Limit Of Inertia Ratio - Delta ASD-A2-0121 Series User Manual

Chapter 5 Trial operation and Tuning

5.6.5 Limit of Inertia Ratio

Acceleration / Deceleration time of reaching 2000 r/min should be less than 1 second.
The speed in forward and reverse directions should be higher than 200 r/min.
The load inertia should be under 100 times of motor inertia.
The change of external force of inertia ratio cannot be too severe.
In auto mode, the inertia value will be saved to P1-37 every 30 minutes; while in semi-auto mode,
the inertia value will be saved to P1-37 only until the system inertia is stable and stops the
estimation of load inertia.
1. Decrease the value of P2-31 to reduce the
noise.
2. If not desire to decrease the value of P2-
31, value of P2-23 and P2-24 can be used to
suppress the resonance as well. (Please
refer to Chapter 5.6.6)
5-16
Servo off. Set P2-32 to 2. Then, Servo on again.
Set P0-02 to 15. The panel
displays inertia ratio*.
The servo drive issues the
command of alternative
acceleration/deceleration.
Yes
Any
resonance?
No
The inertia ratio shown on
the panel is stable.
Yes
Satisfactory
performance
?
Yes
If the value of inertia ratio
remains almost the same, then
servo off and set P2-32 to 0.
Yes
Tuning
completed.
No
Increase the value of P2-31
No
to increase response and
stiffness.
ASDA-A2