2
Operation
y
Do not touch the rotating parts (output shaft) of the motor during
operation. Doing so may cause injury.
y
Provide an emergency stop device or emergency stop circuit external to
the equipment so that the entire equipment will operate safely in the event
of a system failure or malfunction. Failure to do so may result in injury.
y
The motor surface temperature may exceed 70 °C
(158 °F), even under normal operating conditions. If the
operator is allowed to approach the motor in operation,
affix a warning label shown in the figure on a conspicuous
position. Failure to do so may result in skin burn(s).
Warning label
y
For the power supply input to the electromagnetic brake, use a DC power
supply with reinforced insulation on the primary side. Failure to do so may
result in electric shock.
Maintenance and inspection
y
Do not touch the terminals while conducting the insulation resistance
measurement or dielectric strength test. Doing so may cause electric shock.
Precautions for use
This chapter covers restrictions and requirements the user should consider
when using the product.
•
Always use the accessory cable to connect the motor and driver.
•
When conducting the insulation resistance measurement or
the dielectric strength test, be sure to separate the connection
between the motor and the driver.
Conducting the insulation resistance measurement or dielectric strength test
with the motor and driver connected may result in damage to the product.
•
Double shaft motor
Do not apply load torque, radial load, or axial load to the output shaft on the
opposite side of the motor output shaft.
•
Do not apply a radial load and axial load in excess of the
specified permissible limit.
Operating the motor under an excessive radial load and axial load may
damage the motor bearings (ball bearings). Be sure to operate the motor
within the specified permissible limit of radial load and axial load. See page 5
for details.
•
Use the motor in conditions where its surface temperature will
not exceed 100 °C (212 °F).
The motor does not have a function to protect from overheating. The motor
surface temperature may exceed 100 °C (212 °F) under certain conditions
(ambient temperature, operating speed, duty cycle, etc.). To prevent the
motor bearings (ball bearings) from reaching its usable life quickly, use the
motor in conditions where the surface temperature will not exceed 100 °C
(212 °F).
Use the geared motor in a condition where the gear case temperature does
not exceed 70 °C (158 °F), in order to prevent deterioration of grease and
parts in the gear case.
If the motor is to be operated continuously, install the motor in a location
where heat dissipation capacity equivalent to a level achieved with a heat
sink [made of aluminum, 250×250×6 mm (9.84×9.84×0.24 in.)] is ensured.
•
Holding torque at standstill
The motor holding torque is reduced by the current cutback function of the
driver at motor standstill. When selecting a motor, check the holding torque
at motor standstill in the specifications on the catalog.
•
Do not use the electromagnetic brake for braking or as a safety
brake.
Do not use the electromagnetic brake as a means to decelerate and stop the
motor. The brake hub of the electromagnetic brake will wear significantly
and the braking force will drop. The electromagnetic brake is of power-off
activated type. This means that although it helps maintain the position of the
load in the event of power outage, etc., this brake cannot securely hold the
load in place. Accordingly, do not use the electromagnetic brake as a safety
brake. To use the electromagnetic brake to hold the load in place, do so after
the motor has stopped.
•
Preventing electrical noise
See USER MANUAL for measures with regard to noise.
•
Peak torque of geared motor
Always operate the geared motor under a load not exceeding the peak
torque. If the load exceeds the peak torque, the gear part will be damaged.
•
Rotation direction of the gear output shaft
The relationship between the rotation direction of the motor shaft and that
of the gear output shaft changes as follows, depending on the gear type and
gear ratio.
Type of gear
Gear ratio
Rotation direction (relative to the
motor rotation direction)
TH
geared
3.6, 7.2, 10
Same direction
20, 30
Opposite direction
FC
geared,
PL
geared
PS
geared,
PN
geared
All gear ratios
Same direction
Harmonic geared
All gear ratios
Opposite direction
The rotation direction of the motor output shaft indicates as viewed from the
output shaft side.
CW
CCW
Rotation direction of the
standard type
•
Do not perform push-motion operation with geared motor.
Doing so may result in damage to the motor or gear part.
•
About grease of geared motor
On rare occasions, a small amount of grease may ooze out from the geared
motor. If there is concern over possible environmental damage resulting from
the leakage of grease, check for grease stains during regular inspections.
Alternatively, install an oil pan or other device to prevent leakage from
causing further damage. Oil leakage may lead to problems in the customer’s
equipment or products.
Notes when the connection cable is used
Note the following points when an accessory cable is used.
•
When inserting the connector
Hold the connector main body, and insert it in straight securely.
Inserting the connector in a inclined state may result in damage to terminals
or a connection failure.
•
When pulling out the connector
Pull out the connector in straight while releasing the lock part of the
connector. Pulling out the connector with holding the cable (lead wire) may
result in damage to the connector.
