MTS Acumen - Manual (Page 176)

If the loop is over-tuned, that is, responds in an over-responsive or unstable manner (also referred to
as “tuned hot”), the indicator will be positioned to the right in the red zone. In the scope graph, the
feedback line (red) will over-respond to the command line (blue):
Over-Tuned Loop
Note:
The indicator in the tuning quality graph becomes a slider control when verification is complete.
Important:
There is an interrelation between control modes when tuning. When you adjust the tuning values
of one control mode, the other tuned control modes are affected. After auto tuning, it is best
practice to adjust only the tuning values of the control mode you intend to use (active control
mode). For dual-mode use, adjust and verify the tuning values of both modes iteratively until you
obtain satisfactory results.
9. If desired, drag the slider control to modify the tuning set and change the responsiveness of the system.
a) Drag the slider controls in the inner and outer-loop tuning quality graphs as desired for the selected
control mode.
b) Click the green run button. As the application attempts to achieve the desired performance, the
slider control in the tuning quality graph shows both the original and desired slider positions.
c) When the tuning adjustment program is complete, the slider will change position in the tuning quality
graph to indicate actual performance.
d) Click Done to save the modified tuning values.
e) Repeat for displacement and force control modes.
Adjust Tuning (Basic)
In this procedure, you will adjust master tuning controls while applying program command and observing
the system response.
Important:
There is an interrelation between control modes when tuning. When you adjust the tuning values
of one control mode, the other tuned control modes are affected. After auto tuning, it is best practice
176 | MTS Acumen ™
Best Practices for Other System Configurations and Tests