Glowforge keeps skipping around for no reason

I don’t see where anyone asked if you checked and adjusted the belt tension on the carriage, the one that moves the head along the X axis.

That would be the first thing I would do. Unless your machine has been used a lot and the belt is worn, it’s likely just a tension issue.

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I agree that this looks like a tension problem. The circles are not distorted, but the carriage doesn’t seem to access the right side correctly. When you clean the air assist fan, do you loosen the pulley wheel or do you remove the carriage plate without changing the tension of the belt?

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