The grinding sound may indicate the blade bearing assembly is starting to break down. We suggest you contact Customer Service to troubleshoot this problem.
Service, Returns & Troubleshooting
If you notice your motor is no longer turning the blades, you should unplug the machine, remove the container from the motor base, and look at the drive socket (the plastic circle surrounding the metal coupling where the container meets the base). The drive socket should be well-attached, but able to spin freely. If the drive socket is cracked, solidly attached and unable to move, or easily removed, contact Customer Service to request parts or service.
The container will slightly move on the base when the machine is turned on. But if your motor base is wobbling on the countertop, there is an issue with your drive socket or the rubber feet on the bottom of the machine. Please contact Customer Service for further assistance.