IAI America ISWA - Manual (Page 57)

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1. Procedure for Motor Replacement
11.1.2 Installing a New Motor Unit
11.1.2.1 New Motor Unit
The new motor unit will be supplied together with the coupling installed as shown below.
Coupling already assembled
Attention needs to be paid
CAUTION : x Motor is to be mounted on the motor housing with the coupling attached and the
slit in the coupling aligned with the home position marked on the motor. Under
no circumstances should the coupling on the motor side be loosened. [Refer to
11.1.2.3 Aligning the Motor Position.]
The slit in the coupling is used as a reference when the relationship of the positions
for the actuator and the encoder is determined. There may be a case that the
home-returning function does not correctly operate if the coupling is loosened.