Torque Control

In torque control, the torque of the drive of the unwinder or winder is regulated. Using torque control for tensile force regulation appears to be a suitable method with today's drive technology, but it comes with certain limitations. Since the circumference of the spool changes during winding or unwinding, maintaining constant torque results in changes to the wire's tension.

Torque control can be used for slight changes in circumference or within permissible tensile force tolerances, especially for high tensile strengths. Additionally, torque can be adjusted according to the spool's circumference. This requires a measurement and control device that continuously determines the circumference and adjusts the torque accordingly.

However, torque-based tensile force control is complicated by acceleration processes. Therefore, torque control is less suitable for very precise tension requirements or very small forces.

The main disadvantage of torque control compared to dancer position control is that any deviation in the drive motor immediately affects the tension. Moreover, torque control lacks buffering against external disturbances.