FANUC A860-0346-T041 Serial A Pulse Coder Encoder for AC Servo Motor Feedback

The FANUC A860-0346-T041 is a Serial A pulse coder designed for position and speed feedback in compatible FANUC AC servo motor systems.

The encoder is installed on the rear of the servo motor and detects motor rotation during machine operation. Its feedback signals are transmitted through the encoder cable to the connected servo amplifier and CNC control system.

This feedback allows the drive system to monitor shaft position, rotational speed, and direction for closed-loop servo-axis control. The encoder is intended for defined FANUC motor and controller configurations rather than general-purpose external encoder applications.

The A860-0346-T041 uses a D-Sub-style encoder connection. Before replacement, the original motor model, connector arrangement, mounting interface, encoder cable, feedback type, and CNC parameter configuration must be checked carefully.

This page should describe only the A860-0346-T041 Serial A pulse coder. The A860-0310-T111 is a separate 10000-pulse encoder model and should have its own product page.

This product is a motor feedback encoder. It should not be described as a servo motor, servo amplifier, spindle amplifier, CNC controller, power supply module, or encoder circuit board.

Key Features

Serial A pulse coder configuration

Motor-mounted encoder design

Position feedback for servo control

Speed feedback for closed-loop regulation

Designed for compatible AC servo motors

D-Sub encoder cable connection

Suitable for CNC servo-axis systems

Exact-model replacement component

Compact motor feedback assembly

Industrial machine-tool application

Typical Applications

CNC machining centers

CNC milling machines

CNC lathes

Grinding machines

Servo-controlled machine axes

Industrial positioning systems

AC servo motor maintenance

CNC encoder replacement

Machine-tool repair projects

Installation Notes

Confirm the exact model A860-0346-T041 on the original encoder label before replacement.

Verify the following information:

Servo motor model

Encoder mounting arrangement

Motor shaft interface

Connector type

Encoder cable

Feedback configuration

CNC parameters

Reference-position settings

Do not replace the encoder based only on external appearance. Similar A860-series pulse coders can use different feedback systems, connectors, resolutions, and motor interfaces.

Disconnect machine power before removing the encoder. Protect the connector and internal electronics from oil, dust, impact, and electrostatic discharge.

After installation, verify motor feedback, axis direction, servo alarms, reference return, position accuracy, and machine parameters.

FAQ

Q

What type of product is A860-0346-T041

A

It is a Serial A pulse coder used for feedback on compatible FANUC AC servo motors

Q

Where is this pulse coder installed

A

It is installed on the rear feedback section of the servo motor

Q

What feedback does it provide

A

It provides motor position speed and rotation feedback to the servo control system

Q

What connector does it use

A

Available product references identify a D-Sub encoder cable connection

Q

Is A860-0346-T041 a servo drive

A

No it is a motor feedback encoder and does not power or control the motor by itself

Q

Is A860-0310-T111 the same product

A

No A860-0310-T111 is a different 10000-pulse encoder model and should be listed separately