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Short Range Servo Motors

AZ Series Closed Loop, Absolute Encoder Servo Motors

Short Range, Absolute Encoder Servo Motors - AZ Series

The AlphaStep AZ Series offers high efficiency, low vibration and incorporates our newly developed Mechanical Absolute Encoder for absolute-type positioning without battery back-up or external sensors to buy. Closed loop performance without hunting or gain tuning. Available with a built-in controller or pulse input driver which substantially reduces heat generation from the motor through the use of high-efficiency technology. Requires AlphaStep AZ Series Driver.

Battery-Free, Mechanical Absolute Encoder
Closed Loop Performance, No Hunting or Gain Tuning
Wide Range of Gear Types for Inertia Matching & Higher Torque
Electromagnetic Brake Type Available
AlphaStep AZ Series Driver Required*

AR Series Short Range Servo Motors

The AlphaStep AR Series offer high efficiency, low vibration, continuous operation with the security of closed loop performance without hunting or gain tuning. Available with a built-in controller or pulse input driver, the system substantially reduces heat generation from the stepper motor through the use of high-efficiency technology. The AlphaStep AR Series also achieves up to 40% less power consumption, improved angle accuracy and is capable of driving large inertia loads. For use with AlphaStep AR Series Drivers.

High-Efficiency, Continuous Operation
Closed Loop Performance, No Hunting or Gain Tuning
Wide Range of Gear Types for Inertia Matching & Higher Torque
Electromagnetic Brake Types
AlphaStep AR Series Driver Required*

Closed Loop Performance

These products use our AlphaStep closed loop technology to maintain positioning operation even during abrupt load fluctuations and accelerations without hunting or gain tuning. The rotor position detection sensor monitors the rotation speed and amount. When an overload condition is detected, it will instantaneously regain control using the closed loop mode. When an overload condition continues it will output an alarm signal, thereby providing reliability.

Closed Loop Control

No Hunting

Since these are stepper motors, there is no hunting problem. Therefore, when the motor stops, its position is completely stable and does not fluctuate. Closed Loop stepper motors are ideal for applications in which vibration would be a problem.

No Hunting

High Response

Like conventional stepper motors, closed loop stepper motors operate in synchronism with command pulses. This makes short stroke positioning possible in a short amount of time.

High Response

No Gain Tuning

Gain tuning for servo motors is critical, troublesome and time-consuming. Since these are stepper motors, there are no gain tuning requirements. Low rigidity applications, such as a belt and pulley system, are ideal for closed loop stepper motors.

No Gain Tuning

Product Comparison

Product Series	AZ Series Short Range, Absolute Servo Motors	AR Series Short Range Servo Motors
Product Series	Quick View	Quick View
Feedback Type	Mechanical Absolute Encoder	Resolver
Basic Step Angle	0.36°	0.36°
Driver Power Input	AC	AC
Frame Sizes	1.65 in. (42 mm) NEMA 17 2.36 in. (60 mm) NEMA 24 3.35/3.54 in. (85/90 mm) NEMA 34	1.65 in. (42 mm) NEMA 17 2.36 in. (60 mm) NEMA 24 3.35/3.54 in. (85/90 mm) NEMA 34
Available Options	Geared Type Electromagnetic Brake	Geared Type Electromagnetic Brake
Max. Holding Torque	42 oz-in up to 752 lb-in	42 oz-in up to 320 lb-in
Max. Holding Torque	0.3 N·m up to 85 N·m	0.3 N·m up to 37 N·m
Learn More	AZ Series Closed Loop, Absolute Servo Motors	AR Series Short Range Servo Motors