Rotary Actuators > αSTEP DGII Series Closed Loop, Absolute Encoder Hollow Rotary Actuators

DGII Series Closed Loop Hollow Rotary Actuators

αSTEP 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 αSTEP 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
Vertical or Horizontal Mount Motor Types
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
Requires AZ Series Driver (sold separately)
Use Ethernet Type mini Driver with 3rd party robots:
- Universal Robot e-Series (UR+ Certified)
- FANUC CRX Series Robots (Plug-in Compatible)

Mechanical Absolute Encoder

Product Features
Product Lineup
Accessories
System
Downloads & Reference

Rotary Actuators
Hybrid Control System

Application Examples

Applications subject to changing load inertia	Applications where a moment load is applied	Optical applications using the hollow hole

High accuracy positioning applications	High accuracy positioning applications using the hollow hole	Air absorption applications using the hollow hole

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

Vertical Motor Mount Type

Cable Direction

Power Supply Input	Cable Outlet Direction	Frame Size
Power Supply Input	Cable Outlet Direction	60mm (2.36 in.)	85mm (3.35 in.)	130mm (5.12 in.)	200mm (7.87 in.)
AC	Down Side	-	●	●	●
	Right Side	-	-	●	●
	Left Side	-	-	●	●
DC	Down Side	●	●	●	-
	Right Side	-	-	●	-
	Left Side	-	-	●	-

Part Number Code

Right or left side cable outlet direction item numbers are not available on the website. Contact your Oriental Motor sales office for more details.

Horizontal Motor Mount Type

Cable Direction

In addition to the conventional type in which the rotary table shaft and the motor shaft were arranged in parallel (motor vertical mounting), the product lineup also includes types in which the rotary table shaft and the motor shaft are perpendicular (motor horizontal mounting).

Select the type that best suits the installation space for the equipment.

(Example: For standard type with frame size of 85 mm)

mounting options

Advantages of Motor Horizontal Mounting

Machining of motor clearance hole is not necessary, thereby simplifying the installation plate.
Improved installability due to elimination of installation pedestal.
Cabling and piping can be routed between legs underneath the table.

horizontal motor mounting

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

Battery-Free

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

Can be Used for Rotation Applications Around a Robot’s Peripheral Axis

Universal Robot Certified

Rotary actuators that can be linked to universal robots
Easily set with URCap

FANUC Plug-in Compatible

Can be linked to FANUC's CRX Series cobots
Easy configuration through Tablet TP

Learn How

Hybrid Control System

αSTEP products are stepper motor based hybrid motors with a unique hybrid control system combining the benefits of "open loop control" and "closed loop control".

The position of the motor is always monitored, and then the driver automatically switches between 2 types of control depending on the situation.

Normally Operates in Open Loop Control for the Same Ease of Use as a Stepper Motor

Open Loop Control

High Response

By utilizing the high responsiveness of the stepper motor, moving a short distance for a short time is possible. The motors can execute commands without lag.

High Response

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.

Switches to Closed Loop Control during Overload for More Reliable Operation like a Servo Motor

Closed Loop Control

Continues Operation Even with Sudden Load Fluctuation and Sudden Acceleration

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

Closed Loop Control

Alarm Signal Output in Case of Abnormality

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

Rotary Actuator Lineup

Frame Size	Power Input	Options	Permissible Torque		Permissible Speed	Permissible Moment Load
60 mm (2.36 in.) Vertical Motor Mount Rotary Actuator	DC Input	-	0.9 N·m	7.9 lb-in	200 r/min	2 N·m	17.7 lb-in
85 mm (3.35 in.) Vertical Motor Mount Rotary Actuator	AC Input	Electromagnetic Brake	4.5 N·m	39.8 lb-in	200 r/min	10 N·m	88 lb-in
	DC Input
85 mm (3.35 in.) Horizontal Motor Mount Rotary Actuator	AC Input	Electromagnetic Brake	3 ~ 9 N·m	26 ~ 79 lb-in	100 ~ 300 r/min	10 N·m	88 lb-in
	DC Input
130 mm (5.12 in.) Vertical Motor Mount Rotary Actuator	AC Input	Electromagnetic Brake	12 N·m	106 lb-in	200 r/min	50 N·m	440 lb-in
	DC Input
130 mm (5.12 in.) Horizontal Motor Mount Rotary Actuator	AC Input	Electromagnetic Brake	12 ~ 24 N·m	106 ~ 210 lb-in	100 ~ 200 r/min	50 N·m	440 lb-in
	DC Input
200 mm (7.87 in.) Vertical Motor Mount Rotary Actuator	AC Input	Electromagnetic Brake	50 N·m	440 lb-in	110 r/min	100 N·m	880 lb-in

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

Lost Motion = 2 arcmin (0.033°)

Search by Specification

AZ Series AC Input Drivers

The αSTEP AZD (AC Input) 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. Advanced operation and function control is included through our MEXE02 software (free download). The αSTEP AZD (AC Input) 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
Pulse Input, Pulse Input with RS-485 Communications, Built-in Controller (Network), EtherCAT, EtherNet/IP™ or PROFINET Types
Single-Phase 100-120 VAC or Single-Phase/Three-Phase 200-240 VAC
For use with αSTEP AZ Series Motors (AC Input)

AZ Series DC Input Drivers

The αSTEP DC Input Drivers offer 24/48 VDC input voltage, high functionality and closed loop control. There are no external sensors to buy as the motor and driver complete the system. The αSTEP AZD-K (DC Input) can perform quick positioning operations over a short distance without the need for tuning, while providing smooth performance.

Built-in Protective Functions
Pulse Input, Pulse Input with RS-485 Communications, Built-in Controller (Network), EtherCAT, EtherNet/IP™ or PROFINET Types
24/48 VDC
For use with αSTEP AZ Series Motors (DC Input)

Multi-Axis Controller / Driver (EtherCAT)

A multi-axis controller that supports EtherCAT communication.Compatible with the CiA402 drive profile. It can be connected to the AZ Series DC input motors and electric actuators.

2-axis, 3-axis and 4-axis driver connections are available.