MTS Systems FlexTest SE Service Information

About Tuning
Model 493.02 Controller Service
Tuning
195
What to do first The following are tasks that should be completed before you tune. It is
not necessary to perform every task each time you tune. The condition
of your system dictates which of the following tasks you must perform.
For example, a new system or a system under complete recalibration
requires all of the following to be completed. If you are performing
periodic or fine-tuning, review the following and determine which
tasks you need to complete.
• Connect an oscilloscope to your system or use the controller
scope. You need to monitor the sensor signal or error signal for
the control mode you intend to tune. Go to “Monitoring
Waveforms” on page 211 for help.
• Balance the servovalve. The electrical valve balance adjustment
compensates for minor mechanical imbalance—it is an
intermediate adjustment. Go to “Adjusting Valve Balance” on page
75 and perform the electrical valve balance adjustment procedure.
• Calibrate each sensor used for a control mode or data acquisition.
Perform the appropriate calibration procedure.
• If your sensor calibration schedule does not require calibration at
this time, perform a shunt calibration check to determine if your
DC sensor/DC conditioner is within tolerance. See “Shunt
Calibration” on page 89.
• If you have a three-stage (Series 256 or 257) servovalve, tune the
inner loop (gain and rate) before tuning the outer loop. The rules
for inner loop tuning are similar to those of the outer loop. Go to
“Tuning the Inner loop” on page 77 for help.
Getting started When you set out to tune your system, it is best to run auto-tuning
first. Auto-tuning establishes reasonable tuning levels that will be
adequate for most control modes. See “Auto tuning” on page 217 for
more information
If the results from auto-tuning are not satisfactory, you should create a
tuning function, and then manually tune each control mode.
Automated
procedures
The “Automated” paths and procedures described in this manual
assume the FlexTest SE Controller is equipped with the PC-Supervision
option, and that Exclusive Control is assigned to Station Manager. For
more information about Station Manager, see the Model 793.00 System
Software manual that accompanies your system.

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English