Specifications

Cautions Concerning Use
29
take measures on the machine side to ensure that oil from
the gear box does not get into the motor.
• Do not touch the servo motor and so on, while the servo
motor is turned ON or for a while after the power has been
shutoff. The motor could be very hot, and touching it could
burn skin.
• The optional regeneration unit becomes hot (temperature
rise of 100°C(212°F) or more) with frequent use. Do not
install within flammable objects or objects subject to thermal
deformation. Take care to ensure that electric wires do not
come into contact with the main unit.
• Carefully consider the cable clamping method, and make
sure that bending stress and the stress of the cable’s own
weight are not applied on the cable connection section.
• If using in an application where the servo motor moves,
select the cable bending radius according to the required
bending life and wire type.
Grounding
• Securely ground to prevent electric shocks and to stabilize
the potential in the control circuit.
• To ground the servo motor and servo amplifier at one point,
connect the grounding terminal from each unit, and ground
from the servo amplifier side.
• Faults such as a deviation in position could occur if the
grounding is insufficient.
Wiring
• When a commercial power supply is applied to the amplifi-
er’s output terminal (U, V, W), the amplifier will be damaged.
Before switching the power on, perform thorough wiring
and sequence checks to ensure that there are no wiring
errors, etc.
• When a commercial power supply is applied to the motor’s
input terminal (U, V, W), the motor will be burned out.
Connect the motor to the amplifier’s output terminal (U, V,
W).
• Match the phase of the motor’s input terminal (U, V, W) to
the amplifier’s output terminal (U, V, W) before connecting.
If they are not the same, the motor control cannot be per-
formed.
• Validate the stroke end signals (LSP, LSN) in the position con-
trol or speed control mode.
The motor will not start if the signals are invalid.
Factory settings
• All available motor and amplifier combinations are predeter-
mined. Confirm the model of the motor and amplifier to be
used before installation.
• For the MR-J3-A type, use the parameter No.A01 for the con-
trol mode to set position, speed and torque.
The default value is set to position, so when using the speed
operation, change the setting value.
• When using the optional regeneration unit, please change
the parameter No.A02 (for MR-J3-A type). The optional
regeneration unit is disabled as the default, so the parameter
must be changed to increase the regeneration performance.
To ensure safe use
• To ensure the safe and proper use of the product, we ask
that you read the instruction manual and “MR-J3 INSTRUC-
TION MANUAL” prior to its use.
• These products are not designed or manufactured for use in
machinery and systems where people’s safety is at stake.
• When considering the product for use in such special appli-
cations as equipment or systems employed in passenger
transportation, medicine, aerospace, nuclear power genera-
tion, or underwater relays, please contact our sales repre-
sentative.
• These products have been manufactured to the most rigor-
ous quality standards. However, we ask that you employ
safety devices when using the product in equipment in
which any failure on its part can be expected to cause a seri-
ous accident or loss.
Cautions concerning use
Transport and installation of motor
• Protect the motor or encoder from impact during handling.
When installing a pulley or coupling, do not hammer on the
shaft. Impact can damage the encoder. In the case of motor
with key, install a pulley or coupling with the screw of shaft-
end. Use a pulley extractor when taking off the pulley.
• Do not apply a load exceeding the tolerable load onto the
servo motor shaft. The shaft could break.
Installation
• Avoid installation in an environment in which oil mist, dust,
etc. are in the air. When using in such an environment,
enclose the servo amplifier in an sealed panel. Protect the
motor by furnishing a cover for it or taking similar measures.
• Mount the amplifier vertically on a wall.
• When installing several amplifiers in a row in a sealed panel,
leave 10mm(0.39inch) or more open between each amplifi-
er. The amplifiers can be mounted closely. In this case, keep
the ambient temperature within 0 to 45°C (32 to 113°F), or
use them with the effective load rate of 75% or less.
When using one amplifier, always leave 40mm(1.57inch) or
more open in the upward direction and 40mm(1.57inch) or
more open in the downward direction.
To ensure the life and reliability, keep space as open as pos-
sible toward the top plate so that heat does not build up.
Take special care, especially when installing several ampli-
fiers in a row.
• For installing a single motor, the motor can be installed hor-
izontally or vertically. When installing vertically (shaft-up),
10mm
(0.39inch)
or more
100mm
(3.94inch)
or more
40mm
(1.57inch)
or more