LaserUser.com Forum (formerly RDWorksLab)

Jeffrey Aley wrote: Fri May 14, 2021

Toby Hope wrote: Fri May 14, 2021

that might be just the wise angle phone lens, ive calibrated the xy and they’re spot in. i wouldn’t be too concerned about an oblong circle if it was smooth, it’s the tiny kink which follows down stream of the direction if cut . as if it’s got some slack when changing direction.

i have done the scan backlash compensation and sadly it doesn’t seem to have any effect on the cut process. but i have my scan dialled in which is great!

here’s a pic of a couple of targets with infill hopefully making it a bit clearer to see the discrepancy.14B69323-D696-4DA0-9443-1D2F3BF484A6.jpeg

The circles show classic mechanical backlash. The backlash calibration is shown here:
Screenshot 2021-05-14 080441.jpg

I forget if you also need to turn on the "backlash reapy optim", which is a typo for "backlash repay optim", where "repay" is Chinglish for "compensation", so this translates to "backlash compensation optimization". It is shown here:

Backlash.jpg

AFTER you adjust the mechanical backlash, THEN you'll need to (re-) adjust the power supply timing. We mistakenly consider this a "scan backlash adjustment". It's really an adjustment for the delay in the power supply (it does not turn on instantly).

This file is recommended for calibrating the backlash - it draws several rows of circles, and the start point of each circle is different, allowing you to see both X and Y backlash issues. I believe ATK Laser is no longer around (but am happy to be corrected).
BACKLASH TESTFILE ATKLASER.rld

Jeffrey Aley wrote: Fri May 14, 2021

Toby Hope wrote: Fri May 14, 2021

that might be just the wise angle phone lens, ive calibrated the xy and they’re spot in. i wouldn’t be too concerned about an oblong circle if it was smooth, it’s the tiny kink which follows down stream of the direction if cut . as if it’s got some slack when changing direction.

i have done the scan backlash compensation and sadly it doesn’t seem to have any effect on the cut process. but i have my scan dialled in which is great!

here’s a pic of a couple of targets with infill hopefully making it a bit clearer to see the discrepancy.14B69323-D696-4DA0-9443-1D2F3BF484A6.jpeg

The circles show classic mechanical backlash. The backlash calibration is shown here:
Screenshot 2021-05-14 080441.jpg

I forget if you also need to turn on the "backlash reapy optim", which is a typo for "backlash repay optim", where "repay" is Chinglish for "compensation", so this translates to "backlash compensation optimization". It is shown here:

Backlash.jpg

AFTER you adjust the mechanical backlash, THEN you'll need to (re-) adjust the power supply timing. We mistakenly consider this a "scan backlash adjustment". It's really an adjustment for the delay in the power supply (it does not turn on instantly).

This file is recommended for calibrating the backlash - it draws several rows of circles, and the start point of each circle is different, allowing you to see both X and Y backlash issues. I believe ATK Laser is no longer around (but am happy to be corrected).
BACKLASH TESTFILE ATKLASER.rld

Rodney Edington wrote: Fri May 14, 2021 It great to here you got it figured out. I knew it had had to be a backlash issue, but I've not used the software enough to know my way around it to help you.