Noticed an issue with the engraving on my Speedy 400.

The laser seems to be losing track of where it should fire. It seems to be more noticeable as it moves between short and long strokes, but it seems to affect engraving quality regardless.

I checked the belt tension and it seemed fine. Beam alignment was good. What could be causing this? Is it something I can fix myself or will I need to get a tech out? Would like to have this machine up again as soon as I can.

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