αSTEP is a stepper motor based motor with a unique control that hybridizes the advantages of open loop control and closed loop control. It constantly monitors the position of the motor while automatically switching between the 2 controls depending on circumstances.

Open Loop Control in Normal Operation is as Easy to Use as Stepper Motors.

High Response

Short distances can be moved in a short period of time by utilizing the stepper motor’s high response. The motors can execute commands without lagging.

Holding the Stop Position without Hunting

During positioning, the motor stops with its own holding force without hunting. Because of this, it is ideal for applications where the low rigidity of the mechanism requires absence of vibration upon stopping.

Tuning-Free

Because it is normally operated with open loop control, positioning is still possible without gain adjustment even when the load fluctuates due to the use of a belt mechanism, cam, or chain drive, etc.

In Case of Overload, Closed Loop Control Provides More Reliable Operation.

Continues Operation Even with Sudden Load Fluctuation and Sudden Acceleration

It operates synchronously with commands using open loop control during normal conditions. When overload occurs, it switches immediately to closed loop control to correct the position.

Alarm Signal Output in Case of Abnormality

If an overload is applied continuously, an alarm signal is output. When the positioning is complete, an END signal is output. This ensures the same level of reliability as a servo motor.

Smooth Operation Even at Low Speed αSTEP AR Series

The standard microstep drive and smooth drive functions ^* reduce vibration at low speeds for smooth operation.

• *The smooth drive function automatically microsteps based on the same traveling amount and traveling speed used in the full step mode, without changing the pulse input settings.

Reduced Motor Heat Generation and Continuous Operation Possible through High Efficiency

Significantly Reduced Heat Generation

• Temperature Distribution by Thermography

  

• Motor Surface Temperature during Operation Under the Same Conditions

  

Power Consumption Reduction via Energy Savings

• AC Input

  Power consumption 45% less than conventional models (compared to Oriental Motor)

  

• DC Input

  Power consumption 35% less than conventional models (compared to Oriental Motor)

  

Continuous Operation (High frequency operation)

Can be operated at high frequency. The motor can be driven continuously.

Note

For continuous operation, a heat sink equivalent to an aluminum plate of the following size is required.

• AC input: 250 × 250 mm, 6 mm thickness
• DC input: 100 × 100 mm, 6 mm thickness

Rotor Position Detection Sensor (Resolver) Equipped αSTEP AR Series

The rotor position detection sensor detects rotor position information by using changes in inductance caused by changes in the clearance distance between the small teeth of the sensor rotor and the small teeth of the stator.

Reference Output Power for Stepper Motor (AC input only)

The output power (W) of the AC servo motor is indicated as “rated output power” when it is running at “rated speed.”
On the other hand, as stepper motors, with their characteristic high precision positioning and high torque at medium and low speeds, have no “rated speed,” no “rated output power” is given.

The following page shows for reference how much torque of the AR Series motor corresponds to the rated torque of what W of servo motors’ rated torque.

A Single Driver to Support a Variety of Motors

Various types of motors, such as the standard type and the geared type, can be connected to a single driver. Since there is no need to change the driver model for each motor combination, maintenance support is simplified. The driver is also equipped with an automatic recognition function to identify the type of motor connected.

The rotor position detection sensor detects rotor position information by using changes in inductance caused by changes in the clearance distance between the small teeth of the sensor rotor and the small teeth of the stator.

Easy to Use with High Functionality

Automatic Electromagnetic Brake Control (Excluding DC input pulse input type)

The electromagnetic brake is released when the motor is excited (= the current ON input is turned ON), and activated to hold the load in position when the excitation is cut off (= the current ON input is turned OFF). It is not necessary to provide a separate brake control circuit.

Note

AC input pulse input type requires a separate 24 VDC power supply for electromagnetic brake control.

Separation of Main Power and Control Power

The control power-input terminals are provided separately from the main power terminals. Even if the main power supply is cut off due to an emergency stop, etc., the position can be detected, and the alarm contents can be checked as long as 24 VDC is applied to the control power supply terminal. The pulse input type allows for operation even with power supplied only from the main power supply.

Maximum Extension Distance between Motor and Driver is 30 m.

The motor and driver can be extended up to 30 m using a connection cable. Extension cables and flexible cables are also available.

Push-Motion Operation

A force is continuously applied to the load. When contact is made with the load, the motor switches to push-motion operation status, and can pressurize at a constant torque.

Note

• The control module OPX-2A (sold separately) or MEXE02 support software is required to use push-motion operation.
• Do not perform push-motion operation using geared types. Doing so may damage the motor or gearhead.

Position Control in the Same Direction

The wrap function enables you to control positioning even in an application where positioning is repeated in the same direction.

Compact Driver (DC input only) αSTEP AR Series

This contributes to space saving for the control cabinet and equipment. Can be mounted directly on a DIN rail.

Compatible with 48 VDC

The motor runs on a 24 VDC or 48 VDC power supply. When used with 48 VDC, the torque is increased compared to 24 VDC. (20 mm and 28 mm frame sizes are for 24 VDC input only.)

A Stepper Motor with Advanced Characteristics; Easier to Use

• Low Vibration

  In addition to the microstep drive system, a smooth drive function has been added to make operation smoother. Even without changing the pulse input setting, the microstep drive is automatically performed with the same travel amount and travel speed as with the full step.

  

• Improved Angular Accuracy

  The improved current control technology improves the stop position accuracy of the motor. More accurate positioning is possible.

  

Easy Setup, Easy Operation αSTEP AR Series

The MEXE02 support software supports users with anything from start-up to maintenance. In addition to setting and editing the operation data and various parameters with a computer, you can conduct teaching and monitor various statuses.

Click here for free download

Waveform Monitoring

A wide range of monitoring functions are available to grasp the motor operation status and I/O status.

Supports Various Standards to Assist Equipment Design (AC input only).

Degree of Protection IP65^*

The degree of protection of the motor is IP65^*. This means that the enclosure prevents intrusion of dust that can otherwise inhibit normal operation. (*Excluding the motor mounting surface and connector part. IP20 for double shaft products.)

Complies with the “SEMI F47” Standard for Semiconductor Manufacturing Equipment.

These products comply with the SEMI Standard on power supply voltage drop, and accordingly can be used effectively in semiconductor manufacturing apparatuses. The product can be considered for use in semiconductor manufacturing equipment. However, be sure to evaluate the product on actual equipment.

Components Conforming to International Safety Standards

These products are recognized by UL/CSA standards and they also bear the CE Marking as a proof of conformance to the Low Voltage and EMC Directives.