Vibration Failure Prediction Function - Mitsubishi Electric MELSERVO-J5 Series User Manual

Vibration failure prediction function

The vibration failure prediction function predicts device failure based on the vibration level that has been estimated with the
friction vibration estimation function during servo motor operation.
Precautions
• When the vibration failure prediction function is enabled, a vibration failure warning may occur if the gains of the servo
amplifier are changed. Enable the vibration failure prediction function after the gains of the servo amplifier are adjusted.
• To create a vibration level threshold with the automatic threshold setting in the vibration failure prediction function, the
equipment must be operated for three consecutive hours or longer, and be in the position or velocity mode for a cumulative
time of 90 hours or longer.
Setting method [G] [WG]
The vibration prediction function predicts a failure of the equipment with the increase of the vibration level, which is estimated
by the vibration estimation function. If a failure of the equipment is predicted from the vibration, [AL. 0F7.1 Vibration failure
prediction warning] occurs. Set the vibration failure prediction function in the following order:
Set [Pr. PF34.1 Vibration failure prediction warning selection] to "2"
(Manual threshold setting).
Drive the servo motor.
The vibration level and vibration frequency are estimated.
Save the estimated vibration level and vibration frequency.
Set a threshold with the following servo parameters.
[Pr. PF45 Vibration failure prediction - Average characteristics]
[Pr. PF46 Vibration failure prediction - Standard deviation]
[Pr. PF40.1 Vibration failure prediction - Threshold multiplication]
*1 If the equipment is operated continuously for less than 3 hours, and operated in the position mode or velocity mode for a cumulative time
of less than 90 hours, a threshold is not calculated automatically.
*2 The data of the estimated vibration level and vibration frequency can be saved on the machine diagnosis screen of MR Configurator2.
4 APPLICABLE FUNCTIONS
200
4.5 Machine diagnosis
Startup the system.
Threshold setting method?
Manual threshold setting
* 2
Vibration failure prediction is performed.
If the vibration level during servo motor operation exceeds the threshold,
[AL. 07F.1 Vibration failure prediction warning] will occur.
Start
Automatic threshold setting
Set [Pr. PF34.1 Vibration failure prediction warning selection] to "1"
(Automatic threshold setting).
Drive the servo motor.
The vibration level and vibration frequency are estimated.
Save the estimated vibration level and vibration frequency.
The threshold is automatically calculated.
The settings of [Pr. PF45 Vibration failure prediction - Average characteristics]
and [Pr. PF46 Vibration failure prediction - Standard deviation] are changed
based on the estimated vibration level.
Has a threshold been created?
[Pr. PF34.1 Vibration failure prediction warning selection] is set to
"2" (Manual threshold setting).
End
* 2
* 1
NO
YES