2-16
D
Keeping Foreign Objects Out of Units
•
Place a cover over the Units or take other preventative measures to prevent foreign objects, such as
drill filings, from getting into the Units during installation. Be sure to remove the cover after installa-
tion is complete. If the cover is left on during operation, heat buildup may damage the Units.
•
Take measures during installation and operation to prevent foreign objects such as metal particles,
oil, machining oil, dust, or water from getting inside of Servo Drivers.
j
AC Servomotors
D
Operating Environment
Be sure that the environment in which the Servomotor is operated meets the following conditions.
•
Ambient operating temperature:
0
°
C to +40
°
C
•
Ambient operating humidity:
20% to 80% (RH, with no condensation)
•
Atmosphere:
No corrosive gases.
D
Impact and Load
•
The Servomotor is resistant to impacts of up to 10 G
{98 m/s
2
}. Do not subject it to heavy impacts or loads
during transport, installation, or positioning. In addi-
tion, do not hold onto the encoder, cable, or connec-
tor areas when transporting it.
•
Always use a pulley remover to remove pulleys,
couplings, or other objects from the shaft.
•
Secure cables so that there is no impact or load placed on the cable connector areas.
D
Connecting to Mechanical Systems
•
The axial loads for Servomotors are specified in sec-
tion 5-2-3. If an axial load greater than that specified
is applied to a Servomotor, it will reduce the service
life of the motor bearings and may damage the motor
shaft. When connecting to a load, use couplings that
can sufficiently absorb mechanical eccentricity and
variation.
Recommended Coupling
Name
Maker
Oldham coupling
Myghty Co., Ltd
•
For spur gears, an extremely large radial load may
be applied depending on the gear precision. Use
spur gears with a high degree of accuracy (for exam-
ple, JIS class 2: normal line pitch error of 6
µ
m max.
for a pitch circle diameter of 50 mm). If the gear preci-
sion is not adequate, allow backlash to ensure that
no radial load is placed on the motor shaft.
Ball screw center line
Motor shaft center line
Shaft core
displacement
Backlash
Adjust backlash
by adjusting the
distance between
shafts.
System Design and Installation
Chapter 2
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