MTS Acumen - Manual (Page 93)

For more information, see Compensate for Fixturing (p. 158). To see how this feature is used when running
the example test, see Create a Compensation Set .
About Tuning
Tuning refers to the process of adjusting your test system so that system performance matches specimen
characteristics. When you tune, you are setting the response and stability of the servo control loop.
While precise tuning is not usually necessary, inaccurate tuning increases the error and phase lag between
command and feedback. If the error is large, it can reduce control accuracy and repeatability, and prevent
the full program command from being applied to the specimen.
It is important to understand the following:
• Improper tuning, especially for the force control mode, may cause the system to become unstable.
• MTS TestSuite software offers several tuning levels, but in most situations auto tuning and verification
is adequate.
• Tuning must be performed whenever you test a specimen that has different performance characteristics.
For more information, see Tune for Specimen (p. 168). To see how this feature is used when running the
example test, see Tune the System .
Understanding and Resolving Error Conditions
Resolving error conditions is a normal part of operating an MTS Acumen System. You typically identify
and resolve several error conditions during setup and testing.
Error List and Application Log in MPX
Example
When you open a Station Configuration (either by selecting it using the Station Manager application or by
clicking a station desktop shortcut), the Station Configuration opens in an interlocked state by design. To
help you identify this error condition, the system lights the Interlock indicator in the main window, and also
writes a “Software Interlock” entry into the Message Log. To resolve this condition, you simply press the
Interlock Reset control on the System panel in the main window.
Using Application Logs to Identify Error Conditions
Both the Station Manager and TestSuite MPX applications are equipped with logs to help you identify error
conditions. These logs are your window into the state of the system for the source of error conditions. Each
log entry is categorized with key words such as “Warning” and “Error” to inform you if intervention is
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Key Concepts