Yaskawa SGD7W-2R8A20A Sigma-7 Dual Axis Servo Drive for Fast Response in

Product Specification

Yaskawa SGD7W-2R8A20A Sigma-7 Dual Axis Servopack – Detailed Product Introduction

The Yaskawa SGD7W-2R8A20A is a dual axis servo drive from the Sigma-7 family, designed for high-performance motion control in compact industrial machines. It combines two servo axes in a single housing, reducing panel space and wiring while delivering the precision and reliability associated with Yaskawa’s Sigma-7 platform. This Servopack supports both linear and rotary servo motors, making it attractive for machine builders who want a single drive type across diverse motion axes. yaskawa.eu.com+2yaskawa.co.uk+2

The drive operates from a 200 V, three-phase AC supply and is rated for a maximum applicable motor capacity of 0.4 kW. In practice, it is typically used with small-to-medium Sigma-7 servo motors for pick-and-place systems, packaging machinery, and electronic assembly lines where fast response and precise positioning are essential. yaskawa.co.uk+1

Key Specifications of Yaskawa SGD7W-2R8A20A

Note: Always confirm detailed ratings and wiring limits in the official Sigma-7W product manuals because individual applications may have additional constraints. yaskawa.de

Performance and Control Capabilities

The SGD7W-2R8A20A belongs to the Sigma-7W series, which is built to deliver very fast response and accurate control in multi-axis applications. Within the Sigma-7 dual axis family, Yaskawa specifies a speed frequency response of up to 3.1 kHz, indicating how quickly the control loop can react to command changes and load disturbances. yaskawa.eu.com+1

This high bandwidth makes the drive a strong choice for:

• Short-stroke positioning with extremely rapid settle times

• High-frequency start/stop cycles in packaging or indexing machines

• Tight synchronous motion between axes when coordinated through a motion controller

Sigma-7 Servopacks integrate advanced tuning algorithms, including automatic gain adjustment and vibration suppression functions. These features help maintain stability in machines with flexible mechanics, lightweight arms, or long mechanical linkages. The dual axis architecture also reduces the variability between axes because both channels share the same drive hardware and generation of control technology. Yaskawa+1

Safety and Functional Integrity

Yaskawa’s Sigma-7 dual axis Servopacks, including models in the same family as the SGD7W-2R8A20A, support robust integrated safety functions. The platform offers Safe Torque Off (STO) up to SIL 3 and PL e, Category 3, and can be equipped with extended safety such as SS1 (Safe Stop 1), SS2 (Safe Stop 2), and SLS (Safely Limited Speed) depending on variant and system configuration. yaskawa.eu.com+2Yaskawa+2

Using these safety functions through appropriate wiring and safety controllers can reduce the need for external contactors and hardwired interlocks. This not only saves panel space but simplifies safety system design, while still enabling compliance with international safety standards when the overall architecture is validated correctly.

Networking and System Integration with MECHATROLINK-III

The SGD7W-2R8A20A communicates over MECHATROLINK-III, a deterministic industrial Ethernet-based fieldbus optimized for motion control. yaskawa.co.uk+1

Key integration advantages include:

• High-speed position and velocity command updates from the motion controller

• Coordinated multi-axis motion across many Sigma-7 drives on one network

• Reduced wiring complexity compared with traditional analog or pulse-train interfaces

• Access to extensive diagnostic information, alarms, and status bits over the network

For machine builders standardizing on MECHATROLINK-III, choosing SGD7W-2R8A20A helps maintain a unified control architecture while still benefiting from the compactness of a dual axis Servopack.

Mechanical and Electrical Design Considerations

In a typical installation, the SGD7W-2R8A20A is mounted in a control cabinet alongside other Sigma-7 Servopacks and peripheral devices. Although Yaskawa’s public product page does not list the physical dimensions for this specific code, it sits in the standard Sigma-7W mechanical format, sharing the same general layout of power terminals, motor outputs, and encoder connectors as other drives in the series. yaskawa.co.uk+1

Machine designers usually pay attention to:

• Adequate cooling airflow in the cabinet

• Correct routing of motor power wiring away from low-level signal lines

• Proper shielding and grounding to maintain encoder signal integrity

• Network topology, especially if combining many drives on a single MECHATROLINK-III segment

Because one unit controls two axes, the drive can reduce the total number of power cables and control cables compared with two separate single-axis drives. This can be important when cabinet space is constrained or when the machine must be as compact as possible.

Typical Application Areas

The performance and form factor of the SGD7W-2R8A20A make it suitable for a broad range of light-to-medium duty multi-axis applications, such as:

• Electronic assembly equipment and small gantry systems

• Pick-and-place robotics with two coordinated axes

• Labeling, sealing, and packaging machinery requiring precise synchronization

• Indexing tables, feeders, or conveyors where two axes are frequently used as a pair

The ability to work with both linear and rotary motors within the Sigma-7 ecosystem also benefits special-purpose machines that mix linear transfer stages with rotary actuators on the same line. yaskawa.eu.com+1

Product Availability and Lifecycle Notes

Some third-party distributors list the SGD7W-2R8A20A as “discontinued by manufacturer” or legacy stock, indicating that it may no longer be in active production even though it remains widely used in existing equipment. MITKCO+1

From a practical standpoint, that means:

• Installed machines will continue to rely on this exact model for spare parts

• OEMs planning new designs might review newer Sigma-7 variants or later Yaskawa platforms

• End users should verify availability and lead times when planning critical spare inventories

For accurate lifecycle status and recommended replacement part numbers, it is always best to consult Yaskawa directly or check the latest Sigma-7 product manuals and regional Yaskawa websites. yaskawa.de+1

Summary

The Yaskawa SGD7W-2R8A20A Sigma-7 dual axis Servopack is a compact, network-capable servo drive built for high-performance motion control. With 200 V three-phase input, 0.4 kW maximum applicable motor capacity, and two integrated axes, it helps machine builders reduce space and wiring while retaining the speed, precision, and safety functions that characterize the Sigma-7 series. yaskawa.co.uk+2yaskawa.eu.com+2

Thanks to MECHATROLINK-III communication, integrated safety up to SIL 3 / PL e, and advanced tuning and vibration control features, SGD7W-2R8A20A is a strong fit for packaging machines, electronic assembly systems, and compact multi-axis platforms that demand fast response and consistent motion quality. For search engines and technical readers alike, clearly using the full model name “Yaskawa SGD7W-2R8A20A Sigma-7 dual axis Servopack” in product descriptions, headings, and tables helps ensure the drive can be found and correctly identified in documentation, spare-part databases, and industrial automation catalogs.