I have an FT-6. During the middle of a print, the Y-axis stopped moving properly. When the printer is off I can easily move the Y-axis with my hand, and it seems to move very well, without any impediment. The problem is only when the stepper motor is trying to move the y-axis. When it tries to move the y-axis, instead of moving smoothly, it behaves as though it is colliding with something and loudly gets nowhere. I thought the issue might be the motor, so I swapped it with a different motor, but the issue persists. I also swapped the driver for a different one, to no avail. I'm at a loss for what could be wrong, so any help that anyone can offer in troubleshooting this issue would be much appreciated.