MELSERVO-J4

Maintenance Function Harmony with Man

This function detects changes of mechanical drive components (ball screw, guide, bearing, belt, etc.) by analyzing machine friction, load moment of inertia, unbalanced torque, and changes in vibration component from the data inside the servo amplifier, supporting timely maintenance of the mechanical drive components. Machine Diagnosis Function

Patented

[Machine diagnosis function window on MR Configurator2]

Friction and vibration are estimated based on the data in a normal operation. Particular measurement is not required.

Servo amplifier

Encoder

Ball screw

Servo motor

Estimated friction value is displayed.

Estimated vibration value is displayed.

MR-J4 series displays the alarm No. in three digits to show the servo alarm in more details, making troubleshooting easy. Three-digit Alarm [Three-digit alarm display]

Patent pending MR-J4-GF detects aging-related changes in a machine performance based on the frictions and vibrations monitored by the machine diagnosis function, and informs the maintenance time with a warning. MR-J4-GF also stores the total travel distance of the servo motor and informs the maintenance time with a warning when the total travel distance exceeds the warning limit set by you. When the limit is set to the rated life of a ball screw or bearing, preventive maintenance can be executed according to the actual machine operation. Failure Prediction Function GF-RJ GF

MR-J4-GF

This display is of MR-J4-A.

Failure prediction warning based on friction, vibration, and total travel distance.

[Example of an alarm window on MR Configurator2]

Normal operation

Servo motor

Failure

The failure warning limit is created automatically from the estimated frictions.

Machine failure

Sign of failure

Kinetic friction

Failure warning limit

Failure warning

Time

Total travel distance of servo motor

Component life

Set the failure warning limit based on the rated life.

For the undervoltage alarm, whether the alarm occurred in the main or the control circuit is identified by the alarm No.

Informing maintenance time

Failure warning limit

Failure warning

Time

26