I have two taz 6 printers and one started having loud Y travel. There was some kind of vibration going on, I could see the Y belt vibrate when it moved. I tried readjusting the bed, adding some lubricant. I even tried replacing the motor with a spare I had.
In tried moving the printer to the floor incase it was the bench but no change.
Then I went for broke and did a bed swap between my two printers the other one worked fine. I easily swapped the two beds and guess what, the vibration was still there with a totally different bed!
What the hell is going on?