5
Operation
Note
•
Make sure that the motor case temperature does not
exceed 90 °C (194 °F) during operation of the motor.
Operation exceeding case temperature 90 °C (194 °F)
may significantly deteriorate the coils and ball bearings of
the motor and shorten the motor’s life span. Motor case
temperature can be measured by fixing a thermometer
on the motor surface. It can also be measured using
thermo tape or a thermocouple.
Thermal Class: 130 (B)
•
Single-phase motors use a capacitor and keep it
connected even after rotation of the motor has started.
Timing chart of SW1 and SW2
This timing chart is case of the basic connection (shown in page 4).
Run
Brake
Brake
Run
SW2
CCW
CW
OFF
ON
ON
OFF
OFF
CW
CW
CCW
SW1
Motor
RUN/STOP
SW1 operates motor and electromagnetic brake action.
Motor will rotate when SW1 is switched simultaneously to ON (short
circuit).
When SW1 is switched simultaneously to OFF (open), the motor stops
immediately by electromagnetic brake and holds the load.
Note
When operating the electromagnetic brake, there may be a
scraping noise because this braking system uses friction,
but this is not a problem.
The load may move downward in vertical drive applications. Check the
position of the load prior to operation.
Direction of rotation
•
Single-phase motor
To rotate the motor in a clockwise (CW) direction, switch SW2 to CW.
To rotate it in a counter-clockwise (CCW) direction, switch SW2 to CCW.
•
Three-phase motor
When connected according to the connection diagram, the motor will operate
in the clockwise direction (CW) as viewed from the motor’s output shaft.
To change the direction of rotation, change any two connections between R,
S and T.
Other operation
•
Shortening the motor’s starting time
If the electromagnetic brake is left release, the motor can be started much
faster. Optimum timing for release of the brake is at least 10 ms before
starting up the motor.
•
Releasing electromagnetic brake
If you wish to release the brake while the motor is stopped, apply voltage
between only the two brake terminals (MB). The electromagnetic brake is
released and the motor shaft can be free.
Time rating
•
Induction motors
Induction motors have a continuous rating.
•
Reversible motors
Reversible motors have a 30 minutes rating. (“30 min” is indicated on the
nameplate.)
Locked rotor burnout protection
The motor is equipped a function of overheat protection for when the motor
output shaft is locked.
Impedance protection
“ZP” is stamped on the motor nameplate. The motor has higher coil
impedance. When the motor goes into locked rotor condition due to a
malfunction, coil impedance rises, suppressing input power to the motor and
protecting the motor coil from burnout.
Troubleshooting
When the motor cannot be operated correctly, refer to the contents provided
in this section and take appropriate action. If the problem persists, contact
your nearest office.
Phenomena Check
items
Motor does not
rotate or rotates
slowly.
•
Check the power supply voltage.
•
Connect the power supply and the motor
correctly.
•
With a single-phase motor, connect the
supplied capacitor correctly.
•
If terminal blocks or crimp terminals are used,
check them for poor connection.
•
Keep the load at or below the allowable
value.
•
Check the voltage applied to the brake
terminal (MB).
Motor sometimes
rotates and stops.
•
Connect the power supply and the motor
correctly.
•
With a single-phase motor, connect the
supplied capacitor correctly.
•
If terminal blocks or crimp terminals are used,
check them for poor connection.
The motor rotates
in the direction
opposite to the
specified direction.
•
Connect correctly by referring to wiring
diagram.
•
With a single-phase motor, connect the
supplied capacitor correctly.
•
The rotating direction of the motor output
shaft may be different from that of the
gearhead output shaft depending on the gear
ratio of the gearhead. See “Rotation direction
of the gearhead output shaft” on page3.
•
The rotating direction is indicated as viewed
from the motor output shaft. Check the
reference direction.
Motor temperature
abnormally high
[Motor case
temperature
exceeds 90 °C
(194 °F)]
•
Check the power supply voltage.
•
With a single-phase motor, connect the
supplied capacitor correctly.
•
Review the ventilation condition.
Noisy operation
•
To replace the gearhead, assemble the motor
and gearhead correctly by referring to the
operating manual for the gearhead.
•
Assemble a gearhead of the same pinion type
as the motor.