Do you know can cause these horizontal lines when filling? The spacing is equal and occurs throughout the image.
I had to replace the motherboard of my Atomstack X20 Pro (the controller of one of the motors started to go crazy). I got a newer (supposedly faster) model, but these lines were not there before.
These lines are aligned with filling direction.
They are a lot less noticeable when I lower the line interval, but as I said - it was not there before (I used line interval 0.206 mm all the time for bigger projects).
I agree to Gil, this is most likely mechanical, not an issue with the main board. Another possibility is that your stepper was damaged as well, if the driver was damaged (though, those steppers are very robust, usually).
Side note: changing to a new mainboard doesn’t speed up a laser - the mechanics are the limiting factor.
I checked the wheels and cleaned them, doesn’t seems to change anything.
As for this motor, the problem is on the other axis (not the one where the controller was damaged). I will still try to stretch the belt from again. But again, it doesn’t look like it’s too loose or stretched too much.