Precautions for use
−5−
3 Precautions for use
This section covers restrictions and requirements the user should consider when using the
BLV
Series.
•
Regeneration energy
When the motor is used in operation such as vertical drive (gravitational operation) or sudden accelerating/
decelerating of an inertia body, regeneration energy may generate. Since the driver has no function to consume
regeneration energy, if the output capacity or overvoltage allowance of the DC power supply is small, the
protective function for the power supply or driver may be activated to stop the motor. When performing these
operations, use a DC power supply or battery that has a large output capacity or overvoltage allowance.
Also, use an electromagnetic brake type motor because there is a risk of falling the moving part in vertical drive
such as elevating equipment.
If the protective function for the power supply or driver is activated, contact your nearest Oriental Motor sales
office.
•
Do not conduct the insulation resistance measurement or dielectric strength test with the motor
and driver connected.
Conducting the insulation resistance measurement or dielectric strength test with the motor and driver
connected may result in damage to the product.
•
Do not use a solid-state relay (SSR) to turn on or off the power supply.
A circuit that turns on or off the power supply via a solid-state relay (SSR) may damage the motor and driver.
•
Notes for power ON/OFF using a mechanical contact
When turning on or off the power supply using a mechanical contact (breaker, electromagnetic switch, relay, etc.),
do so only the positive side (+) of the power supply using the mechanical contact. Turning on or off the positive
side (+) and the negative side (–) of the power supply simultaneously using a mechanical contact may cause
damage to the control circuit or peripheral equipment.
Refer to the USER MANUAL (Basic Function) for details.
•
Note on connecting a power supply whose positive terminal is grounded
The main power supply input terminal (CN1), I/O signal connector (CN4), communication connectors (CN5/CN6/
CN7), and control power supply input terminal (TB1) of the driver are not electrically insulated. When grounding
the positive terminal of the power supply, do not connect any equipment (PC, etc.) whose negative terminal is
grounded. Doing so may cause the driver and these equipment to short, damaging both.
•
Noise elimination measures
Refer to the USER MANUAL (Basic Function) for the noise elimination measures.
•
Grease measures
On rare occasions, grease may ooze out from the gearhead. If there is concern over possible environmental
contamination resulting from the leakage of grease, check for grease stains during regular inspections.
Alternatively, install an oil pan or other device to prevent damage resulting from contamination. Grease leakage
may lead to problems in the user’s equipment or products.
•
Note on using in low temperature environment
When an ambient temperature is low, a load torque may increase due to the oil seal or viscosity of grease used
in the gearhead, and the output torque may decrease or an overload alarm may be generated. However, as time
passes, the oil seal or grease is warmed up, and the motor can be driven without generating an overload alarm.
•
Apply grease to the hollow output shaft of a hollow shaft flat gearhead.
When using a hollow shaft flat gearhead, apply grease (molybdenum disulfide grease, etc.) on the surface of the
load shaft and inner walls of the hollow output shaft to prevent seizure.
•
The driver uses semiconductor components. So be extremely careful when handling it.
The driver uses components that are sensitive to electrostatic charge. Before touching the driver, turn off the
power to prevent electrostatic charge from generating. If an electrostatic charge is impressed on the driver, the
driver may be damaged.
•
Use a connection cable (included) when extending the wiring distance between the motor and driver.
•
Sliding noise of electromagnetic brake
The electromagnetic brake motor may cause sliding noise of the brake disk during operation.
There is no functional problem.