The FANUC A20B-8200-018 is an encoder-related replacement component identified in industrial parts records as a FANUC pulsecoder / rotary encoder for servo-motor feedback applications. It is used in a compatible feedback system to detect motor rotation and provide position or speed information to the servo-control equipment.

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Product Details

Brand: FANUC
Part Number: A20B-8200-018
Alternative Format: A20B8200018
Product Type: Pulsecoder / Rotary Encoder Component
Primary Function: Motor rotation and feedback-signal detection
Application: Compatible FANUC servo-motor feedback configurations
Product Series: A20B-8200
Availability: Contact us for current stock and lead time
Core Exchange: Please inquire
Repair Service: Please inquire
Testing: Inspected and function tested in an applicable encoder-feedback configuration

Encoder Feedback Function

The A20B-8200-018 FANUC encoder is associated with the feedback path used by a servo-control system. Encoder feedback allows the control equipment to compare commanded movement with detected motor rotation and make corrections for controlled axis motion.

This component may be considered when testing confirms an encoder-side fault, damaged feedback electronics, unstable signal transmission or physical damage to the original unit. An encoder alarm does not automatically prove that the A20B-8200-018 is defective; the feedback cable, connectors, servo amplifier, power supply and control settings should also be checked.

Exact Model Identification

The complete reference A20B-8200-018 should be matched exactly. Public product records use this three-digit ending, so it should not be automatically changed to A20B-8200-0180.

Similar FANUC references including A20B-8200-019, A20B-8200-0190, A20B-8200-025 and A20B-8200-056 may appear in searches for related encoders. Similar numbering, size or appearance does not establish interchangeability.

Publicly accessible sources do not consistently document the resolution, absolute or incremental detection type, electrical interface, connector pinout or applicable motor series for A20B-8200-018. Confirm these details from the original encoder, complete motor nameplate, machine documentation and physical connector arrangement before purchase.

Compatibility Check

Before ordering, please verify:

• Exact marking: A20B-8200-018
• Any additional revision or board-edition marking
• Complete servo-motor or spindle-motor model
• Existing encoder housing and mounting arrangement
• Connector type, pin count and cable orientation
• Feedback cable part number
• CNC and servo-amplifier configuration
• Current pulse-coder or servo alarm information
• Clear photographs of both sides of the original component

Do not select this encoder only from the A20B-8200 series number. Similar encoder components can differ in feedback type, mechanical installation, connector arrangement and supported motor configuration.

Replacement Note

Encoder replacement should be performed by qualified maintenance personnel with machine power safely isolated. Depending on the original feedback system, replacement may require reference-position recovery, parameter verification or an absolute-position setup procedure. Follow the machine builder’s and applicable FANUC maintenance instructions before returning the axis to production.

Sales & Support

REACO CNC supplies tested FANUC A20B-8200-018 pulsecoder encoder components for industrial maintenance and replacement requirements. Please send photos of the exact model marking, encoder assembly, connector and motor nameplate so our team can check identification before shipment.

Worldwide express delivery is available through DHL, UPS and FedEx. A testing video can be provided upon request. Contact REACO CNC for price, availability, lead time and technical identification support.