* The main electrical machinery is controlled: Have section adjust and control rapidly by inverter, but in 0-2700m/min wanton to regulate, the speedometer shows the present speed.
* The movement and tension are controlled: Coordinated by the automatically controlled machine movement of the microcomputer, close the ring and adjust the best tension.
* Shut down automatically: Have all over axle concurrently shut down automatically , break and protect and brake , rank overload of motor of line brake, Arrange line overshoot and brake and converter brake the function automatically when being main and motor unusual.