FANUC Pulse Rotary Servo Drive Encoder A860-0304-T112

FANUC A860-0304-T112 Pulse Coder Encoder

Overview

The A860-0304-T112 is best presented as a FANUC pulse coder used for encoder feedback in CNC servo systems. Public replacement listings consistently describe it as a 2500P pulse coder or 2500 PPR incremental encoder, and several sources position it as a direct replacement encoder for installed FANUC servo motor applications.

That makes it most suitable for repair, maintenance, and machine-support work where exact encoder feedback continuity matters more than broad catalog comparison.

In practical machine service, a pulse coder like this plays a direct role in position and speed feedback.

When the installed encoder fails, the machine can lose stable axis information, which affects motion quality and can stop production entirely.

For that reason, buyers usually search by the exact FANUC reference and by the known pulse-coder class rather than by a generic “encoder” category.

This model is also publicly associated with the reference A290-0561-V502, which is useful in replacement work because it gives buyers another cross-check when matching the installed unit.

For product-page use, the clearest positioning is straightforward: A860-0304-T112 is a 2500P FANUC pulse coder for CNC servo feedback and industrial replacement support.

Key Specifications

FAQ

Q1: What kind of product is A860-0304-T112?
It is a FANUC pulse coder used to provide encoder feedback in CNC servo systems. In practical machine use, this type of component supports position and speed feedback so the control can maintain stable axis response and repeatable motion.

Q2: Why is the 2500P classification important?
The 2500P classification identifies the encoder’s pulse-count class and helps place it correctly within the feedback system. In real replacement work, that matters because the installed control and motor setup are usually built around a specific encoder feedback range, not just around a generic encoder form factor.

Q3: Is this mainly a replacement-market part?
Yes. Public references present it primarily through CNC parts and repair channels, which is typical for FANUC feedback hardware used to support machines already in service. Buyers usually source it to restore the original encoder function of an installed servo motor rather than to build a new system around it.

Q4: Why does exact part-number matching matter so much with pulse coders?
Because encoder feedback devices are tightly tied to the machine’s existing servo motor and control architecture.

Even when two encoders appear similar physically, differences in pulse class, signal format, or motor fit can create installation and performance problems.

That is why exact FANUC reference matching is so important.

Q5: What should buyers verify before ordering?
Buyers should verify the exact part number on the installed encoder, the 2500P feedback class, and any cross-reference used in the machine’s existing documentation or label.

For encoder replacements, correct feedback matching is usually more important than general product-category similarity.