Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 6

(3) Test run and adjustment
Before operation, check the parameter settings. Improper settings may cause some machines to operate
unexpectedly.
Never make a drastic adjustment or change to the parameter values as doing so will make the operation
unstable.
Do not get close to moving parts during the servo-on status.
(4) Usage
When it is assumed that a hazardous condition may occur due to a power failure or product malfunction,
use a servo motor with an external brake to prevent the condition.
Do not disassemble, repair, or modify the equipment.
Before resetting an alarm, make sure that the run signal of the servo amplifier is off in order to prevent a
sudden restart. Otherwise, it may cause an accident.
Use a noise filter, etc. to minimize the influence of electromagnetic interference. Electromagnetic
interference may be given to the electronic equipment used near the servo amplifier.
Burning or breaking a servo amplifier may cause a toxic gas. Do not burn or break it.
Use the servo amplifier with the specified servo motor.
The electromagnetic brake on the servo motor is designed to hold the motor shaft and should not be
used for ordinary braking.
For such reasons as service life and mechanical structure (e.g. where a ball screw and the servo motor
are coupled via a timing belt), the electromagnetic brake may not hold the motor shaft. To ensure safety,
install a stopper on the machine side.
(5) Corrective actions
Ensure safety by confirming the power off, etc. before performing corrective actions. Otherwise, it may
cause an accident.
When it is assumed that a hazardous condition may occur due to a power failure or product malfunction,
use a servo motor with an electromagnetic brake or external brake to prevent the condition.
Configure an electromagnetic brake circuit which is interlocked with an external emergency stop switch.
Contacts must be opened when ALM (Malfunction)
or MBR (Electromagnetic brake interlock) turns off.
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before
restarting operation.
Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.
CAUTION
CAUTION
CAUTION
Servo motor
RA
B
Electromagnetic brake
A - 5
www.kavrammuhendislik.com.tr
Contacts must be opened
with the emergency stop switch.
24 V DC