Zero-Max ServoClass Couplings
•For high performance servo motor anddemanding motion control applications•High torsional stiffness for precision positioning
•Eco-Friendly, Adapted to RoHSDirective with no banned substances•Low inertia for high speed applications•Zero backlash and low hysteresis ensuresrepeatable precise positioning•Clean Room Applications
Today’s servo motor applications are moredemanding than ever.The precision positioning
requirements and high reverse load
characteristics of AC and DC servomotor
applications necessitate a
coupling design that
specifically addresses the needs of these
sophisticated systems. Zero backlash is another key requirement of ahigh performance servo
coupling. A
coupling
may be considered zero backlash and still
have a large amount of windup. Zerobacklash
is the ability of the
coupling to maintain the
same relative relationship between the input
and output shaft without lost motion. The
windup of the
coupling can be detrimental to
the servo system. A
coupling with a high
amount of windup will cause positioning errors
to the servo system. The Zero-Max ServoClass
coupling is a zero backlash
coupling and it
exhibits a verylow amount of windup. Inertia and torsional stiffness are criticalfeatures of a superior servo
coupling. The
inertia should be low so as not to add
significantly to overall inertia of the servo
system. The lower the inertia, the less energy
required by the motor to move the system and
therefore, higher acceleration is possible. The
torsional stiffness should be high enough toprevent the
coupling from winding up duringacceleration, deceleration or reversing
conditions. The torsional stiffness of the Zero-Max ServoClass
coupling leads to ahigher system resonant frequency, which inmost cases, is far above the operating range. Misalignment capability of a
coupling is alsoimportant in a motion control system. Usually,
the alignment of a well manufactured servo
system will be very good. Over time and underhigh load conditions, this alignment may
deteriorate. The
coupling should be capable of
handling this change. Also, the
coupling should
accommodate any lack of concentricity in the
connected shafts as well as the stack up of
tolerances in the motion assembly. Another
important benefit of a high misalignment
capability is the dispersion of reaction loads on
the bearings and bushings in the system. The
Zero-Max ServoClass
coupling utilizes a design
that provides adequate amounts of flexibility
but does not sacrifice any of the torque
capability or the torsional stiffness capability
and thereforeminimizes the reaction loads to
the servo motor bearings. Operating TemperatureRange --22°to +212°F--30°to +100°C
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www.zero-max.com Phone 1-800-533-1731 763-546-4300 Fax 763-546-8260
