YASKAWA SGD7S-R70A20A023F40B Product Manual page 69

 Gain Adjustment Flowchart
A gain adjustment flowchart for pressure feedback control 2 is provided below.
Adjust Pn45E to a suitable value.
Torque saturation occurs.
Start of Adjustment
Execute advanced autotuning to estimate the
speed loop gain (Pn100), speed loop integral
time constant (Pn101), and moment of inertia
ratio (Pn103).
Enter the value of Pn100 for Pn4A7 (Pressure
Feedback Control 2 Stability Gain).
Enter the value of Pn101 for Pn4A8 (Pressure
Feedback Control 2 Integral Time).
Enter the value of Pn103 for Pn4AC (Pressure
Feedback Moment of Inertia Ratio).*
*If the output differs greatly between pressing and
non-pressing states, set Pn4AC to the following
value: Pn103 × 1/Output ratio at end of machine2.
Enter the pressure reference.
Set Pn45E (Pressure Feedback Reference Filter
Time Constant) to the desired settling time.
Increase the value of Pn4A0
(Pressure Feedback One-parameter Gain Level).
No vibration
Check the response
waveform.
Vibration or overshooting
Increase Pn4A7 and decrease Pn4A8.
Check the response
waveform.
No vibration
Check the response
waveform.
End of Adjustment
Vibration
Target reference not followed.
3.6 Setup Procedure
3.6.7 Gain Adjustment
3-19
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