Hello Guest it is March 02, 2024, 02:45:18 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 »
3791
General Mach Discussion / Re: Mach3 and Tapmatic Tapping Head
« on: October 25, 2012, 10:10:56 AM »
I always tap in G95 mode. Makes the math easy on the feedrate.   Heck take it apart it is NOT that complicated. 


3792
General Mach Discussion / Re: Mach3 and Tapmatic Tapping Head
« on: October 24, 2012, 11:32:52 PM »
Try here for the CNC Gcode example. I have one of those bad boys sitting in the tool crib. You MAY want to double check the oil in the oil for signs of Coolant contamination and change it out if needed.

http://tapmatic.com/images/pdf/install_instructions.pdf

Just a thought, (;-) TP

3793
General Mach Discussion / Re: Mach3 and Tapmatic Tapping Head
« on: October 24, 2012, 11:20:41 PM »
IF you log onto the tapmatic website you will find code examples for their tapping heads (;-) it is a bit different than you think.

Just a thought, (;-) TP

3794
Pretty close (;-) You will just have to try it.

(;-) TP

3795
General Mach Discussion / Re: Building a stepper motor dyno
« on: October 24, 2012, 05:59:40 PM »
HIYA Jeff, I saw your blog, interesting.  I have built a FEW (;-) dyno's over the years, Load brake(water,Hydraulic,Mechanical), inertial, eddy current, etc

It appears you will need to have many accurate resistors on hand to vary the load??

IF you are just looking for a torque/rpm curve you may want to consider an inertial dyno. You simply hook the motor to the input shaft and spin the motor  to full rpm against the inertial load of the flywheel. Torque is a function of Accelleration rate and inertial value of the wheel. Easy to calculate.

The inouts need would be the inertial value of the wheel AND a simple tachometer or better an encoder.

NOW it would NOT do steady state testing as the wheel HAS to be accellerating to obtain a torque value.

For steady state test you may want to consider an eddy current style OR a load brake based on a DC motor with field input to produce load. The motor is floated from both ends on bearings and a load cylinder offset from the motor centerline is used to measure force. You can vary the motor brake LOAD by varying the Voltage to the field input.  You still run a large resistor bank to absorb the output from the motor running in generator mode. 

Again easy to see torque as it is direct readout from the load cylinder reading and the RPM is from a simple  encoder.

Just a thought, (;-) TP

3796
The THC up/down is an internal function of MACH3 used for plasma systems that HAVE a THC device.

IF you input a signal on the LPT pin that is setup as THCdown() MAch3 will drive the Z down reguardless of the Gcode values. It overrides the Z position internally and drives the Z down.

Same with THCup() only it drives the Z up.

YOu can build a simple 2 button systems and manually control(overide) the Z DURING a GCODE program run. THe problem here is you do NOT have precise control over the Z. It just does a TURN ON THE DRIVE to go down or TURN ON THE Drive to go up. (SLAP AND GO) The THC device itself regulates the Z based on the arc voltage it sees from the plasma cutter.

NOW you could build a simple SMALL variable speed (DC) gear reduction motor that has a disc with slots and and 2 optical switches 180 degrees apart.  When the signal #1 turns ON then activate the THCdown() and when the signal turns off stop.

When Switch#2 turns on then active THCup().

You would have to adjust the speed based on the time you need each function to work. NOT precise but could work. You can also adjust the %speed of the Z motor

(;-) TP

3797
Dan they also run encoders so that the Z can follow the spindle rpm to do a controlled decent and asscent.  MAch3 does not have that ability as a spindle .

(;-) TP

3798

OK is this possible from Mach3 CB ? yes

Will I release the test CODE? NO it is still dangerous. THe running of such a function COULD end life as we know it on this planet (;-) .


What you have to do is Hard wire through relays 2 outputs from MACH3 back into the LPTport pins and setup THCup and THCdown as inputs

Next create code to trigger the thc to go down unitll you are a certain level. THEN trigger the THC up to go back up to a certain level.

IT takes  DO while loops running concurrently to make it function. The big problem is keeping the CB macro from buffer overflow. IF it does then ODD things can happen and uncontrolled movement HAS been know to happen. ALSO you have to make SURE you do not overload the CPU as then either the Gcode or MACRO or both will lock up.

You also have to provide safeties to be able to break out of the loops AND safely shut the function down or you can end up in an infinate loop with no easy way out other than [CTRL ALT DELETE} and reboot.

IF you error out you MUST restart MACH3 to clear the CB threads that can create a problem by showing up later in your code.

IF " I " can figure it out YOU can also(;-) , (;-) TP

3799
IF you have home switches then after a program run you can do VERIFY and mach will return to the home switches to verify you have not lost steps.  

HOW fast do you normally cut ??  What are your Motor tuning values   Vel?  accel?   We are down to MACH3 CV altering the path due to slow acceleration vs Feedrate. It will be MORE prevalent on curvy stuff rather than Straight sided stuff such as squares.

HOW far OFF is the cutting?  tenths, hundreths, thousanths ?

IS it always to BIG or to small?

BUT let me re verify the problem. You cut the guitar body out then Flip it over and set it into a fixture to  cut other features and it does not fit in the fixture ? How did you cut the fixture to hold it?

SHooting in the dark, (;-) TP

 

3800
Still working on it,

I have seen some of the strangest things doing so.



 (;-) TP

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 »