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αSTEP Hybrid Servo Motor / Stepper Motors
AZ Series Closed Loop, Absolute Encoder Servo Motors
The αSTEP 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 αSTEP 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
- αSTEP AZ Series Driver Required*
AR Series Hybrid Servo Motor / Stepper Motors
The αSTEP 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 αSTEP AR Series also achieves up to 40% less power consumption, improved angle accuracy and is capable of driving large inertia loads. For use with αSTEP 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
- αSTEP AR Series Driver Required*
Closed Loop Performance
These products use our αSTEP 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.
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.
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.
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.
Product Comparison
Product Series |
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Feedback Type |
Mechanical Absolute |
Resolver |
Basic Step Angle |
0.36° |
0.36° |
Driver Required |
AZ Series |
AR Series |
Driver Power Input |
AC |
AC |
Frame Sizes |
1.65 in. (42 mm) NEMA 17 |
1.65 in. (42 mm) NEMA 17 |
Available Options |
Geared Type |
Geared Type |
Max. Holding Torque |
42 oz-in up to 752 lb-in |
42 oz-in up to 320 lb-in |
0.3 N·m up to 85 N·m |
0.3 N·m up to 37 N·m |
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Learn More |
Closed Loop Videos
Servo / Stepper Motor Technical Articles
