I have been using a Sculpfun S30 Pro Max 22W since 17 days ago and it work without problem, but today after angrave in acrylic a photo (yesterday) when I tried to cut squares, circles, etc and I find a double line in the Y axis.
The circles and squares, did you do them in a single pass or multiple passes?
If you did a single pass, it should be a lens (or blocked nozzle) issue, if you did multiple passes, then it’s a mechanical issue.