Frequency Response Measurement; Measurement Of Torque Control Loop - Siemens SINUMERIK FM-NC Installation And Startup Manual

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10.5

Frequency response measurement

10.5.1

Measurement of torque control loop

Functionality
The torque control loop need only be measured for diagnostic purposes in the
event of an error or in cases where no standard data are available for the motor/
power section combination used, resulting in unsatisfactory speed controller
frequency responses.
Note
The user must take special safety precautions before measuring the torque
control loop for vertical axes that have no external weight compensation (drive
must be securely clamped).
Procedure
1. Set the traversing range monitoring function and enabling logic in the basic
2. Set the necessary parameters in the measuring parameter display
3. Display the results of the measurement on the screen with softkey Display
Fig. 10-1
Measurement
Amplitude
parameter This parameter determines the magnitude of the test signal amplitude (unit:
peak torque specified in %). Values between 1% and 5% are suitable.
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SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
display.
Display diagram: Example of current control loop
10 Drive Optimization with Start-Up Tool

10.5 Frequency response measurement

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