GE Fanuc high-performance digital Fanuc AC Spindle Drives were available in a broad range of sizes for use with GE Fanuc CNC Controls and Power Mate motion control systems. The GE Fanuc serial AC Spindle servo Systems, proven on hundreds of thousands of machines installed worldwide, offers a high-performance solution for most applications. They were specifically developed for machine tool applications offering world-class reliability, convenience and operating economy. The Fanuc AC spindle motor design features a precision balanced rotor for high speeds and low vibration as well as a unique cooling system, which provides sustained high power outputs for high-performance CNC machine tools. Fanuc Alarm 12 troubleshooting. Fanuc AC Spindle Servo Unit part numbers below.