The slitter is a kind of mechanical equipment that cuts the wide paper or film into many narrow materials. It is often used in the printing and packaging machinery. In the past, the speed of magnetic powder clutch of slitter can not be high, because it is easy to cause high-speed friction of magnetic powder during operation, generate high temperature, shorten its service life, and in serious cases, it will block the operation of the machine, which will bring serious consequences to production. Seriously affected the production efficiency.

The traditional control scheme of the slitter is to use a large motor to drive the winding shaft. A magnetic powder clutch is added to the winding shaft. The resistance produced by the magnetic powder clutch is controlled by adjusting the current of the magnetic powder clutch to control the tension of the material surface. Magnetic powder clutch and brake is a kind of special automatic actuator. It transfers torque through magnetic powder filled in the working gap. Changing the magnetic current can change the magnetic state of magnetic powder, and then adjust the transmitted torque. It can be used for stepless speed regulation from zero to synchronous speed, and it is suitable for high-speed section fine-tuning and small and medium power speed regulation system. It is also used to adjust the torque by adjusting the current to ensure that the tension in the winding process remains constant.

The main feature of the slitter is that as a resistance device, the magnetic powder clutch outputs a DC voltage through system control to control the resistance produced by the magnetic powder clutch. The main advantage is that it is a passive device, which can control small tension.