NSK Megatorque PS Series, User Manual

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Notes for Proper Use of Megatorque Motor System
1. Precautionary statement for the prolonged use of the Driver Unit
1) Temperature
Keep the ambient temperature of the Driver Unit within 0 to 50[°C]. You cannot use the Driver Unit in a
high temperature atmosphere over 50[°C]. Keep a clearance of 100 mm in the upper and the lower side of
the Driver Unit when it is installed in an enclosure. If heat is built up on the upper side of the Driver Unit,
provide ventilation openings on the top surface or equip a forced air cool unit to take the heat out of the
Driver Unit. (Measures against contamination are required for the ventilation openings.)
2) Dust-proof and Waterproof
Put the Driver Unit in an enclosure with the protection code of IP54 or better. Protect the Driver Unit from
oil-mist, cutting oil, metal chips and paint fume, etc. Otherwise it may result in failure of electric circuits
of the Driver Unit.
(The IP code is to specify the protection level of enclosures from solid contamination and water. It is
specified in the IEC standard and other safety regulations.)
3) Wiring/Ground
Refer to the User's Manual for proper wiring.
When wiring and installing the Driver Unit, take appropriate measures not to contaminate it.
4) Storing
Store the Driver Unit in a place at where it is not exposed to rain, water, and harmful gas or liquid.
Store the Driver Unit in the place at where it is not exposed to direct sunlight. Keep the ambient
temperature and the humidity as specified.
5) The limited number of times for overwriting data to EEPROM.
The EEPROM is used to backup all data and programs. However, the number of times for overwriting is
limited to approximately 100 000 times.
2. Precautionary statement for the prolonged use of the Motor
1) Dust-proof and Waterproof of the Motor
The standard Motors are not made for dust-proof or waterproof (IP30 equivalent).
You cannot use the Motor in humid or oily atmosphere.
2) Use conditions
The allowable moment load and axial load depend on the Motor size. Double check the specified limits
of the Motor meet the actual use conditions.
An excessive load or excessive offset load will cause permanent deflection of the rotor and the bearing
abnormality. Be sure not to drop the Motor or not to give an excessive impact to it while transporting it or
installing it.
The flatness of the Motor mounting surface shall be 0.02 mm or less.
3) Periodic check
Puncture of the Motor and shorting or breakage of cable may occur depending on using and environmental
conditions. If the Motor is left in such conditions, it cannot exhibit its capability 100 % and will lead to a
problem of the Driver Unit. We recommend conducting the periodic preventive measures such as an
insulation resistance check of the Motor, to see its current condition.