MTS Series 793 - Manual (Page 88)

MTS Series 793 Tuning and Calibration
How to Perform Advanced Tuning Techniques
Tuning Procedures 88
How to Perform Advanced Tuning Techniques
The following techniques require product features that may be optional for your
controller.
How to Auto-Tune
When you run auto-tuning, the controller disregards your current PIDF gain
settings
and applies the minimum required drive signal to ramp the feedback to
80% of the auto-tuning limits. It then measures the relationship between the
feedback velocity and the valve opening signal and then derives the minimum
PIDF gains required to track the command. It’s good practice to auto-tune the
displacement control mode first, then install a dummy specimen and auto-tune
the force control mode.
Auto-tuning the
displacement control
mode
1. Select an access level of Tuning.
Standalone FlexTest SE Controllers: Status > Access Level > Tuning
Automated Controllers: In the Station Manager window’s toolbar, select
an access level of Tuning.
2. If necessary, remove the specimen.
3. Set and enable the displacement feedback signal’s limits (typically just
outside the signal’s full-scale range).
Standalone FlexTest SE Controllers: Setup > displacement > Limits
Automated Controllers: In the Station Setup window’s navigation pane,
click Detectors and then Limits.
See “How to Set Limit Detectors” in the MTS Series 793 Control Software
manual for more about setting limit detectors.
4. Set up auto-tuning parameters.
Standalone FlexTest SE Controllers:
A. Select Tuning > Auto-Tuning.
B. For Control Mode, select displacement.
C. For Mode to Tune, select displacement.