8. TROUBLESHOOTING
8 - 15
Alarm No.31
Name: Overspeed
Stop method: Corresponding axis stops
Alarm description
Servo motor speed exceeds the instantaneous permissible speed.
Display Name
Cause
Checkpoint
Finding
Action
31.1 Abnormal
motor
speed
(1) Permissible
rotation
speed or larger.
Review the operation
pattern.
The command from the
controller is excessive.
The command from the
controller is over the
permissible speed range. Within the permissible
rotation speed.
Check (2).
(2) Overshoot of speed
occurs as the motor starts
in the maximum torque.
Acceleration torque is
clamped to the maximum
torque.
Operating at
maximum torque.
Set acceleration time
longer or reduce the
load.
Operating
below
maximum torque.
Check (3).
(3) Servo system is instable
and causing oscillation.
Check for oscillation in
motor.
Oscillation is
occurring.
Execute auto tuning to
adjust the servo
system, or reduce the
load.
Oscillation is not
occurring.
Set acceleration time
constant longer.
Check
(4).
(4) Overshoot of velocity
waveform occurs.
Overshoot occurs.
Set acceleration time
constant longer.
Acceleration time
constant is too short
causing overshoot.
Overshoot does not
occur.
Check (5).
(5) Encoder is faulty.
Check if alarm occurs
when the actual speed is
lower than instantaneous
permissible speed.
Alarm occurs.
Replace the servo
motor.
Summary of Contents for MELSERVO-J3W Series
Page 17: ...8 MEMO ...
Page 27: ...1 FUNCTIONS AND CONFIGURATION 1 10 MEMO ...
Page 87: ...4 STARTUP 4 14 MEMO ...
Page 117: ...5 PARAMETERS 5 30 MEMO ...
Page 129: ...6 GENERAL GAIN ADJUSTMENT 6 12 MEMO ...
Page 185: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 241: ...11 OPTIONS AND AUXILIARY EQUIPMENT 11 56 MEMO ...
Page 274: ...13 USING A LINEAR SERVO MOTOR 13 25 1 2 3 4 ...