# Assistance with engrave - running off board **URL:** \ **Category:** LightBurn Software Questions\ **Tags:** omtech\ **Created:** [October 5, 2026, 4:18pm UTC](https://forum.lightburnsoftware.com/t/assistance-with-engrave-running-off-board/192957 "2026-10-05T16:18:00Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![ednisley](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/ednisley/32/40455_2.png) [@ednisley](https://forum.lightburnsoftware.com/u/ednisley)\ **Post date:** [October 5, 2026, 5:04pm UTC](https://forum.lightburnsoftware.com/t/assistance-with-engrave-running-off-board/192957/3 "2026-10-05T17:04:29Z")
> [@Bsquared88](#): > > 1. Is the drifting caused by missing steps/buffer overruns from the oversized file, or could it be an origin/overscan issue? Given that it’s a Ruida controller, this may be Yet Another Instance of the `PWM Rising Edge Valid` misconfiguration: > **[Ruida-Specific Settings - Slanted Or Skewed Job Results - LightBurn User Guide](https://docs.lightburnsoftware.com/2.2/Troubleshooting/JobQuality/SlantedOrSkewed/#ruida-specific-settings)** > > If only the fill is slanted on a Ruida device, your motor pulse step polarity is probably reversed. To fix this, you can toggle the PWM Rising Edge Valid setting for one or both axes, depending on the angle of the skew or angle. You can find this... Because it’s triggered only by specific conditions, the “it always worked before” line of reasoning isn’t valid. 😁 A previous discussion may be enlightening: > [@Image shifting and bunching up but cut out is OK](https://forum.lightburnsoftware.com/t/image-shifting-and-bunching-up-but-cut-out-is-ok/145984): > > Red-Black 90w Laser Ruida controller engrave 400mm/s 25% Fill 450mm/s 20% Cut 25mm/s 65% Birch ply held down pins belts are tight so are stepper motors When doing a engrave/fill and cut I get the fill shift while the engrave bunches up, cut out in just fine. This is repeatable, and all come out the same, like it was meant to be, how do I attach image? Protip: Save the original settings! > [@Laser cutter drift - help would really be appreciated](https://forum.lightburnsoftware.com/t/laser-cutter-drift-help-would-really-be-appreciated/191188/87): > > Ed, you were right. I’ve checked the backups from earliest to now. 22/11/23 x true y false 13/7/26 changed to true from your advice but I failed to see they were different pensive_face 16/7/26 changed both to false from Nicholas’ advice. Today both false - still cutting as it should. Clearly I have read your initial comment, got giddy reading the x=true and changed the y to match. I never tried both to false until Nicolas told me where I’d gone wrong. I’ve backed up th… --- _[View the full topic](https://forum.lightburnsoftware.com/t/assistance-with-engrave-running-off-board/192957)._