I suggest you take off your arm, clean it and oil it, and try again. If it still doesn't work, you can call after-sales service.

It is possible that the parts are damaged, the lines are blocked or the limit switches on the left and right controls are out of order, which requires maintenance, otherwise it cannot be used and should be sent to a professional maintenance organization.

Robot is a kind of machine, especially a programmable computer that can automatically perform a series of complex actions.