The sizing machine is mainly used for yarn sizing, including traction and winding parts. The traditional sizing machine winding relies on the main motor to drive the pneumatic mechanical stepless speed regulator. The winding tension needs to be adjusted manually, and the speed regulator is also prone to wear, resulting in unstable tension, affecting the output and quality of weaving. Nowadays, variable frequency speed regulation technology is popularized. The introduction of the sizing machine electronic control system can ensure constant winding tension and improve system stability and product output quality. This article combines the FR500A inverter to introduce a constant tension winding control system that can improve equipment reliability and ease of operation.
The sizing machine is mainly composed of warp beam frame, sizing device, drying mechanism, locomotive head, etc. The warp beam frame is placed on the warp beam, the sizing device contains the sizing groove and other components to make the warp sizing, the drying mechanism dries the sizing yarn in a variety of ways, and the locomotive is responsible for winding the weaving shaft and maintaining constant tension. In addition, there are transmission and other parts to jointly ensure the stable operation of the machine and complete the sizing task.
The sizing machine is mainly composed of warp beam frame, sizing device, drying mechanism, locomotive head, etc. The warp beam frame is placed on the warp beam, the sizing device contains the sizing groove and other components to make the warp sizing, the drying mechanism dries the sizing yarn in a variety of ways, and the locomotive is responsible for winding the weaving shaft and maintaining constant tension. In addition, there are transmission and other parts to jointly ensure the stable operation of the machine and complete the sizing task.
The winding adopts the tension card open-loop torque control mode to achieve constant tension, without tension feedback, simplified structure and stable tension. According to the process setting tension and empty and full reel diameter, the tension card calculates the current reel diameter according to the line speed, and the torque is transmitted to the inverter control. When winding, the reel diameter is calculated in real time to keep the tension constant, and the tension taper setting is conducive to the curling and forming of the material.
The winding inverter adopts the closed-loop vector mode, and the tension is given by the analog potentiometer (analog input terminal AI1 of the winding inverter). The line speed is connected to AI2 (4-20mA) of the winding inverter through the AO1 analog output terminal of the traction inverter. During the operation of the system, the winding diameter is automatically calculated and the output torque is adjusted in real time according to the current line speed, operating frequency, tension, tension taper and other parameter settings to ensure the constant tension of the yarn during the winding process.
This article introduces a constant tension winding control system for sizing machines based on FR500A vector inverter. This solution can make the yarn tension very stable during the winding process, and can automatically and quickly adjust according to the changes in the front-stage traction speed and the tension during the winding process. The entire system runs stably and reliably, effectively improving product output and quality, and creating good economic benefits for the enterprise. It has been successfully applied to multiple sizing machine winding systems.
