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Do not use the tapped holes of a motor to lift or move any other object along with the motor. Doing so can damage the
motor. Depending on the type of motor, the place and direction in which the motor can be lifted may be predetermined. For
details, refer to the DESCRIPTIONS manual of the motor (shown earlier).
• Do not touch a motor when it is running or immediately after it stops.
A motor may get hot when it is running. Do not touch the motor before it gets cool enough. Otherwise, you may get
• Do not remove a nameplate from a motor.
The nameplate is used to identify the motor during maintenance work. If a nameplate comes off, be careful not to lose it.
• Do not step or sit on a motor, and avoid applying shock to a motor.
Any of these acts can deform or break the motor or affect its component, crippling the normal motor operation. Do not put a
motor on top of another motor.
• Comply with the specified conditions when conducting an electric test (winding resistance test,
insulation resistance test, etc.) for a motor or other device or supplying power.
- Conduct an electric test according to the specified method. Conducting such a test by any method that is not specified
can damage the motor.
- Do not conduct a dielectric strength test or insulation test for a Pulsecoder or other detector, or do not apply a
commercial power source voltage. Doing so can destroy the internal elements.
• Perform preventive maintenance (inspection of the external appearance, measurement of winding
resistance, insulation resistance, etc.) and cleaning on a regular basis.
To use a motor safely throughout its entire service life, perform preventive maintenance and cleaning on a regular basis. Be
careful, however, because excessively severe inspection (dielectric strength test, etc.) can damage its windings. For
information about winding resistance values, refer to the DESCRIPTIONS manual of the motor (its specification number is
shown in this manual). Information about insulation resistance is given later in this manual.
This manual is focused on the preventive maintenance work to be performed for a single FANUC motor or
detector alone. The information contained herein may not apply depending on the type or configuration of the
machine. When reading this manual, refer to the manual of the machine as well. If you have any questions or
doubts, do not act on your own; please contact the machine tool builder or FANUC.
For detailed information about a motor, see the manual list shown earlier and, if necessary, obtain the latest
version of the corresponding manual.
1.2.2 Preventive Maintenance of a Motor (Common to All Models)
This subsection describes the common preventive maintenance items to be handled regardless of the model of the motor. For the
items specific to a particular motor model, see one of the subsequent subsections that pertains to that particular motor model.
The preventive maintenance method differs from machine to machine in many respects. Depending on the
machine in use, it may be difficult for the user to perform periodic inspection or cleaning. If you are not sure
about anything as to preventive maintenance, consult with the machine tool builder and ensure that you can
perform periodic inspection and cleaning.
The machine should be used within the scope of specification defined by the machine tool builder. Using the
machine in any way that is outside the specified scope can reduce the motor's service life or cause a failure.
184.108.40.206 Main inspection items
The following table summarizes the main inspection items for a motor. If any of these items is found to be abnormal, stop the
use of the machine immediately and fix the abnormal part by repairing or replacing it. At the same time, identify and