Yaskawa SGDB - Manual (Page 212)

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4 . 2 Using the Functions
201
4.2.3 Autotuning
No experience required to achieve optimum settings.
The SERVOPACK contains a built-in autotuning function to automatically measure the ma-
chine characteristics and set the parameters.
Servo drives normally require tuning to match the machine configuration and rigidity. This
tuning requires a great deal of experience and is difficult for a person unfamiliar with the tun-
ing procedure.
However, autotuning allows even totally inexperienced people to easily complete the tuning.
Autotuning
Automatically measures the
machine characteristics and
sets the parameters.
Load Inertia
Friction SGDB
SGMj
J Precautions Relating to Autotuning
Speed Setting During Autotuning
The motor speed during autotuning is set by parameter Cn-10. Set to 500 min
−1 ., which is
the factory setting. Autotuning may be unsuccessful if this value is set too low.
The motor runs intermittently while the or (or
UP
or
DOWN
) key is held down. The
motor does not rotate continuously.
Machine Rigidity Selection
Select the machine rigidity as described below. If the actual rigidity is unknown, select
medium rigidity.
High Rigidity
Medium Rigidity
Low Rigidity
• If the Machine Resonates
At servo ON when the
JOG
SVON
(or
DATA
) key is pressed or when the motor is operated by
pressing the or (
DOWN
or
UP
) key, machine resonance indicates an inap-
propriate machine rigidity setting.
Follow the procedure below to correct the machine rigidity setting, and run autotuning
once more.
4