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FANUC A860‑2109‑T302

Product Name: A860‑2109‑T302 Alpha‑i Series Spindle Pulsecoder (Spindle Encoder)
Product Introduction: FANUC A860‑2109‑T302 is high‑speed incremental spindle encoder for FANUC CNC system. It is installed on machine‑tool spindle shaft end, used to detect spindle real‑time rotation speed and angular position, providing feedback signal for spindle orientation, rigid tapping and synchronous machining function of CNC machine tool.
Category:
Description
Technical Specifications:

Maximum allowable mechanical speed: 10000 RPM

Resolution: 5000 PPR pulses per revolution

Power‑supply voltage: DC 5‑26 V, recommended DC 24 V

Working current: ≤150 mA

Signal output: RS‑422 differential line‑driver signal

Operating temperature range: ‑10 °C to +55 °C

Protection class: IP65 under correct installation condition

Shaft diameter: Φ15 mm

Mounting hole: 4‑M5 fixing screw holes

Functional Features:

High‑resolution incremental pulse output realizes accurate spindle‑speed and position feedback.

Supports high‑speed spindle operation up to 10000 rpm for high‑speed CNC machining.

Differential RS‑422 signal output has strong anti‑electromagnetic‑interference performance for industrial workshop environment.

Real‑time position feedback supports spindle orientation, rigid tapping, thread‑cutting synchronous control function of CNC system.

Compact structure for direct mounting on machine‑tool spindle assembly.

Application Scenarios:

FANUC‑system‑equipped CNC lathe, CNC milling machine, machining center, and other machine‑tool spindle‑position‑and‑speed‑feedback occasions.

Performance Parameters:

Angular feedback precision: ±0.01 °

Response frequency: 0‑300 kHz

Material Composition:

Outer housing: High‑strength aluminum‑alloy shell with surface oxidation‑resistant treatment.

Internal components: Optical grating‑disc, photoelectric receiving‑transmitting assembly, signal processing printed‑circuit‑board.

Shaft assembly: High‑precision steel rotating shaft and sealed bearing components.

Connector: Industrial circular locking‑type connector.

Structural Features:

Flange‑mount fixing structure with four‑M5 screw‑hole positioning.

Rotating shaft input structure for direct coupling with machine‑tool spindle.

Fully‑enclosed internal optical‑path chamber.

External industrial connector for signal‑cable connection.

Working Principle:

Machine‑tool spindle drives encoder internal grating‑disc to rotate synchronously. Photoelectric transmitting‑receiving unit reads light‑and‑dark slit signal on grating disc, converts light‑signal change into electrical pulse signal. After circuit processing, differential ABZ phase incremental pulse signal is output to FANUC CNC system. CNC system calculates spindle rotation speed and angular position according to received pulse quantity and phase relation.

Installation Requirements:

Fix encoder flange on machine‑tool spindle‑end mounting seat with M5 screws.

Control shaft coupling radial and axial offset within allowable tolerance to avoid additional shaft load.

Adopt FANUC‑specified shielded encoder cable for signal transmission.

Keep cable away from high‑power motor power cable during wiring.

Complete wiring operation under CNC system power‑off state.

Usage Notes:

Do not bear excessive radial and axial external load on encoder rotating shaft.

Forbid on‑site disassembly of encoder housing, which will damage internal optical‑path assembly and sealing performance.

Avoid long‑term liquid‑oil splashing and dust accumulation on encoder shell surface; wipe surface liquid and dust timely.

Excessive vibration will cause false‑pulse output, reduce vibration‑transmission to encoder during machine‑tool design.

Wrong wiring will damage internal circuit; strictly follow official wiring‑diagram for connection.

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