Basic principles

The drive system receives the input parameter "Speed n = 40 rpm" from the PLC. If the drive system is operating under optimum conditions, the motor achieves this speed with very good control quality. The different characteristics of the drive system also cause sources of resonance among other things, which are always disturbing. They often manifest themselves in oscillating shafts or hum frequencies. Overlaid signal oscillations of the encoder systems can similarly create high frequency noise, thus reducing the control quality.

The following test provides information about possibly existing interference frequencies: Drive through the necessary operating speed range and make a scope recording of the actual active current (IDN S-0-0084). On the basis of the curve of the graph you can judge whether or not there are points of interference.