The rewinding and slitting machine is a paper processing equipment that cuts and rewinds wide web paper into rolls of varying widths and diameters. A machinery factory in Zhejiang mainly produces corrugated paper and box board paper. In daily production, this rewinding and slitting machine has two problems, including complex knife changing operations and long knife changing time; The cutting equipment is in poor condition and the cutting effect is unstable.

In order to further improve production reliability and product quality, Yingweiteng plans to upgrade the system scheme of the rewinder, optimize its production capacity and improve the cutting effect, in order to minimize the non production time of the rewinder and reduce manual operations.



01

Yingweiteng System Renovation Plan

Yingweiteng has proposed an economically efficient technological solution that meets all the requirements for improving capacity stability. Tailored solutions can seamlessly connect to existing production environments:

The driving layer of the system scheme mainly selects three GD350 series frequency converters, all of which use closed-loop vector, traction speed mode, winding AB torque mode, and unwinding tension controlled by PLC analog output proportional valve.

The start and stop of all three frequency converters are controlled by PLC output. 485 communication reads the current status of the three frequency converters and controls the torque of winding AB, and the analog output of traction (current speed) is given to the analog input of winding AB (torque mode speed limit). The entire system adopts a common DC bus mode, and the electricity generated by the slave can be returned to the host for use, reducing the waste of energy through energy consumption braking resistors. Considering shutdown and emergency stop, braking resistors are configured on the traction.

technological requirements



Control Block Diagram



GD350 series frequency converter



Integrating synchronous and asynchronous motor drive, open-loop and closed-loop control, all wheel drive and all-around capability

By adopting a new vector control algorithm, the robustness of motor parameters is improved, without the need for complex parameter tuning, and the high-speed stability of motor control is improved

Strong scalability, capable of selecting up to 3 different types of expansion cards simultaneously

The standard LCD keyboard greatly improves usability and supports uploading and downloading three sets of inverter parameters

Models below 110kW can achieve built-in braking units, while models between 18.5-110kW have built-in DC reactors

Standard safety torque stop (STO) function

02

Significant advantages after renovation



High precision and efficiency

The speed of the host and slave machines is synchronized through analog speed limits, ensuring dynamic response during acceleration and deceleration. Communication controls the winding torque, avoiding zero drift problems in analog control and eliminating tension sensors. This can more accurately complete cutting tasks, improve product yield, shorten production cycles, and meet rapid market demand.

Energy conservation and environmental protection

GD350 adopts a common DC bus method to reduce energy waste through energy consumption braking resistors, thereby reducing energy consumption and costs.

Customized services

Yingweiteng can follow the diversification of market demand, provide customized equipment and solutions according to the specific needs of manufacturers, and meet the special needs of users.

The integrated features and ease of use of the Envision GD350 provide users with an excellent user experience, optimize the functions of the production line for the modernization of the rewinder, and ultimately achieve increased production and efficiency.

The equipment in the printing and packaging industry is gradually achieving comprehensive digital control. Yingweiteng's high-performance products and automation control system solutions can achieve precise monitoring and control of the entire production process, improve the stability and efficiency of equipment operation, and help existing production lines operate faster.