Hello Guest it is March 29, 2024, 10:32:19 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 - RICH

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 »
131
General Mach Discussion / Re: homing sequence (G28)
« on: February 08, 2019, 05:29:57 AM »
Fred,
G28 X ..... Z..... axis will move via an the intermediate point. When you don't specify an intermediate point by just coding
G28 the current point is considered the  intermediate point. See 10.7.8 in Using MACH3TURN manual for definition of the
g codes ( which can be confusing ).

I strongly suggest you actually spend some time playing with the command using singular axis and combination of both axes when using G28. The actual axes movement can get confusing quickly so be care full.

RICH


 

132
General Mach Discussion / Re: Lathe making moves not in Gcode
« on: February 06, 2019, 07:54:27 PM »
Vince,
Cute little spark plugs your doing............... :),

The code you posted does exactly what the program called for, except it never changes the tool because you
need an M6 to do whatever you want to do for the tool to be changed, thus it just runs through the complete program
program and ends on X0.020 Z0.005.

Don't know how you are setting up the job, even the modes you are in, as the program just seemed incomplete.

Now you say you inserted a M0 and removed the T2 and the program stops.
So the controlled point would ne located per the code  G0 X1.000 Z-0.100.

RICH

133
General Mach Discussion / Re: Lathe making moves not in Gcode
« on: February 06, 2019, 07:05:19 AM »
Post the complete gcode file.

RICH

134
Mach4 General Discussion / Re: RPM variation with G76 cycle use
« on: February 04, 2019, 08:33:19 AM »
Have a good reading / study of Threading On the Lathe Mach3 write up which can be found in members doc's.

Can't be of any help relative to Mach 4.

RICH

135
General Mach Discussion / Re: Lathe tool table
« on: February 04, 2019, 08:23:47 AM »
Vince,
I use a custom screen set which has numerous changes done to the Three Page Lathe Screen below.

Three Page Lathe Screen
https://www.machsupport.com/forum/index.php?topic=13548.0

I created a seperate Tool Setup page and on that page all tool probing is done. I use a simple tool setter
and probe to the appropriate surfaces. Additionaly I can probe to find lathe center, adjust probed offset
values, set a tool change location, but most importantly any lathe tool can be probed. By the way, a tool
setter does not need to be mounted in the chuck as it can be located anywhere as long as you can touch
off to it.

Additonaly that page allows for manipulation of the tool table such that it can opened/ saved / exported /
imported / reset / and recall a master tool table.

The screen set has two other pages which probe, one manualy and another automaticaly.
The manual one was done so I could do something quick and dirty to generate code, find points
along a profile ( whatever ) using a probe and create gcode or a dxf file. The other page is accuarte probing
to find points and generate a cad drawing based on the points. Very easy to duplicate a profile of something
with min amount of work. It beats scanning or the "bed of nails" approach!

Spent a lot of time, back a few years ago, reviewing anything having to do with probing and lathe screen sets
and just applied the best of the best to how and what "I" wanted.

RICH

136
General Mach Discussion / Re: Mach3turn tool table is making me crazy
« on: February 01, 2019, 06:48:46 AM »
John,
I use probing for touching off  "ALL"  tools and use a simple tool setter.  Find that it is the most accurate and repeatable of all the methods. I do not double probe the touch off but rather probe at  a slow rate eliminating the over travel. I use a few macro's but the button scripting takes care of what is needed to be done.
 
By "ALL" tools I am meaning things like reamers, drills, whatever and a few buttons provide for any changes required. To touch off any lathe tool you need 4 surfaces / references when probing.

I use the master tool concept such that tool one is used to define all the other tools. It is not used for machining and it is just a piece of 1/2 round carbide and the sides are parrel and the face  is perpendicular to the sides. Once the tool table is populated any tool can become the master tool. If tool #1 is broke and needs to be replaced then you can use say tool 10 to replace tool #1 with the proper offset.

My tool setter is home made and cheap! Simply it is a piece of ground round with a 1" micrometer standard on the end of it. The mike standard is mounted on the end of the round, centered and the flat surfaces parrel to the round.

I just put electrical tape on the round so i can probe to any of the mike standards four surfaces.
Now you say .....tape on the ground round and he is accurately finding offsets.....I hear it now...give me a break, Rich! ::)
It matters not what is holding the tool setter, you must center it using an indicator 0.0001". The tool setter just provides a common reference X Z plane for the tool  to touch off. You need that to have "0" runout in the X direction and the plane can be slightly above or below lathe center. My three jaw creates a small runout on the tool setter, so it's easy to center the setter on lathe center.

BTW, I don't use home swiches, always start by using the tool setter to find lathe X center via probing. Then manually define a  home and tool change location and both are at the same location (KISS). Then define the G54 Work offset. I use a quick change and probably the most number of tools used in one machining operating was around 8 tools or so.
 
RICH

137
General Mach Discussion / Re: Lathe tool table
« on: February 01, 2019, 05:46:39 AM »
Vince,
If you watched the video you now know that probing is just a way of "automating the process" of  how  a tool
will touch a surface and provide data to the controller for using the different tools.
You can see that he modified the screen set to make it work for him. It is somewhat lacking in my opnion.

The best advice  I can give to someone who is going to use a cnc lathe is study / educate themselves on the following:
- Tool geometry
- Different methods to touch off tools
- Tool offsets / tool table
- Work offsets
- Machine and Work offsets

Once the user is grounded in the basics much of the other stuff will fall in place. Time spent now will save you
hours later.

Later on the user can choose just what level of automation they require. Heck....I still don't use switches!
 
RICH

138
General Mach Discussion / Re: Lathe tool table
« on: January 28, 2019, 06:55:21 AM »
Vince,
I need to review my posted replies as they may need a few clarifications.

Later,
RICH

139
General Mach Discussion / Re: Lathe tool table
« on: January 28, 2019, 06:12:32 AM »
Vince,
Do you have any tool offsets in the tool table for tool#1 which is your master tool?

RICH

140
You need to tune the steppers such that they won't skip for the work you intend on doing with your machine. Find the velocity of the motors where they will skip, then set the max velocity 20%  - 30% below where they skipped. Then find the acceleration value where they will skip and set the acccelration 20%-30% below where they start to skip.

Accuracy and reliability are more important than speed. Use of high feed rate will cause the stepper to skip if it doesn't have the needed torque to do the work.

RICH

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 »