For people that were curious about the problem and solution:
The problem was inside one of the xy stepper motors. Some dust from the wear of the pulleys dropped into the bearings inside the stepper motor. I have disassembled both xy stepper motors and replaced the bearings (2 per motor, 4 in total) and cleaned the inside of the stepper motors. It is very important that there is no greace or dust inside it when reasembling! This fixed the problem and my stepper motors are running smoothly again.
@buglykitty, the printer was running for like 3000 hours, FYI.Edited by jechsturk
It sounds like the gears or belts may be grinding. Check that those and the rods are clean, and if not, clean them. It may also help to grease the bearings a little bit. How long have you been using this printer? It might just be old and the grease has dried up or too much dust has collected on the rods or lead screws. I would just give cleaning a try! Hope this helps!Edited by buglykitty
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