Drive Optimization using HMI Advanced
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
In the operating area Start-up of HMI Advanced, the following functions can be
chosen from the menu item Drives/Servo for analyzing speed and position con-
troller of a drive, as well as individual drive/servo data:
Frequency response measurement of speed control loop
Frequency response measurement of position control loop
A measurement of the torque control loop with HMI Advanced is not possible
within the framework of SINUMERIK 840Di.
The measuring functions make it possible to evaluate the most important speed
and position control loop quantities in the time and frequency range of a drive
without any external measuring instruments.
The integrated FFT analysis (Fast Fourier Transformation) provides a powerful
means to assess the control loop quality and, in addition, also to analyze the
given mechanical properties.
The FFT analysis should be used whenever:
– unsteady speed or position signal curves indicate problems with stability
– only long rise times can be obtained in the speed loop.
The circularity test serves to analyze the contour accuracy on the quadrant tran-
sitions of circular contours achieved by means of friction compensation (con-
ventional or neural quadrant error compensation).
/FB/, Description of Functions, Extended Functions
Section: Circularity test