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DGII Series Closed Loop Hollow Rotary Actuators

AlphaStep DGII Series Hollow Rotary Actuators


DGII Series Closed Loop AZ Series Absolute Encoder Hollow Rotary Actuators

The DGII Series is a line of of products that combine a high rigidity hollow rotary table with an AlphaStep absolute encoder AZ series closed loop stepper motor and driver package. It retains the ease of use of a stepper motor, while also allowing for highly accurate positioning of large inertia loads.

  • Integrated actuator and stepper motor makes design easier
  • Easy Home Setting and Return-to-Home without need for sensors
  • Large-diameter hollow output table
  • Stepper motor provides excellent performance
    • Agile responsiveness
    • Stability at low speeds
    • Tuning-free
  • Pulse Input, Pulse Input with RS-485 Communication and Built-in Controller (Network) type drivers

Mechanical Absolute Encoder

Mechanical Absolute Encoder

Rotary Actuator Lineup

Frame Size

Driver Type

Power Supply



Permissible Speed

Permissible Moment Load

60 mm Rotary Actuators

60 mm (2.36 in.)
Rotary Actuator

Built-in Controller (Network)

24 VDC


0.9 N·m

7.9 lb-in

200 r/min

2 N·m

17.7 lb-in

Pulse Input with RS-485 Communication

Pulse Input

85 mm Rotary Actuator

85 mm (3.35 in.)
Rotary Actuator

Built-in Controller (Network)

24/48 VDC

Electromagnetic Brake

4.5 N·m

39.8 lb-in

200 r/min

10 N·m

88 lb-in

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Pulse Input with RS-485 Communication

24/48 VDC

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Pulse Input

24/48 VDC

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

130 mm Rotary Actuator

130 mm (5.12 in.) Rotary Actuator

Built-in Controller (Network)

24/48 VDC

Electromagnetic Brake

12 N·m

106 lb-in

200 r/min

50 N·m

440 lb-in

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Pulse Input with RS-485 Communication

24/48 VDC

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Pulse Input

24/48 VDC

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

200 mm Rotary Actuator

200 mm (7.87 in.)
Rotary Actuator

Built-in Controller (Network)

Single-Phase 100-120 VAC

Electromagnetic Brake

50 N·m

440 lb-in

110 r/min

100 N·m

880 lb-in

Single-Phase 200-240 VAC

Pulse Input with RS-485 Communication

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Pulse Input

Single-Phase 100-120 VAC

Single-Phase 200-240 VAC

Repetitive Positioning Accuracy = ±15 arcsec (±0.004°)

Lost Motion = 2 arcmin (0.033°)


Hollow Rotary Actuators

Hollow Rotary Actuators

High Positioning Accuracy

  • Non-Backlash
  • Repetitive Positioning Accuracy ±15 sec
  • Lost Motion 2 arc minutes

Note: The repetitive positioning accuracy is measured at a constant temperature (normal temperature) under a constant load.

Large-Diameter, Hollow Output Table Makes Simple Wiring and Piping Possible

The large diameter hollow hole (through-hole) helps reduce the complexity of wiring and piping, thus simplifying your equipment design.

Hollow Output Table

Contributes to Easier Equipment Design

The gear-reduction mechanism employs precision gears along with a proprietary adjustment mechanism that eliminates backlash. The repetitive positioning accuracy from a single direction is ±15 sec., while lost motion in a positioning operation from two directions is 2 arc minutes. These characteristics make the DGII series the ideal choice for applications in which accurate positioning is a must.

Rotary Actuator Features

*DGM60 features Deep-Groove Ball Bearings

High Power and Rigidity

The hollow output table is integrated with a high rigidity crossroller bearing*. The structure improves permissible thrust load and moment load while maintaining high torque.

The output table uses deep-groove ball bearings (two pieces) for the 2.36 in. (60 mm) frame size type, and a cross-roller bearing for the 3.35 in. (85 mm), 5.12 in. (130 mm) and 7.87 in. (200 mm) frame size types. As the frame size increases, the permissible moment load also increases but the displacement caused by the moment load decreases.

Direct Coupling for Higher Reliability

Equipment tables and arms can be installed directly on the output table. This saves you the hassle and cost of designing an installation mechanism, arranging necessary parts, adjusting the belt tension, etc. when mechanical parts such as belt and pulley are used for installation.

Direct Coupling

Because of Absolute System, Easy Home Setting and Return-to-Home is Possible

No Return-to-Home Sensor Required

Because it is an absolute system, no home sensor is necessary.

Reduced Costs

Sensor and wiring costs can be reduced, leading to overall lower system costs.

Not Affected by Sensor Malfunctions

There is no concern about sensor malfunction, sensor failure, or sensor wire disconnection.

Improved Return-to-Home Accuracy

Return-to-home is carried out without any concern over variation in home sensor detection, which can improve home accuracy.

*If no limit sensor is installed, driver software limits are used to prevent operation when a limit is exceeded.

Easy Home Setting

By pressing the switch on the driver surface, home position can be set simply, and the home position can be saved with the sensor. Furthermore, it is possible to set the home position using the data setting software (MEXE02) or the external input signal.

HOME Switch

High-Speed Return-to-Home

Since return-to-home is possible without the use of a home sensor, return-to-home is carried out at high speed without any concern over sensor sensitivity, which can shorten the machine cycle.

Easy Return-to-Home

Return-to-Home Not Required

The position information s retained even if the power shuts off during positioning. Furthermore, if the built-in controller type is being used, positioning is restarted without return-to-home when the power is restored after a power outage or an emergency top on the production line.

Continue after Emergency Stop

The Mechanical Sensor does not Need a Battery


The sensor is mechanical, thus it doesn't require a battery. Since position information is mechanically managed by the absolute sensor, positioning information can be retained even if there is a power outage or the cable between the motor and driver is disconnected.

Reduced Maintenance

Because there is no battery that needs replacement, maintenance time and costs can be reduced.

Unlimited Driver Installation Possibilities

Because there is no need to secure space for battery replacement, there are no restrictions on the installation location of the driver, improving the flexibility and freedom of the layout design of the control box.

Safe for Long Distance Shipping

Ordinary batteries self-discharge, thus caution is required for long-term transportation, such as overseas shipping. The motor sensor is battery-free, thus there are no restrictions on the retention of positioning information. This also means that there are no concerns about shipping regulations for batteries when exporting.

Position Retention Even if the Cable Between the Motor and Driver is Disconnected

Positioning Information is retained in the motor sensor.

Useful Functions Thanks to the Built-in AZ Series

Convenient Operation & Setting

By using the AZ Series functions, the hollow rotary actuator's output table coordinates are managed and the following operations become possible.

Short-Cut Operation Reduces Takt Time

This is an operation method that drives the equipment in the rotation direction, providing the shortest distance to the target position that has been set. It can reduce the amount of takt time for the equipment.

Short-Cut Operation

Easy Control by Setting No-Entrance Areas

If there are dangerous or damaging items on the equipment, it is possible to set an area into which the output table cannot be moved.

No Entry Area

Reduced Equipment Setup Time

The parameters necessary to operate the hollow rotary actuator are set at the time of shipment, which contributes to reduce equipment setup time.

  • Home Position
  • Resolution Setting (0.01°/step)
  • Output Table Rotation Direction Setting
  • Round Setting ±180°

All of the initial settings can be changed.

Reduced Set Up Time


Built-in Controller (Network) Type Driver

Built-in Controller (Stored Data Type) Driver

With the built-in controller type, the operating data is set in the driver and is selected and executed from a host system. Host system connection and control are performed with ; I/O, Modbus (RTU) / RS-485 or FA network.

Built-in Controller

Equipped with an Interface that Connects to Various Master Control Systems

FLEX Network Products

FLEX is the generic name for products that are used for Factory Automation (FA) network control via I/O control, Modbus (RTU) control, or a network converter.

FLEX products enable easy connection, easy control, and reduce the complexity of system configuration.

FLEX Connection

By using a network converter (sold separately), CC-link, MECHATROLINK or EtherCAT communication are possible. Operating data, parameter settings and operation commands can be input via various communication types. Its ability to accommodate the network being used results in shortened design time.

Program Simplification with Easy Sequence Function

Sequence control program simplification is possible with the built-in controller type by incorporating output signals for controlling other devices and external input signals, such as sensors.

The built-in controller type driver can set and execute independently, up-to 256 items of operating data, such as motor speed and index length. With the sequential control, it is possible to form a simple system without a master controller. This is ideal for index and return operations or aligned transportation, such as lifespan or durability tests.

  • Number of positioning operation data settings (up to 256 data settings)
  • Number of general-purpose input/output points (9 input points, 6 output points)
  • Number of input/output points for communication (16 input points, 16 output points)
Easy Sequence Function


Extended Functions

Easy Setting and Easy Driving

Unit Setting Wizard

This is a function that allows the traveling amount, speed, etc. to be displayed and input in the designated units. It can be easily set by following the directions displayed on the screen.

MEXE02 Software

Teaching and Remote Operation

Data setting software can be used to perform the home setting and also drive the motor. This can be used for teaching or test drive purposes.

Teaching Operation

Monitoring Function

I/O Monitoring

The status of the I/O wired to the driver can be checked on a computer. This can be used for post-wiring I/O checks or I/O checks during operation.

I/O Monitoring

Waveform Monitoring

The operating status of the motor (such as command speed and feedback speed), can be checked by an oscilloscope-like image. This can be used for equipment start-up and adjustment.

Waveform Monitoring

Alarm Monitoring

When an abnormality occurs, the details of the abnormality and the solution can be checked. Because the solution can be checked it is possible to respond to abnormalities quickly.

Alarm Monitoring

Network Gateways

Network Gateways

The communication protocol of the master controller, Factory Automation (FA) network, is converted to Oriental Motor's own RS-485 communication protocol. Connection to Oriental Motor's network compatible products is completed with one RS-485 communication cable.

  • Compatible Networks:

*For use with Stored Data (Network) type



SCX11 Universal Controller

universal controller

The SCX11 is a highly-functional and sophisticated controller equipped with program editing and execution functions. Use the SCX11 as a stored program controller to connect to any of Oriental Motor's standard pulse input drivers. The SCX11 is also able to control the motor via serial communications such as USB, RS-232C and CANopen.

*For use with Pulse Input Type driver.


RS-485 Communication Cable

RS-485 Communication Cable

These cables are used to link drivers when a built-in controller type is being operated in a multi-drop manner.

*For use with Stored Data (Network) or RS-485 type




0.82 ft. (250 mm)



These cables are used to connect or extend the distance between the motor and driver.

Required (sold separately).

Use a flexible motor cable if the motor is installed on a moving part or its cable will be flexed.


Control Options - Data Setting Software

Data Setting Software

MEXE02 Data Setting Software.

*A standard USB to mini B cable is used to connect all drive options to the computer (sold by a third party).


Mounting Pedestal

Installation Pedestal

This is a useful installation pedestal that enables the DGII Series to be used as a direct drive motor. Applications that require height and installation from the side can also be performed, expanding the range of available operations.


System Configuration

System Configuration

System Configuration

CAD / Manual Search

To locate product CAD and Operator Manuals please search using the product Item Number.



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