Chapter 3 Installing the actuator
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3-3-3 Installation
Since the RSF supermini series actuator is a high precision servo mechanism, great care is required for
proper installation.
Install the actuator taking care not to damage accurately machined surfaces. Do not hit the actuator
with a hammer. Take note that actuators provide a glass encoder, which may be damaged by impact.
Procedure
(1) Align the axis of rotation of the actuator and the load mechanism precisely.
Note 1: Very careful alignment is required especially when a rigid coupling is applied. Slight
differences between centerlines will cause failure of the output shaft of the actuator.
Note 2: When installing the actuator to a coupling, use a plastic hammer to avoid excessive
physical shocks.
(2) Fasten the flange of the actuator with flat washers and high strength bolts. Use a torque wrench
when tightening the fasteners.
The recommended tightening torque is shown in the table below:
Model
RSF-3C
RSF-5B
Number of bolts
4
2
Bolt size
M1.6
M2
Installation PCD
mm
15
25
Wrenching torque
N
m
0.26
0.25
kgf
m
0.03
0.03
Transfer torque
N
m
3.0
2.0
kgf
m
0.3
0.2
Recommended bolt: JIS B 1176 bolt with hexagonal hole; Strength category: JIS B 1051 12.9 or greater
(3) For wiring operation, refer to “driver manual or data sheet.”
(4) Motor cable and encoder cable
Do not pull the cable. Do not hang the actuator with the cable. If you do, the connection part
may be damaged. Install the cable with slack not to apply tension to the actuator. Especially,
do not use the actuator under any condition where the cable is bent repeatedly.
Do not disassemble and re-assemble the actuator.
The Harmonic Drive Systems, Inc. does not guarantee the actuator that has been
reassembled by others than the authorized persons by the Harmonic Drive Systems,
Inc.
CAUTION
