
1.GENERAL SPECIFICATIONS FOR THE βiS SERIES B-65302EN/01
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1.1 FEATURE
The FANUC AC servo motor βis series is an AC servo motor suitable
for feed axes and peripherals of machine tools, and industrial
machines. This servo motor realizes high cost-performance when
combined with a small-capacity amplifier. This series has the
following features:
Compactness
By employing a most advanced high-performance magnet and
optimized structure, the SERVO MOTOR βis series is made shorter
and compact in overall size.
Smooth rotation
The optimized magnetic pole structure enables smooth rotation to
give sufficient basic performance for feed axes in machine tools to
this series. (β2is to β22is)
Quick acceleration
Its original rotor shape allows high torque for this small-size light-
weight servo motor to give quick acceleration performance to the
motor.
High reliability
A totally-enclosed, friction-free brushless design is used. This allows
the servo motors to be used in demanding environments with no need
for special checks or maintenance.
High environmental resistance
The protection degree is IP65 as standard, ensuring high
environmental resistance.
Built-in high-resolution pulsecoder
This series contains a compact high-resolution β i series pulsecoder
(optical encoder), ensuring high-precision positioning. (Resolution:
65,536/rev., 131,072/rev.)
Intelligent functions
Intelligent functions for ID and thermal information are supported to
improve maintainability.
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ββ
βis series