
SAFETY PRECAUTIONS B-65262EN/03
s-6
1.3 CAUTION
CAUTION
- FANUC motors are designed for use with machines. Do not use them for any other
purpose.
If a FANUC motor is used for an unintended purpose, it may cause an
unexpected symptom or trouble. If you want to use a motor for an
unintended purpose, previously consult with FANUC.
- Ensure that a base or frame on which a motor is mounted is strong enough.
Motors are heavy. If a base or frame on which a motor is mounted is
not strong enough, it is impossible to achieve the required precision.
- Be sure to connect motor cables correctly.
An incorrect connection of a cable cause abnormal heat generation,
equipment malfunction, or failure. Always use a cable with an
appropriate current carrying capacity (or thickness). For how to
connect cables to motors, refer to their
respective specification manuals.
- When connecting the power line to the terminal block of a motor, tighten the
screw with the following torque:
Terminal size Tightening torque
M4 1.1 N⋅m to 1.5 N⋅m
M5 2.0 N⋅m to 2.5 N⋅m
M6 3.5 N⋅m to 4.5 N⋅m
M8 8.0 N⋅m to 10 N⋅m
M10 15 N⋅m to 16 N⋅m
- When mounting a crimp terminal at the end of a power line to keep the insulation
distance, always cover the crimping section of the crimp terminal with an
insulating tube.
When an insulating cover is mounted on the terminal block, screw the
power line, remount the cover in place, then use the motor.
- Ensure that motors are cooled if they are those that require forcible cooling.
If a motor that requires forcible cooling is not cooled normally, it may
cause a failure or trouble. For a fan-cooled motor, ensure that it is not
clogged or blocked with dust and dirt. For a liquid-cooled motor,
ensure that the amount of the liquid is appropriate and that the liquid
piping is not clogged. For both types, perform regular cleaning and
inspection.
- When attaching a component having inertia, such as a pulley, to a motor, ensure
that any imbalance between the motor and component is minimized.
If there is a large imbalance, the motor may vibrates abnormally,
resulting in the motor being broken.