ElmoMC SimplIQ Digital Servo Drives-Bell Getting Started - Manual (Page 39)

The SimplIQ for Steppers Getting Started & Tuning and Commissioning Guide
MAN-BELGS (Ver. 1.1)
39
The method for finding the transfer function is simple: inject sine signals of
varying frequency to the plant and measure the resulting motion. The
implementation of this method by the Conductor, however, is quite complex.
The transfer function of motion systems depends on the signal amplitude and the
working conditions. You can log differing transfer functions, identified with
different working conditions, and then use them all in a combined design process
to generate a controller that fits them all.
For quick identification, select the Identify tool.
The following window opens:
Figure 39: Identification window
Click Run, answer Yes to confirm the change of control parameters, and wait
until completion. The noises you hear are the frequencies that run through your
plant.
You will receive an identification result with a frequency response plot: