Engraves are suddenly bad

[Jotnar]

One more variable to consider is whether or not your material is completely flat to the bed. Here’s a good post on the subject…

GF not cutting through

My experience is that there’s “flat” then there’s FLAT . A very common gotcha is that even a visually undetectable warping of the material can cause issues. If you tap anywhere on your material and hear a click or an hollow sound, it’s not FLAT . Your best bet is to cut out a dozen or so Honeycomb Bed Holddown Pins and use them to make absolutely sure your material is firmly secured. I cut out a few from draftboard scraps leftover from various jobs – you cannot have too many of these. …

Manual focus will exacerbate focus issues anywhere the material is even slightly warped.