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Hollow Rotary Actuators with Built-in Controller (Stored Data Type)
DG Series

FLEXHollow Rotary Actuators - DGII Series with Built-in Controller (Stored Data Type)

The new DGII Series uses the highly efficient and energy saving AlphaStep AR Series as the motor of the hollow rotary actuator. High accuracy positioning can be performed while keeping the user-friendly features of a stepper motor intact.

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.

Packages include 3 m (9.8 ft.) connection cables.

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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

Product Application Demos

Product Demo

Click to view Demo #1

Product Demo

Click to view Demo #2

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 monition 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.

Accurate Positioning
Actuator with High Strength, Accuracy and Reliability
Moment Load

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.
*Excludes the DG60

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.

"Home Sensor Set" is Available as an Accessory

Since the sensor set comes with all the parts required for the return-to-home operation, less time is spent designing, fabricating and procuring parts related to sensor installation.

DG130 Sensor Installation Example

Home Sensor Set is Available as an Accessory

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
Motor Features: High Reliability Plus High Efficiency. AlphaStep AR Series Now Used.

Adoption of a Rotor Position Detection Sensor (Resolver)

Rotor Detection Sensor

Because the sensor is compact and slim, the overall length of the motor has been reduced.

Performance such as heat resistance and vibration resistance is improved over regular optical encoders.

Because an encoder cable is not necessary, the motor and driver can be connected with just 1 cable.

High Efficiency and Energy Saving

A closed loop AlphaStep AR Series stepper motor and driver package has been adopted as the motor. This creates a more efficient and energy saving product compared with conventional models.

The AR Series uses Oriental Motor's closed loop control to maintain positioning operation even during abrupt load fluctuations and accelerations. The rotor position detection sensor monitors the rotation. When an overload condition is detected, the AR Series will instantaneously regain control using the closed loop mode. When an overload condition continues, the AR Series will output an alarm signal, thereby providing reliability equal to that of a servo motor. Learn more about the AlphaStep technology.

Lower Heat Generation

Heat generation by the motor has been significantly reduced through higher efficiency.

Speed Torque

Motor Surface Temperature during Same Operation Conditions

Continues Operation Even with Sudden Load Fluctuation and Sudden Acceleration

Operates synchronously with commands using open loop control during normal conditions. In an overload condition, changes immediately to closed loop control to correct the position.

Speed Torque


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 achieved by an advanced closed loop system or a servo motor.

Closed Loop Diagram

Power Consumption: 66% Less* Than Conventional Model

Speed Torque


Extended Functions

FLEXBuilt-in Controller (Stored Data) Type

Because the driver has the information necessary for actuator operation, the burden on the host PLC is reduced. The system configuration when using multi-axis control has been simplified.

Setting are configured using a control module (sold separately), data setting software or RS-485 communication.


How to Connect the Built-in Controller (Stored Data) Type

1. I/O

The positioning module (pulse generator) function is built into the driver, allowing the operation to use I/O by directly connecting to a switch box or PLC. Because a positioning module is not necessary on the PLC side, space is saved and the system is simplified.

Switch BoxPLCTouch Screen

2. Modbus (RTU)/RS-485

Operating data and parameters can be set and operation commands can be input using RS-485 communication. Up to 31 drivers can be connected to each serial communication module. Also, there is a function that enables the simultaneous start of multiple axes. The protocol supports Modbus (RTU), enabling connection with devices such as touch screen computers and PCs.

3. Factory Automation (FA) Network

Use of network converter (sold separately) enables support with CC-Link, MECHATROLINK or EtherCAT communication. Operating data and parameters can be set and operation commands can be input using various communication methods.

Operation Type

With built-in controller packages, the motor's operating speed and traveling amount are set with operating data and operations performed based on the selected operating data. The operation type is 4-pattern.

Item Content


Control Method

I/O Control
RS-485 communication Network Converter Connection
Modbus RTU Protocol Connection

Position Command Input

Set with operating data number
Command range per point: -8388608~8388607 [steps] (setting unit: 1 [step])

Speed Command Input

Set with operating data number
Command range: 0 ~ 1000000 [Hz] (setting unit: 1 [Hz])

Acceleration / Deceleration Command Input

Set with operating data number or parameters.
Acceleration/deceleration rate [ms/kHz] or acceleration/deceleration time [s] can be selected.
Command range: 0.001 ~ 1000.000 [ms/kHz] (setting unit: 0.01 [ms/kHz])
0.001 ~ 1000.000 [s] (setting unit: 0.001 [s])

Acceleration / Deceleration Control

Velocity filter, moving average filter

Return-To-Home Operation

Return-To-Home Method

2-sensor mode This is the return-to-home operation using limit sensors (+LS, -LS).
3-sensor mode This is the return-to-hoe operation using limit sensors and HOME sensor.
Pushing mode*1 This is the return-to-home operation for pushing to the mechanical end of a linear slide, etc.
Position preset This function allows a home position to be confirmed by inputting P-PRESET using an arbitrary position.
An arbitrary value can be set for the home position.

Positioning Operation

Number of Positioning Points

64 points (No. 0 ~ 63)

Operation Mode

Incremental mode (Relative positioning)
Absolute mode (Absolute positioning)

Operation Functions

One-shot operation This is a PTP (Point to Point) positioning operation.
Linked operation This is a multistep speed-change positioning operation linked to operating data.
Linked operation 2 This is a positioning operation with timer linked to operating data.
The timer (dwell time) can be set in the range of 0 ~ 50.000 [s].
(Setting unit: 0.001 [s])

Starting Methods

Operating data selection mode The positioning operation starts when START is input after M0 ~ M5 has been selected.
Direct mode (direct positioning) The positioning operation starts with the operating data number that was set with the parameters when MS0 ~ MS5 has been input.
Sequential mode (sequential positioning) The positioning operation starts in order from operating data No. 0 every time SSTART is input.

Continuous Operation

Number of Speed Points

64 points (No. 0 ~ 63)

Speed-Change Method

This switches the operating data number.

Other Operations

JOG Operation

+JOG or -JOG is input, and regular feeding is performed.

Automatic Return Operation

This automatically returns to the original stopped position when the motor has become misaligned due to an external force during non-excitation.

Control Mode

The normal mode or the current control mode can be selected.

Absolute Backup

Using the battery (accessory) makes the absolute system.

Push motion operation cannot be used with this product.

Positioning Operation

Main Function



Motor Resolution Setting Function*1

The motor resolution can be changed by the driver without the mechanically operated speed reduction mechanism.
A desired setting can be made from 100~10000 [P/R].

How to obtain the resolution on the actuator

Group Send Function (RS-485 communication or via network converter)

Configure a group of multiple axes connected using RS-485 communication, and send commands by group.

Perform simultaneous start and simultaneous operation for multiple axes.

Round Function

When the command position is outside the setting value of the "round setting range" parameter, this function returns the command position and multiple rotation data to 0. Because the multiple rotation data is also returned to 0 you can perform position control even for continuous rotation operations in the same direction that use the absolute backup system.

*When building an absolute system, the accessory battery (sold separately) is necessary.

Hardware Overtravel

This function stops the actuator when the mechanical limit is exceeded.

Software Overtravel

This function stops the actuator when exceeding the limit set by the software. Depending on the setting, an alarm can also be output without stopping.

STOP Input (External stop)

This function forcibly stops operation when there is an abnormality or other issue. Select instantaneous stop, deceleration stop, or all windings off (actuator holding force is off) as the stopping method.

Alarm Code Output

Output alarm codes that are occurring.

Alarm History

Even if the power is turned off, up to 10 alarms that have occurred can be stored. This can be used for troubleshooting.

Velocity Filter

This is used to make adjustments when a smooth start/stop or smooth motion at low speed operation is required. Even for sudden operation command changes, this function controls the speed changes of the actuator to prevent them from becoming too large.

Teaching Function*1

Move the load to the target position and store the position data at this time as the positioning data.

I/O Monitoring*1

Check the ON/OFF status of the I/O signals.

Waveform Monitoring*2

Check the operating speed and I/O signals as a waveform.

*1 Can be performed with the control module sold separately (OPX-2A) or data setting software (MEXE02) (see Extended Functions).
*2 Can be performed with the data setting software (MEXE02) (see Extended Functions).


Extended FunctionsExtended Functions

You can combine a control module (OPX-2A) (sold separately) or data setting software* (MEXE02) both to change parameters, add functions and perform various monitoring operations according to the needs of your system.

*Cable for connection to PC required for MEXE02 data setting software (sold separately**- see Accessories).

**One FREE CC05IF-USB communications cable is available per customer, contact Technical Support for more information.

Item Overview Basic

Selection of Pulse Input Mode

Select the 1-pulse input or 2-pulse input (negative logic) mode.

Yes Yes

In addition to the normal settings, phase difference input can be set.
- 1-pulse input mode (positive logic/negative logic)
- 2-pulse input mode (positive logic/negative logic)
- Phase difference input (1-multiplication/2-multiplication/4-multiplication)

- Yes

Resolution Setting

Select the resolution with the function switches (D0, D1, CS0, CS1).

Yes Yes

Changes the value of the electronic gear corresponding to each function switch (D0, D1, CS0,CS1).

- Yes

Running Current Setting

Changes the running current setting with the current setting switch (CURRENT)

Yes Yes

Changes the value corresponding to each of 0~F (16 levels) for the current setting switch (CURRENT)

- Yes

Standstill Current Setting

Sets the ratio of the standstill current relative to the running current.

- Yes

Motor Rotational Coordinates Setting

Sets the rotational coordinates of the motor.

- Yes

All Windings On Signal (C-ON input)

The input signal for the excitation of the motor.

Yes Yes

Sets the C-ON input logic for when the power supply is input.

- Yes

Return to Excitation Position Operation during All Windings On Enable/Disable

Sets whether or not to return to the excitation position (deviation 0 position) during all windings on.

- Yes

Alarm Code Signal Enable/Disable

Set to output the code when an alarm occurs.

- Yes

END Output Signal Range Setting

Changes the END output signal range.

- Yes

END Output Signal Offset

Offsets the END output signal value.

- Yes

A-/B- Phase Output

Use for motor position verification

Yes Yes

Timing Output Signal

This is output each time the motor rotates 7.2° (0.4° for output table)

Yes Yes

Velocity Filter Setting

Applies a filter to the operation command to control the motor action.

Yes Yes

Change the value corresponding to each of 0~F (16 levels) for the setting switch.

- Yes

Vibration Suppression Function for Normal Mode

Set to suppress resonant vibration during rotation.

- Yes

Set to suppress vibration during acceleration, deceleration and stopping.

- Yes

Gain Adjustment for Current Control Mode*

Adjusts the position and speed loop gain.

- Yes

Adjusts the speed integration time constant.

- Yes

Sets the damping control vibration frequency.

- Yes

Sets whether to enable or disable damping control.

- Yes

Selection of Motor Excitation Position at Power On

Selects the motor excitation position for when the power is turned on.

- Yes

Control Module Setting

Select whether to use symbols or an absolute value display for the speed display of the control module.

- Yes

Sets the geared motor gear ratio for the speed monitor (The gear ratio for the DGII Series is 1:18)

- Yes

*Except when to further reduce heat generation or noise, using normal mode is recommended.

Product Lineup


Frame Size

Power Supply

Permissible Torque

Permissible Speed

Permissible Moment Load


Permissible Thrust Load

N (lb.)

Standard Type Electromagnetic Brake Type


2.36 in.

24 VDC




2 (17.7) 100 (22)


3.35 in.

Single-Phase 100-120 VAC



200 10 (88) 500 (112)

Single-Phase 200-240 VAC


5.12 in.

Single-Phase 100-120 VAC

Single-Phase 100-120 VAC


200 50 (440) 2000 (450)

Single-Phase 200-240 VAC

Single-Phase 200-240 VAC


7.87 in.

Single-Phase 100-120 VAC

Single-Phase 100-120 VAC



100 (880) 4000 (900)

Single-Phase 200-240 VAC

Single-Phase 200-240 VAC

View Products = View all DGII Series products.

System Configuration

Control Options

Using either the optional control module or data setting software you can change parameters, add functions and perform various monitoring operations according to the needs of your system. (See Extended Functions)

Control Module (OPX-2A)


Cable for Data Setting Software

Cable for Data Setting Software

This communication cable is required for connecting to the
computer on which the data setting software is installed.

*One FREE CC05IF-USB communications cable is available per customer, contact Technical Support for more information.

Home Sensor Set

Home Sensor Set
A home-sensor set, which consists of a photomicro sensor, connector with cable, sensor mounting bracket, shielding plate and mounting screws, is provided to facilitate easy return to home operation.

Available in NPN or PNP sensor output.
Model Sensor

Installation 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.

Model Type Applicable Products
 MDG60A Single Shaft DG60-ARA
 MDG60B Single/Double Shaft DG60-ARA
 MDG85A Single Shaft DG85R-ARA
 MDG85B Single/Double Shaft DG85R-ARA
 MDG130A Single Shaft DG130R-ARA
 MDG130B Single/Double Shaft, Electromagnetic Brake DG130R-ARA

Connection / Extension Cables*

Motor Cables

Cables for connecting the motor and driver. Flexible and extension cables are also available.

*Packages include 3 m (9.8 ft.) connection cable set.

RS-485 Communication Cable

RS-485 Cable

This cable is used to link drivers when a built-in controller type is being used in a multi-drop manner.

Model Length Applicable Product(s)
CC001-RS4 0.33 ft. (100 mm)


CC002-RS4 0.82 ft. (250 mm)



Battery Set

Battery Set

Connect to the driver when used as the absolute backup system.

Network Converter

Network ConverterNetwork converter is a transducer from the host communication protocol to our unique RS-485 communication protocol. By using this network converter, our RS-485 compatible products can be controlled under host communication environment.

Network Type Product Name
EtherCAT Compatible NETC01-ECT
CC-Link Compatible NETC01-CC

Enclosure Fans Available for Control Box Cooling

Enclosure Fans for Control Box Cooling



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