Rockwell Automation TLY-Series Servo Motor - Manual (Page 6)

6 TL-Series Servo Motors
Publication TL-IN003A-EN-P — June 2007
Mechanical Connections
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 machine and the
motor shaft must be rigid to achieve acceptable system response. Periodically inspect connections to
verify their rigidity.
When mounting couplings or pulleys to the shaft, verify 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 17 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 these sections for additional information:
• Dimensions on page 12 for dimensional information about the key and shaft keyway.
• Remove and Install a Shaft Key on page 21 for recommendations on how to remove and
install a shaft key.
ATTENTION
Do not strike the shaft, key, couplings, or pulleys with tools during installation or
removal.
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 also may result by applying leverage from the faceplate to remove
devices mounted on the motor shaft.
Apply a constant pressure, with a wheel puller for example, to the user end of the shaft
to remove a friction fit or a stuck device.
Failure to observe these safety procedures could result in damage to the motor and its
components.