ASDA-B2 Chapter 2 Installation
Revision May, 2018 2-7
2.4.4 Precautions for Using Couplings
Caution:
It is suggested to use a flexible coupling specifically designed for servo motors, especially
double spring couplings, which provide some buffer tolerance during eccentric motion and
deflection. Please select appropriate coupling size for the operating conditions. Improper
usage or connection may result in damage.
1. The anti-rust coating or oil on the motor shaft end must be wiped off.
2. If using a servo motor with a keyway, attach the supplied key or use a key that
matches the dimensions of the drawing to the motor shaft.
Note: when installing the key on the motor, do not apply excessive force to the keyway or
motor shaft.
3. Use dial gauge or other methods to ensure that the centering accuracy is within the
specification. If you cannot use the dial gauge or other methods, you can slide the
coupling along both axes and adjust it until it does not get stuck.
4. Servo motor shaft installation safety precautions
(1) When connecting the shaft, make sure that the required centering accuracy is
reached. If the shaft is not correctly centered, vibration may damage the bearings
and encoder.
(2) When installing the coupling, do not apply excessive force to the shaft. Also, do
not apply excessive force to the area around the encoder, as the impact may
damage the encoder.
(3) If the coupling makes any abnormal noise, please re-align the shaft until the noise
disappears.
(4) Make sure that the axial load and radial load are within the specifications. Please
refer to the specifications for the maximum axial load (N) and maximum radial
load (N) for each servo motor.
This distance is measured at four different
positions on the circumference for the centering
accuracy. The difference between the maximum
and minimum measurement values must be 0.03
mm or less; and even within this range, you can
make adjustments to increase the centering
accuracy as much as possible.
Note: when measuring, rotate the coupling and
the motor shaft together.
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