I have the 20x28 60w Red/Black eBay with the Ruida Controller. Having an issue with cuts. For some reason when cutting thicker material 1/4 acrylic the cuts on the X axis are straight if you put the piece on its side, but cuts on the Y axis seem to have a chamfer to them. Tried setting focus at different heights to compensate but not having much luck. Not sure which section to post in so admin move accordingly sorry.
Cutting at 1mmsec / 30% power