Printing And Packaging And Lithium Battery Industry - Slitting Machine Application Case
Publish Time: 2025-04-25
System solution:
■ Slitting machine is a mechanical equipment that cuts wide paper or film into multiple narrow materials. It is often used in papermaking machinery and printing and packaging machinery. Its transmission system is mainly composed of a host inverter, a rewinding inverter and two rewinding inverters. The host inverter works in open-loop vector mode to control the system speed. The unwinding inverter and the two rewinding inverters work in open-loop torque mode to control the system unwinding and the upper and lower rewinding after slitting, as shown in the figure.
Solution description:
■ The host inverter uses the general inverter MD330 to control the running speed of the slitting machine. It works in open-loop vector mode. The main speed is generally adjusted by a potentiometer. Its AO1 port is used as the output of the running frequency as the given linear speed of the unwinding inverter and the upper and lower rewinding inverters. The unwinding inverter and the rewinding inverter use the MD330 tension-specific inverter. These three inverters all work in open-loop torque mode.
■ MD330 inverter is an inverter that can realize constant tension control. It can obtain the real-time roll diameter of the material roll through the calculation inside the inverter, and obtain constant tension control by controlling the output torque of the inverter.
Solution advantages:
■ The solution is simple and easy to debug. In addition, the constant tension control is basically not affected by the speed, and high-speed slitting can be achieved.
■ By setting reasonable system inertia compensation, friction compensation and material inertia compensation related parameters, the speed unevenness during the start-up or acceleration caused by system inertia, friction resistance and material inertia can be compensated, and a very stable tension control effect can be obtained. In addition, the winding inverter can realize taper control to achieve the effect of tight winding.
■ It overcomes the inherent weaknesses of magnetic powder, making high-speed slitting control a reality and greatly improving the reliability of the equipment.
