Tension Control Affects The Quality Of The Product Produced

The true tension control is different from the system that forms the tension by the speed difference between the two power points. The essence of adjusting the tension by the speed difference is the PID control of the tension, and the tension sensor is added. Moreover, the adjustment of the start, stop, acceleration, deceleration, and parking of the large and small rolls is impossible to achieve the effect of true tension control, and the tension is not very stable. Tension control will definitely affect the quality of the product produced.

The essence of constant tension control with a frequency converter is the dead loop vector control, that is, the encoder feedback. For winding, the winding volume of the winding is changed from small to large. In order to ensure constant tension, the output torque of the motor is required to change from small to large. At the same time, in different operating processes, the corresponding torque compensation should be carried out. That is, when the small volume starts, accelerate, decelerate, stop, and when the large volume is started, different torque compensation is performed at different winding times, so that the whole process of winding is stable, and the tension is too large when the small volume is small. The phenomenon of loose yarn when the large roll starts.