a860-0309-t302
FANUC Encoder A860-0309-T302
A860-0309-T302 is an encoder from the seller's shop listings — an A860 feedback device for a FANUC servo motor. This page records the listing and the matching discipline that feedback parts demand.
What A860-0309-T302 is
A860-0309-T302 is listed by the seller's shop as an encoder: a rotary feedback device that mounts at the rear of a FANUC servo motor and reports the motor's position to the drive chain. It belongs to the encoders family, the A860 shelf where the catalogue groups encoders, pulse coders and the handwheel under one prefix.
Feedback devices are matched parts. The number identifies the device exactly, and the device belongs with the motor it was specified for — which is why every page in this family, this one included, talks about the motor pairing as much as about the part itself.
Where A860-0309-T302 works
The encoder closes the servo loop: the servo amplifier drives the motor, the encoder reports where the motor actually went, and the control corrects. When the reporting fails, the axis alarms, drifts or refuses to reference — symptoms that also arise from cabling and from the amplifier's feedback input, which is why a feedback inquiry that describes the symptom earns a better first answer than one that only names the part.
The pairing question is settled by numbers, not by appearance: the motor's number and this device's number together confirm the match. The blog guide on pulse coders and encoders explains what to compare, and the desk applies the same checks to every A860 order.
Condition options for A860-0309-T302
The shop listing establishes the device's identity; its shelf condition is stated on inquiry, across the seller's normal range. Encoders are small, sealed and long-lived, which makes the used end of the range respectable for this family — provided the unit is tested, which is the point the next section covers.
The condition words and warranty that stand behind them are the catalogue's usual ones, set out on the used FANUC parts page: stated condition, test before dispatch, 3 months of seller warranty on a used unit, 1 year on a new one.
Testing A860-0309-T302 before dispatch
A feedback device is tested by turning it and watching what it reports: the test bench run confirms the device produces its signals cleanly through rotation, which is the only test that means anything for an encoder. A device that reports intermittently is a failed device for ordering purposes, however clean it looks in its box.
If the buyer's own A860-0309-T302 is the suspect rather than the confirmed fault, the repair desk can assess it — though for feedback parts the bench verdict most often separates a device fault from a cable fault, and either verdict saves the buyer from ordering the wrong half of the chain.
Ordering A860-0309-T302
Quote the number exactly as labelled — A860-0309-T302, T-suffix included — and add the number of the motor it will mount to. If the motor number cannot be read, name the machine and the axis; the desk will work the pairing from the machine side. State the condition you will accept, and the inquiry is complete.
Related pages
Send an inquiry
Send the part numbers you need, or the number of a unit you want assessed, with the machine each belongs to. One desk answers for the shelves and the bench.
Open the inquiry form