Mitsubishi HG-KR User Manual
2. INSTALLATION
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(2) Check the cables and the like for scratches or cracks. Especially when the cable is movable, perform
periodic inspection according to operating conditions.
(3) Check the servo motor shaft and coupling for misalignment.
(4) Check the power supply connector and encoder connector tightening screws for looseness.
2.9 Parts having service lives
Service lives of the following parts are listed below. However, the service lives vary depending on operation
and environment. If any fault is found in the parts, they must be replaced immediately regardless of their
service lives. For parts replacement, please contact your local sales office.
and environment. If any fault is found in the parts, they must be replaced immediately regardless of their
service lives. For parts replacement, please contact your local sales office.
Part name
Life guideline
Bearings
20,000 hours to
30,000 hours
Encoder
20,000 hours to
30,000 hours
Cooling fan
20,000 hours
Oil seal
5000 hours
Reducer
10,000 hours to
20,000 hours
(1) Bearings
When the servo motor is run at rated speed under rated load, bearings should be exchanged in 20,000
to 30,000 hours as a guideline. This differs on the operating conditions. The bearings must also be
changed if unusual noise or vibration is found during inspection.
to 30,000 hours as a guideline. This differs on the operating conditions. The bearings must also be
changed if unusual noise or vibration is found during inspection.
(2) Oil seal (including oil seal used on the reducer)
Oil seals must be changed in 5,000 hours of operation at rated speed as a guideline. They must also be
changed if oil leakage, etc. is found during inspection.
The functions have no problem even if an oil seal may sound during operation.
changed if oil leakage, etc. is found during inspection.
The functions have no problem even if an oil seal may sound during operation.
2.10 Machine accuracies
The following table indicates the machine accuracies of the servo motor around the output shaft and
mounting. (except the optional products)
mounting. (except the optional products)
Accuracy [mm]
Measuring
position
Flange
size
100 × 100 or
less
130 × 130
176 × 176 to
250 × 250
280 × 280 or
more
Runout of flange surface to output
shaft
shaft
a)
0.05 0.06 0.08 0.08
Runout of fitting OD of flange surface
b)
0.04
0.04
0.06
0.08
Runout of output shaft end
c)
0.02
0.02
0.03
0.03
b)
c)
a) A
A
A