12/2008 2 Maschine information
2.2 Variable monitors - Measurements and measurement series
© Siemens AG 2008 All Rights Reserved
ePS Network Services, Function Manual (FH) - Release 12/2008
2-45
For axes that also have a direct measuring system the overall rigidity curve over
the axis position is also displayed. The rigidity is determined independently of the
direction. The following rigidity characteristics are calculated:
Characteristic Meaning
Maximum rigidity The characteristic returns the maximum rigidity
value via the rigidity characteristic in the measured
position range at the configured speed.
Minimum rigidity The characteristic returns the minimum rigidity value
via the rigidity characteristic in the measured
position range at the configured speed.
Average rigidity For calculating the characteristic, the mean rigidity
value is determined in the measured position range
at the configured speed.
Standard deviation of the
rigidity
For calculating the characteristic, the standard
deviation of the rigidity is determined in the
measured position range at the configured speed.
The equability test notifies the machine operator of faults and interference
resistances from feed axis elements. The curve of the recorded values indicates at
which axis position the disturbance is located. A trend analysis of the
characteristics will indicate any change in the status of the drive train.
Fig. 2-25: Measurement results of an equability test
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