The Fanuc A86L-0027-0001 rotary spindle encoder (pulse coder) mounted on the main shaft provides precise spindle position and speed feedback for Fanuc CNC systems. This incremental encoder offers ~1024 pulses per revolution (PPR) and supports speeds up to ~4000 RPM, with a 17‑pin interface for connection to Fanuc spindle motors and CNC controllers. It is designed for shaft-mounted spindle integration and is commonly used on CNC machining centers, lathes, and milling machines to maintain synchronized motion and accurate threading and spindle orientation. This device is listed as a discontinued/legacy component, with common replacement being Fanuc A86L-0027-0001#002.
