Oscillation Detection - Mitsubishi Electric MELSERVO-JE Instruction Manual

1. SERVO AMPLIFIER TROUBLESHOOTING
Alarm No.: 52 Name: Error excessive
Alarm content
Detail
Detail name
No.
52.1 Excess droop (12) Servo motor shaft was
pulse 1
(13) The encoder or the
(14) The servo amplifier is
52.3 Excess droop Check it with the check method for [AL. 52.1].
pulse 2
52.4 Error excessive (1) The torque limit value
during 0 torque
limit
52.5 Excess droop Check it with the check method for [AL. 52.1].
pulse 3
Alarm No.: 54 Name: Oscillation detection
Alarm content
Detail
Detail name
No.
54.1 Oscillation (1) The servo system is
detection error
(2) The resonance
(3) An encoder is
Droop pulses have exceeded the alarm occurrence level.
Cause
Measure the actual
rotated by external position under the
force. servo-lock status.
Replace the servo
servo motor is motor, and then check
malfunctioning. the repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Check the torque limit
is 0. value.
An oscillation of the servo motor was detected.
Cause
Check if the servo
unstable and motor is oscillating.
oscillating. Check the torque
ripple with MR
Configurator2.
Measure the
frequency has changed resonance frequency
due to deterioration. of the equipment, and
compare it with the
setting value of the
machine resonance
suppression filter.
Replace the servo
malfunctioning. motor, and then check
the repeatability.
Check method Check result
It is rotated by
external force.
It is not rotated by
external force.
It is not repeatable.
It is repeatable.
It is not repeatable.
The torque limit
value is 0.
Check method Check result
The torque ripple is
vibrating.
The torque ripple is
not vibrating.
The resonance
frequency of the
equipment is
different from the
filter setting value.
The resonance
frequency of the
equipment is the
same as the filter
setting value.
It is not repeatable.
1 - 36
Action Target
Review the [A]
machine. [B]
[C]
Check (13).
Replace the servo
motor.
Check (14).
Replace the servo
amplifier.
Do not input a [A]
command while the [B]
torque limit value is [C]
0.
Action Target
Adjust the servo [A]
gain with the auto [B]
tuning. Set the [C]
machine resonance
suppression filter.
Check (2).
Change the setting
value of the
machine resonance
suppression filter.
Check (3).
Replace the servo
motor.