Himiguel, you might want to post that responce at least one more time, not sure I got it.
Just Joking! Joking! Joking! Ha! Ha!
Okay guys so can someone enlighten me how this could be unless the speed is not consistant with the prior controller.
The controller powers either a single or multible motors, the motors have a collar ontop which the belt rests within and the other end goes arround the tables platter spinning it.
I would think there must be something going on with the speed if it's sonically making changes.