Mechanical Analysis Window - YASKAWA XTRAWARE - V3.0 Manual

2. Click OK to open the Mechanical Analysis window (Figure 30).
4.8.1.

Mechanical Analysis Window

Figure 30: Mechanical Analysis Window
Accurate measurement of the frequency characteristics depends on the
settings of the following parameters:
♦ Sampling Time [μsec] (Measurement Frequency [Hz], Excitation Time
[ms])
If the sampling time is shortened, a higher frequency can be measured
and the excitation time is shortened. However, frequency resolution
deteriorates and measurement accuracy is reduced at low measuring
frequency. The measuring frequency and excitation time depend on the
sampling time. To begin with, set the sampling time to a small value.
Then reset it to a more appropriate value in accordance with the results
produced.
♦ Excitation Amplitude [±%/Rated torque] Range: 1 to 300%
Must be set to a value below the Torque Limit.
Select the size of the reference amplitude applying excitation to the
machine as a percentage of the ratio of size to rated torque.
A larger excitation amplitude tends to give more correct measurements,
but an excessively large amplitude can cause overspeed (A.51) and
overcurrent (A.10) alarms. Problems with the load inertia and the
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