FANUC Servo Encoder A860-2000-T301

What A860-2000-T301 is

A860-2000-T301 is listed by the seller's shop as a servo encoder: the feedback device that mounts at the rear of a FANUC servo motor and reports its rotation to the drive chain. It sits in the encoders family beside the A860-2005-T301 pulse coder — a neighbour close enough in number that the two are worth a page each, so neither is ordered in the other's place.

Neighbouring numbers in the A860 family are different devices for different motor pairings. The digit groups are the identity; there is no safe sense in which a 2000-series device substitutes for a 2005-series one because the shapes look alike.

Where A860-2000-T301 works

On its motor, this encoder is the position witness for one axis: the servo amplifier drives, the motor turns, the encoder reports, the control corrects. Its failure modes are the family's usual ones — feedback alarms, drift, reference trouble — plus the cruellest, an intermittent that appears under vibration and vanishes on the bench unless the bench run is long enough.

The motor pairing governs everything. The device is ordered against a servo motor number, and the desk confirms the pair before dispatch; the blog guide on A860 matching sets out the checks in the order a buyer can perform them at the machine.

Before dispatch there is a comparison the buyer can settle in one photograph: the connector and mounting face of the old unit against the description in the reply. This number's buyers are usually replacing a coder that has already failed once, and the desk would rather spend a message on the comparison than a week on a return.

Condition options for A860-2000-T301

Shelf condition for this number is stated on inquiry, across the seller's range. Encoders hold their value in the used market precisely because a tested unit is demonstrably good or bad — there is little middle state — so the condition conversation for this family is really a test conversation, and the warranty period follows the condition word as usual.

The used FANUC parts page carries the full framework: what new, new-surplus and used mean at this desk, what the seller's warranty covers (1 year new, 3 months used), and what evidence a buyer can request before paying.

Testing A860-2000-T301 before dispatch

Rotation under observation is the test: the device is turned on the test bench and its reporting is watched for drop-out across the turn. That is the standard gate for every feedback device the desk ships, and it is the gate that separates a used encoder worth fitting from one that would import the old fault into a repaired axis.

For diagnosis rather than purchase, the repair desk runs the same test on a suspect unit and reports which link — device, cable, amplifier input — the evidence convicts, which is often the most valuable answer in a feedback investigation.

Ordering A860-2000-T301

Quote A860-2000-T301 in full, suffix included, and give the motor number it will serve. If the number came from a photograph of the label, say so and keep the photograph's reading exactly as it appears — near numbers in this family punish tidied-up transcriptions. State the condition you will accept, and the inquiry carries everything the desk needs.

Related pages

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  FANUC Encoders and Pulse Coders

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  FANUC Servo Motors