Fanuc Power Mate i-D/H Maintenance Manual

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Depending on the type of motor, the handling may involve a risk and require safety education in advance.
Also, some machines are difficult for users to clean on their own. If you are to clean the motor, consult with
the machine tool builder in advance with regard to the cleaning method, safety education, etc. Notes on motor cleaning
A motor is an electric product, which is incompatible with most kinds of fluid. When removing cutting chips, sludge, cutting
fluid, etc. during cleaning, note the following.
Note on cleaning Measure
Do not sprinkle fluid.
Do not wash by
Do not sprinkle or spray detergent or any other fluid over the motor (including its
peripheral components), or do not wash the motor by submerging it in such fluid.
When cleaning the motor, use a cloth moistened with a small amount of neutral
detergent so that the fluid does not enter the inside the motor.
Do not use solvent.
Solvent may damage the motor; do not use one. If the dirt is difficult to remove with
neutral detergent, use a cloth moistened with a small amount of industrial alcohol
(e.g., IPA). Be careful, however, because rubbing with force or repeatedly may
damage the coated or resin surface.
Do not leave the motor
wet or moistened.
If the motor is wet or moistened after cleaning, dry it before supplying power and
before performing electric tests. When drying the motor in an oven, make sure that
the temperature is below 40°C and that hot air does not blow directly against the
motor. Notes on the cutting fluid (informational)
Depending on the type of cutting fluid used, the motor and amplifier may be affected greatly. Take due care because, even if you
ensure that they do not come into direct contact with the fluid, a mist or atmosphere of the fluid can cause the problems
described below.
Type of cutting fluid requiring
Expected problem
Cutting fluid containing highly
active sulfur
Some types of cutting fluid contain highly active sulfur. If such cutting fluid
enters the inside of the motor or amplifier, it causes copper, silver, and other
kinds of metal to corrode, leading to a component failure.
Synthetic cutting fluid with high
Some types of cutting fluid containing such substance as
polyalkylene glycol
have very
high permeability. Such cutting fluid permeates into the inside of
the motor, causing insulation deterioration or component failure.
Highly alkaline, water-soluble
cutting fluid
Some types of cutting fluid that enhance their alkaline property using such
substance as
alkanolamine remain highly alkaline - pH10 or higher - when
diluted. If such cutting fluid is left attached for a long time, its chemical
change will deteriorate the resin and other materials of the motor and
Other types of cutting fluid not mentioned above may cause various unexpected problems. If any problem arises for which the
cutting fluid is thought to be responsible, consult with the machine tool builder or FANUC.
1.2.3 Preventive Maintenance of a Built-in Spindle Motor and Spindle
This subsection contains the safety precautions you need to bear in mind when performing preventive maintenance for a built-in
spindle motor (BiI or BiS Series) or the FANUC-NSK spindle unit. In some cases, the work may involve a life-threatening risk
or cause substantial damage. Make sure that you fully understand these safety precautions before carrying out the work.

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