Fuji Electric Servomotor GYS101D5-RA2-B the Best Servo Technology in Industrial Automation

Fuji Electric GYS101D5-RA2-B Servo Motor: Integrating Precision, Safety, and Dynamic Control

The evolution of industrial automation demands more than just movement; it requires intelligent motion that is precise, reliable, and, above all, safe. The Fuji Electric GYS101D5-RA2-B AC Servo Motor is engineered to meet this multifaceted challenge head-on. This model represents a critical fusion of high-performance servo technology with an integrated safety holding brake, making it an indispensable component for applications where controlled stopping and position holding are non-negotiable. This in-depth product analysis will explore the technical specifications, functional advantages, and critical application scenarios for the GYS101D5-RA2-B, providing a definitive guide for engineers designing safety-critical and vertically-oriented automated systems.

The "-B" suffix in the model number GYS101D5-RA2-B is the key differentiator, explicitly indicating the inclusion of an electromagnetic brake. This feature elevates the motor from a simple motion device to a safety and control mechanism. When combined with the high-resolution absolute encoder (implied by the "-RA2" segment), this motor offers a complete package for applications that must hold a position securely in the event of a power loss or emergency stop, thereby preventing costly damage, production downtime, or hazardous situations.

Comprehensive Technical Specification Table

The table below provides a detailed breakdown of the GYS101D5-RA2-B's parameters, with special emphasis on the brake specifications that set it apart from its non-braked counterparts.

Critical Differentiators and System Benefits

1. Integrated Safety and Load-Holding Capability
The primary advantage of the GYS101D5-RA2-B is its integrated electromagnetic brake. This fail-safe mechanism is designed to automatically engage and hold the motor shaft in a fixed position when electrical power is removed. This is crucial for:

• Vertical Axis Applications: Preventing a Z-axis, robot arm, or lift mechanism from falling due to gravity after a power outage or emergency stop, thereby protecting the machine, product, and personnel.

• Emergency Safety Stopping: Providing a mechanical lock to complement the electronic safety functions of the servo drive, ensuring a stopped load remains stationary.

• Parking and Maintenance: Holding a position securely for tool changes, workpiece loading, or during manual maintenance procedures, enhancing operational safety.

2. High Dynamic Performance with Controlled Deceleration
Despite the added brake assembly, this motor retains the high dynamic performance characteristics of the GYS101D series. The low rotor inertia (even with the slight increase) allows for rapid acceleration and deceleration. The brake is not intended for stopping the motor during normal operation—that is the role of the servo drive's regenerative braking and controlled deceleration routines. Instead, the brake acts as a holding device once the motor has been brought to a stop by the drive, ensuring there is no unintended movement.

3. Seamless Integration with Servo Drive Systems
The GYS101D5-RA2-B is designed to work in perfect harmony with Fuji Electric's family of servo amplifiers. The brake control can be seamlessly integrated into the drive's safety and control logic. The drive can manage the timing sequence, ensuring the brake is only released after the servo is enabled and ready to accept a torque command, and that it is engaged before the servo is shut down. This integrated control prevents "load-dropping" scenarios and simplifies the control cabinet wiring by eliminating the need for complex external relay circuits.

4. Robust Construction for Demanding Environments
Like its counterparts, this motor boasts an IP65 protection rating, making it resistant to dust and water jets. This is particularly important for braked motors, which are often used in machine tools, packaging equipment, and other environments where exposure to coolants, oils, or moisture is common. The robust construction ensures the sensitive brake mechanism remains uncontaminated and fully functional throughout the motor's service life.

Target Applications and Industry Use-Cases

The GYS101D5-RA2-B is specifically tailored for applications where safety and position integrity are paramount:

• Robotics: Vertical axis actuators in 6-axis and SCARA robots, and gripper rotation mechanisms where holding position is critical.

• Machine Tool Automation: Automatic Tool Changers (ATCs), pallet changers, and tailstocks in CNC machining centers and lathes.

• Material Handling: Z-axes on pick-and-place units, vertical conveyors, and lifting columns where a power loss could cause a load to drop.

• Packaging and Assembly: Indexing tables that must maintain position during power interruptions and robotic arms used in assembly processes.

• Semiconductor Manufacturing: Load ports and wafer handling robots that require precise and safe positioning at all times.

Design and Integration Best Practices

Integrating a braked servo motor requires careful consideration beyond a standard servo installation:

• Brake Control Circuitry: The brake must be controlled via a relay or a dedicated safe torque off (STO) output from the servo drive. The circuit must be designed to be fail-safe, meaning a broken wire or loss of power will cause the brake to engage.

• Timing and Sequencing: The control system must manage the critical timing between brake release and servo enable. A delay must be incorporated to ensure the brake is fully released before the servo attempts to move the motor, and vice-versa upon stopping.

• Brake Voltage Supply: A dedicated, well-regulated 24V DC power supply is required for the brake coil. It must be sized to handle the in-rush current during brake release.

• Holding Torque Verification: Always verify that the brake's static holding torque (e.g., 0.5 N.m) is sufficiently greater than the maximum torque the load can apply to the motor shaft under worst-case conditions (including safety factors).

Conclusion: The Cornerstone of Safe and Precise Automation

The Fuji Electric GYS101D5-RA2-B is more than a component; it is a critical safety and performance solution. By integrating a reliable fail-safe brake with a high-dynamic servo motor, it addresses some of the most critical challenges in modern automation design. For engineers building machinery where controlled stopping, vertical load holding, and operational safety are essential, the GYS101D5-RA2-B is not just an option—it is a fundamental requirement. It embodies Fuji Electric's commitment to providing comprehensive, intelligent, and safe motion control solutions for the industry's most demanding applications.