I have recently upgraded my laser cutter with some better hardware and controlers in order to use LightBurn and for better performance.
I have been having issues with the etching or fill where there is origin drift or some sort of slip in the x axis. I have made adjustments to the controller settings, reducing speed, acceleration and such parameters which has not improved the issue. I have set the PWM rising edge valid which improved some of the problem. However I am still getting drift during the initial portion of the etching. You can see the shape on the left which had the bigger drift error before I set the PWM to rising for the shape on the right. However if you look at the second image you can see I am still getting drift during the first 10mm or so of the etch.