Hello Guest it is March 18, 2024, 10:17:00 PM

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 - Tweakie.CNC

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 »
5581
Hi Richard,

Welcome to the forum, nice to see another member from the UK.

Don't forget to post some pictures of the work you do with your new CNC machine.

Tweakie.

5582
Thanks Guys.

Quote
Tweaks does this assume that the 2 points are inline with the axis when referenced back to the drawing ?  IF not you have to account for that offset as well.  

Just a thought, (;-) TP

Hi Terry,

Yes indeed sir, you are quite correct.

If the Datum and Reference are vertically in-line (the angle is zero) then work re-positioning only takes the one referencing operation.

If the Datum and Reference are not in-line then the angle has to be referenced / calculated at the time of manufacture and stored.
Work repositioning can then be carried out by calculating the new angle, retrieving the original angle, subtracting one from the other then using the result for the Local System Rotate.

Tweakie.


5583
General Mach Discussion / Re: Backlash strangeness
« on: December 09, 2012, 10:46:31 AM »
Hi Ansen,

I am pleased that you have got it all sorted.

Now I am looking forward to seeing some pictures of your multi-layer acrylic works.  ;)

Tweakie.

5584
After some experimentation, this is what I have finally ended up with…

The camera can be used for X - Y tool positioning as follows;

By adding two new VB buttons to the Mach3 screen labeled Camera and Home;
Clicking the Camera button opens the video window, sets a slow jog rate and prompts for the Datum to be located.
Clicking the Home button closes the video window, resets the slow jog rate and moves both the X and Y axis (applying the offset) so that the spindle / tool is centered at the datum point.

The VB (Cypress Enable) scripts I have used to achieve this are as follows;

Camera button script;
 
Call SetUserLed(1102,1) 'open Klaus's video window
Call SetOemDRO(3,1) 'set slow jog rate to 1%
Code "(Locate Datum then click HOME)" 'message for status bar


Home button script;
 
SetUserLED(1103,1) 'close Klause’s video window
Call SetOemDRO(3,80) 'reset jog rate to 80%
Xs=GetOemDRO(59) 'read Xscale DRO
Ys=GetOemDRO(60) 'read Yscale DRO
Xmove = 70.850 * 1/Xs 'enter your camera offset here
Ymove = 1.070 * 1/Ys 'enter your camera offset here
Code "G91 G0 X" &Xmove & "Y" &Ymove 'make incremental move
While IsMoving () 'wait while that happens
Wend
Code "G90" 'go back to absolute moves
DoOEMButton (1008) 'zero X axis DRO
DoOEMButton (1009) 'zero Y axis DRO
Code "(Homing to Datum Complete)" 'message for status bar



To take advantage of the Local System Rotate function I have added 3 new VB buttons labeled A, B & C.

Button A opens the video window, sets a slow jog rate and prompts for the Datum to be located.
Button B resets the X an Y axis DRO’s to zero and prompts for the reference to be located.
Button C closes the video window, resets the slow jog rate, performs the calculations and moves the X an Y axis so the spindle / tool position is centered on the Datum location then sets the Local System Rotated DRO to the calculated value. The scripts I have used are as follows;

Button A script;
 
Call SetUserLed(1102,1) 'open Klaus's video window
Call SetOemDRO(118,0) 'reset system rotate DRO
Code "(Locate Datum then click Button B)" 'message for status bar
Call SetOemDRO(3,1) 'set slow jog rate to 1%


Button B script;
 
DoOEMButton (1008) 'zero X axis DRO
DoOEMButton (1009) 'zero Y axis DRO
Code "(Locate Reference then click Button C)" 'message for status bar


Button C script;
 
Sub Main()
Call SetUserLed(1103,1) 'close Klaus's video window
X1pos = GetOemDRO(800) 'read x axis DRO
Y1pos = GetOemDRO(801) 'read y axis DRO
If (Y1pos=0) Then GoTo Label1 'avoid divide by zero error
b = Atn(X1pos/Y1pos)*(180/(4*Atn(1))) 'calculate angle
b = b - (b*2) 'change sign (+/-)
Code "G0 X0 Y0" 'move to datum
While IsMoving () ‘wait for task to be completed
Wend
Xmove = 70.850 'enter your camera offset here
Ymove = 1.070 'enter your camera offset here
Code "G91 G0 X" &Xmove & "Y" &Ymove 'make incremental move
While IsMoving () ‘wait while that happens
Wend
Code "G90" 'go back to absolute moves
Call SetOemDRO(118,b) 'set system rotate DRO
Label1:
DoOEMButton (1008) 'zero X axis DRO
DoOEMButton (1009) 'zero Y axis DRO
Call SetOemDRO(3,80) 'reset jog rate to 80%
Code "(Process complete)" 'message for status bar
End Sub


(With both the Home button and the C button scripts my camera offset should be changed to suit your particular machine).

Obviously, everything is ‘work in progress’ and there will always be room for improvement so please feel free to change these scripts, as necessary, to suit your own particular application. My solution is presented here just as a guide for future development.

One further thought…
 
If, for example, a round circuit board was made and a datum and a reference had been established and the angle calculated (as mentioned above). This angle (angle1) could be stored as a VAR. If the round circuit board was removed from the work table then replaced (at a different angle) then by locating the same datum and reference and again calculating the angle (angle2) by subtracting one from the other the resultant angle when entered into the Local System Rotated DRO would be correct for work to be re-commenced on the circuit board as if it had never been removed and replaced.
 
It would perhaps be quite complicated to perform all the necessary math’s using a calculator but by using a VB script it could not be made more easy.

Tweakie.



5585
Show"N"Tell ( Your Machines) / Re: New Built - Beginning Stages
« on: December 08, 2012, 09:05:44 AM »
Hi Zig,

Ideally, of course, it would be best to use the purpose made (fully supported) linear slides but unfortunately they come at a price. However, there are many that have successfully used the draw slides for their CNC build but be aware that they can have their disadvantage…

I use some miniature (high cost, professional) versions, for laser optics positioning (which work on the same principal) and although they are smooth and very low friction sooner or later the cage, containing the balls, gets out of step with the slide - then they become ‘high friction’ when the balls have to 'skid' in order for the slide to reach it’s end stop and reset the cage positioning.  :'(

Please keep posting details, pictures or video links of you build – we all like to see pictures.  ;)

Tweakie.

5586
General Mach Discussion / Re: Mach 3
« on: December 08, 2012, 04:25:32 AM »
Within Mach3 - Config / Ports and Pins / Motor Outputs - change the 'Dir Low Active' state for your Z axis (this reverses the direction of the stepper motor).

Tweakie.

5587
Show"N"Tell ( Your Machines) / Re: New Built - Beginning Stages
« on: December 08, 2012, 02:51:17 AM »
Hi Zig,

Nice work and excellent video.

However, I think you will be disappointed with the performance, later on down the line, from those drawer slides supporting your gantry.

Just a thought – fitting two more (identical) slides (rotated 90 degrees radially) underneath the bed and connected to the cross member so that they close as the others are opening (and visa versa) may give some much needed extra support to the gantry.

Tweakie.

5588
General Mach Discussion / Re: Mach and PWM VFD setup help please
« on: December 07, 2012, 08:28:29 AM »
You may find this thread of interest http://www.machsupport.com/forum/index.php/topic,15455.0.html

Tweakie.

5589
General Mach Discussion / Re: Backlash strangeness
« on: December 07, 2012, 03:30:51 AM »
Basically, as I see it, you have 2 separate issues here ‘Banding’ and ‘Backlash comp’.

I have never used backlash comp so that issue is outside my comfort zone.

If you would care to Zip and email me a GCode sample file (preferably with approx. equal sized dots) which exhibits the banding issue I would be happy to run it on my machine and post the result. This should (with luck) determine if the banding is machine or software related.

Tweakie.

5590
No worries Chris, as Gerry has said your .xml file does not contain any license information (other than the last user name or serial number) so it is perfectly safe to send.

The license team are wise to the many scams that have been used to falsely try and obtain licenses.  ;)

Tweakie.

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 »