Banding on large burn area

What would be the cause of the ? banding ? I think that’s what it’s called. The wording on the project was perfect and used the same settings.
Do i need to slow it down and lower the power since its a graphic?

On an Ortur laser, it’s likely the squishy roller wheels along that axis have developed flat spots.

Checking all the mechanical adjustments and tightnesses on both axes may help, although the rollers can be permanently deformed.

This advice is for a Sculpfun, but the mechanics will look familar:

https://diode-laser-wiki.com/documentation/guide-to-mechanical-adjustments/

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