . Mach has NO way of knowing the timeing points of the drives it just assumes ALL the moves have been made as a coordinated move. It would depend on the resolution and amount of drive dwell as to HOW MUCH error would be involved

With "any" form of monitoring the Gcode pulses to active or deactivate BY the time it "sees" the movement it is TOO LATE to release the brake.

In the normal world brakes are used to HOLD the axis when it is NOT active/enabled. It is UP to the motor to HOLD the axis in position when it is active/enabled. Mostly to HOLD the position when the machine is OFF and to Catch the axis in the event of a power failure and loss of holding force.

IF the axis cannot hold itself you have 2 options mentioned above. Increase the motor to the proper size OR counterweight it to require LESS holding force.

Hope that helps

6734
VB and the development of wizards / Re: start from line #
« on: June 05, 2010, 02:13:09 PM »
IT works just fine here. there is nothing wrong with the process just the application.

6735
General Mach Discussion / Re: DRIVING A STEPPER MOTOR LIKE SPINDLE
« on: June 05, 2010, 12:12:30 AM »
Hi Rene, The i/o sampling rate for mach using the VB engine is ONLY 10hz or 10 time per second, FAR FAR too slow for what you want. ALSO there can be a sync problem in vb/gcode where proceesses may get slowed down from high CPU loads.

This could create HUGE problems in keeping your machine in sync.

That said it may be possible to do it all in gcode with the striching being controlled with a stepper/servo motor that drives the head up and down through a mechanical motion conversion, rotary to osilating linear. Tha way it is posible to sync all moves to the position of the head.

BUT it will be a very very hard thing to GCODE as the head moves will be required to be broken down so xy can only move in specific periods and even then I am not sure they can be ran very fast as the speed b be controlled by the slowest axis and the more MICRO moves it has it the Z axis the slower the processing becomes.

For what you need you may want to consider a realtime motion controller board that can run at extremely high sample rates .

Hope that helps

6736
VB and the development of wizards / Re: start from line #
« on: June 03, 2010, 11:18:23 PM »
Amir look in the MACH Macro Programmers Manual, Page 57. That will tell you what you need to know.


6737
VB and the development of wizards / Re: start from line #
« on: June 03, 2010, 08:55:04 PM »
:-) LOL  HIYA Ian, we spend a LOT of time with new code proofing it to run correctly , but with plasma you never know when the torch will cough or sneeze and put the fire OUT. Then you have to stop and verify the torch and restart where you left off.

That was why we developed the stop/restart routine a time saver.

6738
VB and the development of wizards / Re: start from line #
« on: June 02, 2010, 07:16:33 PM »
IAN, Run from here does not work with plasma or jet cutting WITH a Top of material routine. The G28.1 or G31 throws a monkey wrench into the mix.

Also you must restart and stop the torch at each cut point.

I gave Amir a solution that we use here ,(Stop and restart as an auto function ran by screen buttons or hotkeys) actually gave him 2 solutions but they don't seems to work on his end  for some reason.

http://www.machsupport.com/forum/index.php/topic,14927.50.html

6739
General Mach Discussion / Re: RUN REVERSE, Serious problem
« on: June 02, 2010, 07:01:30 PM »
(;-) That was why we had the OTHER version as one did not have to deal with the restat window, But is does not seem to work on your end.

Right now I don't have any other suggestions other than working with the old version and see what it takes to make it work on your end.

(;-)

6740
General Mach Discussion / Re: Display Spindle Temperature on Mach3 ??
« on: June 02, 2010, 10:26:28 AM »
it would be best to set up the timer in a brain to set an led. Sometimes trying to do a timer loop in the macropump causes problems with CPU hogging.

Set the brain to set an LED /on. Then when the macropump sees the LED/ON then do" code whatever" AND set the LED to OFF.

Just a thought

Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 »