Check that it is level: are all 4 feet touching the floor?

If the floor is un even it's possible for your machine to rock or 'wobble' when it spins. At the front are 2 feet on either side that can be adjusted to compensate for any uneven floors. Simply unscrew them until the machine is stable and will not move or wobble on the floor. Once the product is level and not rocking secure the nut to lock the foot in position.