Numerical control turntable with gravity balance function and control method thereof

A numerical control rotary table with a gravity balance function comprises a support, a tray and a motor, the tray and the motor are arranged on the support, and the motor is used for driving the tray to rotate on the support. The device further comprises a rotating shaft core, a left balance wheel, a right balance wheel and a driving assembly. One end of the rotating shaft core is relatively fixed with the tray, and the other end of the rotating shaft core is fixedly connected with the driving assembly; the left balance wheels and the right balance wheels are equal in number and are rotationally connected to the rotating shaft core; the driving assembly is used for driving the left balance wheel and the right balance wheel to synchronously and reversely rotate and is in limiting fit with the left balance wheel and the right balance wheel when the numerical control rotary disc is in the working condition. The invention further provides a control method applying the numerical control turntable. Compared with t