Chapter 1 Adjustment Function Types; Adjustment Functions Available When Using The Servo Amplifier Alone; Functions To Automatically Adjust Machine Stability - Mitsubishi Electric MR-J5 User Manual

1
ADJUSTMENT FUNCTION TYPES
A servo amplifier is equipped with various servo parameters that can be used to adjust operation status. To maximize the
machine's performance, these servo parameters must be set in accordance with the machine's characteristics. When using
the factory setting, the gain adjustment is set to "Auto tuning mode 1". Use each adjustment function to improve the
responsiveness.
Precautions
• When using torque mode, gain adjustment is not required.
• Before performing gain adjustment, check that your machine is not being operated at the maximum torque of the servo
motor. If operated in excess of the maximum torque, the machine may vibrate and operate unexpectedly. In addition, adjust
gains taking into account that each machine is different. It is recommended to limit the torque generated by the servo motor
during operation to 90 % or less of the maximum torque of the servo motor.
• If the torque of the servo motor reaches the torque limit value, changing the gain will not change the response of the servo
motor and gain adjustment cannot be performed accurately.
• When using a linear servo motor, the terms below have the following meanings.
Load to motor inertia ratio → Load to motor mass ratio
Torque → Thrust
1.1
Adjustment functions available when using the
servo amplifier alone
The following table shows the adjustment functions available when using the servo amplifier alone.

Functions to automatically adjust machine stability

Adjustment function
Quick tuning
Auto tuning mode 1
Auto tuning mode 2
2 gain adjustment mode 1
2 gain adjustment mode 2
1 ADJUSTMENT FUNCTION TYPES
8

1.1 Adjustment functions available when using the servo amplifier alone

Outline
Use this function to prioritize reduction of the overshoot rather than shortening the settling time. An
adjustment is enabled without the positioning operation.
Use this function to adjust the machine while checking the response waveform when the load to motor
inertia ratio of the device is unknown. Also use this function when the load to motor inertia ratio of a
machine varies during operation.
Use this function to adjust the machine while checking the response waveform when the load to motor
inertia ratio of the device is known.
Use this function for auto tuning a machine that requires path accuracy improvement, such as an XY table
or a tandem mechanism, and to suppress inter-axis interference.
Use this function to adjust settling time and overshoot amount after one-touch tuning.
Reference
Page 14
Quick tuning
Page 42 Auto
tuning mode 1
Page 47 Auto
tuning mode 2
Page 49 2
gain adjustment
mode 1
Page 51 2
gain adjustment
mode 2