User Manual

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 hig h dynamic perform ance of servo motors can cau se
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 Forc e Ratings on page 17 for guidelines on how to achieve 20,000 hours of
motor bearing life.
A shaft key provides a rigid mechanical connect ion with the potenti al for self-alig nment, but the key
must be properly installed in the keyway. Refer to these secti ons for additional information:
• Dimensio ns on page 12 fo r dimensional inf ormation about the key and shaft keyway.
• Remove and Install a Shaft Key on page 21 for recom mendations on how to remove and
install a shaft key.
ATTENTION
Do not strike th e shaft, key, couplings, or pulleys with t ools during installati on or
removal.
Damage may occur to the motor bearings and the feedback device if sharp impact to the
shaft is appli ed during installation of couplings and pulleys, or a sha ft 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 obse r ve th ese saf ety procedur es could result in damage to the motor and its
components.