- 18 -
1.3.2 Preventive Maintenance of a Servo Amplifier
To use a servo amplifier safely throughout its entire service life, perform daily and periodic inspections.
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 servo amplifier's service life or cause
Ambient temperature V
Around the power magnetics cabinet: 0°C -
Inside the power magnetics cabinet: 0°C -
90% or below RH (dew condensation not
Dust/oil mist V
There shall be no dust or oil mist attached near
the servo amplifier.
Cooling air path V
The cooling fan shall be operating normally
without the air flow being interrupted.
- No abnormal noise or vibration shall be
present that has not been experienced in
- Vibration near the servo amplifier shall be
0.5 G or less.
Supply voltage V
200-V input type: Within 200 - 240 V
400-V input type: Within 400 - 480 V
There shall be no abnormal noise or smell, and
there shall be no dust or oil mist attached.
Screw V There shall be no loose screw.
(NOTE 1, 2)
- There shall be no abnormal vibration or
noise, and the fan blades shall be rotating
- There shall be no dust or oil mist attached.
Connector V There shall be no loose or broken connector.
There shall be no sign of overheating or sheath
deterioration (discoloration pr crack).
Pulse coder battery
The machine operator's panel or screen shall
not display the alarm indicating the battery
voltage of the absolute Pulsecoder is low.
Magnetic contactor V The contactor shall not rattle or chatter.
Ground fault interrupter V The interrupter shall be able to trip.
AC reactor V There shall be no hum.
1 Fan motors are periodic-replacement parts. It is recommended to inspect fan motors on a routine basis and
replace them in a preventive manner.
2 Fan motors and batteries are periodic-replacement parts. It is recommended to keep spare parts.