Chapter 3 Adjustment Method; Quick Tuning; Restrictions On Quick Tuning; Precautions On Quick Tuning - Mitsubishi Electric MR-J5 User Manual

3
ADJUSTMENT METHOD
3.1

Quick tuning

To use quick tuning, set [Pr. PA08.0 Gain adjustment mode selection] to "5". Quick tuning performs gain adjustment for the
servo amplifier when servo-on is turned on. The characteristics of quick tuning are as follows:
• Has the ability to reduce the overshoot regardless of machine type or load size and is effective when reducing the
overshoot is prioritized over shortening the settling time.
• Adjustment available without the positioning operation

Restrictions on quick tuning

Quick tuning is not available in the following situations:
• During one-touch tuning
• In the torque mode
• In the continuous operation to torque control mode
• When using adaptive filter II

Precautions on quick tuning

• Do not use quick tuning in a tandem system or master-slave operation.
• Some noise due to the applied vibration torque may occur during quick tuning, but the noise is not an abnormality.
• When the load to motor inertia ratio is more than 100 times, quick tuning cannot adjust the gain appropriately. Adjust the
gain by using an alternative method such as auto tuning.
• When quick tuning is enabled (performed), the time until the servo amplifier actually enters the servo-on state after turning
on the servo-on command increases by up to 300 ms.
• When the torque limit value is less than 30 % of the rated torque, the torque required for quick tuning cannot be generated,
and quick tuning may fail. Set the torque limit value to exceed 30 % of the rated torque for quick tuning.
• If the travel distance for quick tuning exceeds the set value in [Pr. PA34 Quick tuning - Permissible travel distance], quick
tuning will be stopped.
• [Pr. PB11 Speed differential compensation] will be changed to the initial value if quick tuning is used.
• When friction is 30 % or more of the rated torque, quick tuning may fail. In this case, adjust the gain with one-touch tuning
or auto tuning.
3 ADJUSTMENT METHOD
14
3.1 Quick tuning