Fanuc Servo Drive A06B-6127-H209

I. Hardware Servo Drives

These are core components installed within the electrical cabinet of CNC machine tools. Their function is to control servo motors, which drive the motion of mechanical arms or worktables. FANUC’s servo drive products are extensive and, based on technological development, can be categorized into the following main series:

• Early Series: Includes Analog, S Series, C Series, etc. These were commonly used with CNC systems in the 1980s and 1990s and are still found in the repair market today.

• Mainstream Series (α/αi Series): This is the widely used digital AC servo drive series, characterized by modular design, high performance, and high reliability.

  • Composition: Typically consists of a Power Supply Module (PSM) , Servo Amplifier Modules (SVM, available in single-axis, dual-axis, and triple-axis configurations), and a Spindle Amplifier Module (SPM) .

  • Features: Utilizes fully digital sine-wave PWM control, driven by IGBTs or IPMs (Intelligent Power Modules). Paired with high-resolution encoders, it achieves high-precision, high-dynamic-response motion control.

• Economy Series (β/βi Series): Typically paired with βi series servo motors for applications sensitive to cost but with moderate performance requirements. They are commonly used in economical CNC systems.

• Latest Series (αi Series successors): These represent continuous performance improvements over the αi series, such as the αi-B and αiF models. They support higher resolution encoders (e.g., αi-B motors can achieve 32 million pulses per revolution), enabling even greater control precision and superior acceleration/deceleration performance.

💻 II. Software Drivers

This type of “driver” refers to software installed on a personal computer or data gateway. Its purpose is to establish a communication bridge between a host system (e.g., an MES system, data acquisition software) and a FANUC CNC (Computer Numerical Control) system.

• Primary Use: Enabling equipment data collection and production process monitoring.

• Common Types:

  • FOCAS Library/Ethernet Driver: This is the official library and driver provided by FANUC for Ethernet communication. Through it, host software can read and write internal CNC data such as coordinates, programs, and alarm information.

  • Third-Party Gateway Drivers: Some Industrial Internet of Things (IIoT) platforms (e.g., Telit deviceWISE) provide their own Fanuc drivers. These drivers are typically based on FOCAS but are packaged into a form that is easier to configure and use, for connecting FANUC PLCs or robots to an IoT platform.

💡 Summary

Simply put, when you refer to a “Fanuc Drive”: