Closed Loop Stepper Motor Drivers


AZ Series Closed Loop Absolute Stepper Motor Drivers

Closed Loop Absolute Stepper Motor Drivers

The AZD Drivers offers superior high speed performance, high functionality and closed loop control. There are no external sensors to buy as the motor and driver complete the system. Available in a stored data (network) driver or pulse input driver. Advanced operation and function control is included through our MEXE02 software (free download). The AZD Drivers can perform quick positioning operations over a short distance without the need for tuning, while providing smooth performance.

  • Built-in Protective Functions
  • Emergency Torque Off Function (AC Input Only)
  • Pulse Input or Built-in Controller (Network) Types
  • Multi-Axis Controllers available (compatible with EtherCAT communication) (DC Input only)
  • AC or DC Input
  • For use with AZ Series Motors

AR Series Closed Loop Stepper Motor Drivers

Closed Loop Stepper Motor Drivers

The ARD Drivers offers superior high speed performance, low vibration and closed loop control. Available in a stored data (network) driver or pulse input driver. Advanced operation and function control is included through our MEXE02 software (free download). The ARD Drivers can perform quick positioning operations over a short distance without the need for tuning, while providing smooth performance.

  • Built-in Protective Functions
  • Pulse Input or Built-in Controller (Network) Types
  • AC or DC Input
  • For use with AR Series Motors


Closed Loop Performance

Closed Loop Rotor Position Sensor

These drivers 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

Types of Stepper Motor Drivers

Drivers that operate in the pulse input mode and built-in controller mode are available. You can select a desired combination according to the required operation system.

Pulse Input Drivers

The motor can be controlled using a pulse generator provided by the user. Operation data is input to the pulse generator beforehand. The user then selects the operation data on the host programmable controller, then inputs the operation command.

Pulse Input Type Drivers

Built-in Controller (Stored Data or Stored Program) Type Drivers

The built-in pulse generation function allows the motor to be driven via a directly connected personal computer or programmable controller. Since no separate pulse generator is required, drivers of this type save space and simplify wiring.

Built-in Controller Type Driver

Difference Between AC Input and DC Input Characteristics

A stepper motor is driven by a DC voltage applied through a driver. In Oriental Motor's 24 VDC input motor and driver systems, 24 VDC is applied to the motor. In the 100-115 VAC motor and driver systems, the input is rectified to DC and then approximately 140 VDC is applied to the motor (certain products are exceptions to this.)

This difference in voltage applied to the motors appears as a difference in torque characteristics at high speeds. This is due to the fact that the higher the applied voltage is, the faster the current rise through the motor windings will be, facilitating the application of rated current at higher speeds. Thus, the AC input motor and driver system has superior torque characteristics over a wide speed range, from low to high speeds, offering a large speed ratio.

It is recommended that AC input motor and driver systems, which are compatible over a wider range of operating conditions than DC input systems, be considered for your application.

AC Input vs. DC Input Drivers


Closed Loop Stepper Motor Product Comparison

Product Series

AZ Series Closed Loop, Absolute Stepper Motors

AR Series Closed Loop Stepper Motors

Closed Loop Absolute Stepper Motors

 

Closed Loop Stepper Motors

 

Features

Closed Loop,
Mechanical Absolute
Encoder

Closed Loop,
High-Efficiency

Basic Step Angle

0.36°

0.36°

Driver Power Input

AC or DC

AC or DC

Frame Sizes

1.65 in. (42 mm)
2.36 in. (60 mm)

1.10 in. (28 mm)
1.65 in. (42 mm)
2.36 in. (60 mm)
3.35/3.54 in. (85/90 mm)

Available Options

Geared Type
Electromagnetic Brake

Geared Type
Electromagnetic Brake

Max. Holding Torque

42 oz-in up to 88 lb-in

42 oz-in up to 320 lb-in

0.3 N·m up to 10 N·m

0.3 N·m up to 37 N·m

Learn More

AZ Series Closed Loop, Absolute Stepper Motors

AR Series Closed Loop Stepper Motors

Order Brochure

AZ Series Brochure

 

Stepper Motor Videos

Closed Loop Demo

AZ Series - Easy Home Setting

AZ Series - Restarting Demo

Closed Loop Demo

Stepper Motor Technical Articles



 

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Order the AZ Series Brochure

AZ Series Brochure