The Fanuc A860‑0309‑T302 spindle encoder is designed for Fanuc Alpha‑series and compatible CNC platforms, where it serves as an external spindle‑position coder (RPL‑type) for high‑precision milling machines, turning lathes, grinders, and automation cells. It replaces obsolete A86L‑0027‑0001‑series coders, providing accurate spindle‑orientation, indexing, and speed feedback that integrates directly with Fanuc servo amplifiers and controllers. This makes it ideal for aerospace, medical‑device, electronics, and R&D applications that demand repeatable spindle‑position control.
Technically, the A860‑0309‑T302 is an absolute‑type pulsecoder with 1024 pulses per revolution (1024 PPR), enabling fine angular resolution for tight‑tolerance cutting and indexing cycles. It supports spindle speeds up to 10,000 rpm, and uses an integrated 17‑pin connector that simplifies wiring and eliminates separate harnesses. The encoder’s internal electronics are tuned for low‑noise, high‑accuracy signal output that the CNC reads as a serial‑type position signal for closed‑loop spindle control.
Mechanically, the encoder features a 68 mm square flange for direct mounting to the spindle or gearbox, plus a compact, industrial‑grade housing weighing about 2.0 kg. The unit is designed to withstand vibration, temperature swings, and oil‑mist in harsh shop environments, with a robust bearing and seals suitable for continuous‑duty operation. Installation is straightforward: bolt the square flange to the machine structure and plug the 17‑pin connector into the matching cable leading to the servo amp, without cabinet‑cutout changes.
