Speed control (optional with closed-loop speed control)

The coil rotates and accelerates with a constant circumferential speed and circumferential acceleration. Input speed and input acceleration are influenced by the current diameter. This means the setpoints are reduced with increasing diameter and increased with reduced diameter.

To enhance the accuracy of path speed, deviations from setpoints that are detected with a measuring wheel can be minimized by means of closed-loop speed control. This closed-loop speed control is carried out with a PID controller. Deviations from setpoints can arise due to inaccuracies in the diameter acquisition, for example.