Rockwell Automation TL-Series Servo Motor - Manual (Page 7)

TL-Series Servo Motor Installation Instructions 7
Publication TL-IN001C-EN-P — March 2005
Making Mechanical Connection to the Motor Shaft
Mechanical connections to the motor shaft, such as couplings and pulleys, require a
torsionally rigid coupling or a reinforced timing belt. The high dynamic
performance of servo motors can cause couplings, pulleys or belts to loosen or slip
over time. A loose or slipping connection will cause system instability and may
damage the motor shaft. All connections between the system and the servo motor
shaft must be rigid to achieve acceptable response from the system. Periodically
inspect connections to verify their rigidity.
When mounting couplings or pulleys to the motor shaft, ensure that the
connections are properly aligned and that axial and radial loads are within the
specifications of the motor. Refer to Motor Load Force Ratings on page 11 for
guidelines on how to achieve 20,000 hours of motor bearing life.
A shaft key provides a rigid mechanical connection with the potential for
self-alignment, but the key must be properly installed in the keyway. Refer to:
• Mounting Dimensions on page 15 for dimensional information about the key and
shaft keyway, and
• Removing and Installing a Shaft Key on page 20 for recommendations on how to
remove and install a shaft key.
!
ATTENTION
Damage may occur to the motor bearings and the feedback
device if sharp impact to the shaft is applied during installation
of couplings and pulleys, or a shaft key. Damage to the
feedback device may result by applying leverage from the
motor mounting face to remove devices mounted on the motor
shaft.
Do not strike the shaft, key, couplings, or pulleys with tools
during installation or removal. Apply a constant pressure (e.g.,
with a wheel puller) to the user end of the shaft to remove any
friction fit or stuck device from the motor shaft.
Failure to observe these safety procedures could result in
damage to the motor and its components.