The aggressive control plan of the automatic slitting machine is to use a large motor to drive the rewinding and unwinding shaft. The rewinding and unwinding shaft is equipped with a magnetic powder clutch. The current resistance of the magnetic powder clutch is regulated to control the resistance it generates to control the appearance of the data. tension. Magnetic powder clutches and brakes are a special type of automated fulfillment component. The torque transmitted through the magnetic powder filled in the working gap can change the magnetic state of the magnetic powder by changing the magnetic current, and then adjust the transmitted torque. It can be used for stepless speed regulation from zero to synchronous speed. It is suitable for high-speed section fine-tuning and medium and small power speed regulation system. It is also used to adjust the torque by adjusting the current to ensure that the tension during the winding process adheres to a constant unwinding or rewinding tension system.