Fanuc A06B-0075-B403 AC Servo Motor | 20-bit Encoder | 3 Nm Torque

Fanuc A06B-0075-B403 AC Servo Motor | 20-bit Absolute Encoder | 3 Nm Torque | 3000 RPM

What is the Fanuc A06B-0075-B403 AC Servo Motor

A06B-0075-B403 is a Fanuc AC servo motor designed for precision axis motion control in CNC machines and industrial automation systems.

It belongs to the Fanuc A06B-0075 servo motor series and is engineered to deliver stable torque output, accurate positioning, and reliable rotational motion for machine tool operations.

The motor integrates a 20-bit absolute optical encoder, allowing the system to retain position data even after power shutdown. This eliminates the need for homing cycles and improves operational efficiency in CNC machining environments.

Servo motors like the A06B-0075-B403 are commonly used to control feed axes, robotic joints, and automated motion systems where high positioning accuracy and consistent torque are required.

Technical Specifications

Key Performance Attributes

Continuous Torque Output

The motor provides 3 Nm continuous torque, allowing stable cutting forces during CNC machining operations. Continuous torque determines how much rotational force the motor can maintain during long machining cycles.

Peak Torque Capability

Peak torque reaches 9 Nm, enabling rapid acceleration and deceleration during axis movement. This is important for high-speed positioning and dynamic machine tool operations.

Rated Speed

The rated speed of 3000 rpm allows fast feed motion while maintaining accurate position control in CNC applications.

Absolute Encoder Feedback

The integrated 20-bit absolute encoder provides more than one million position counts per revolution. This high resolution allows extremely precise positioning for CNC axis control and robotic motion.

Industrial Protection Rating

The IP65 protection rating prevents dust and coolant ingress, which is essential for operation in industrial machining environments.

How AC Servo Motors Work in CNC Machines

AC servo motors convert electrical signals from a servo amplifier into controlled rotational motion.

In CNC systems:

1. The CNC controller sends a motion command to the servo drive.

2. The servo drive supplies controlled current to the motor.

3. The motor rotates the axis ball screw or drive mechanism.

4. The encoder continuously sends position feedback to the control system.

This closed-loop control system allows CNC machines to maintain extremely accurate axis positioning.

Typical Applications

CNC Machining Centers

The motor is frequently used for feed axis control in CNC milling machines, turning centers, and machining centers.

Industrial Robotics

Servo motors control robotic joint movement in pick-and-place automation systems and assembly robots.

Automated Manufacturing Equipment

Industrial automation systems rely on servo motors for accurate motion control in production lines.

Multi-Axis Motion Systems

Machines that require synchronized axis movement use servo motors to maintain positional accuracy and repeatability.

Compatibility

The A06B-0075-B403 motor is designed to operate with compatible Fanuc servo amplifiers and CNC control systems.

Common system compatibility includes:

• Fanuc 30i control systems

• Fanuc 31i control systems

• Fanuc αi series servo drives

System compatibility should always be verified according to the machine configuration.

Core Exchange Requirement

This motor is supplied with a core exchange requirement.

Customers purchasing the A06B-0075-B403 must return their existing motor core after receiving the replacement unit. Core exchange programs support component refurbishment and help maintain availability of industrial spare parts.

Repair Services

Repair services are available for this servo motor model.

Typical repair procedures may include:

• encoder diagnostics and calibration

• bearing replacement

• rotor and stator inspection

• shaft alignment inspection

• electrical testing and load verification

Repairing an existing unit can extend service life and reduce replacement costs.

Frequently Asked Questions

What is the difference between A06B-0075-B403 and B103

The B403 variant provides higher continuous torque compared to the B103 version, making it more suitable for heavier axis loads and demanding machining operations.

What encoder is used in this motor

The motor uses a 20-bit absolute optical encoder, which provides high-resolution position feedback and eliminates the need for homing after power restart.

Does the motor require additional cooling

Under standard industrial conditions the motor operates with passive cooling. In high duty cycle environments additional forced-air or liquid cooling may be implemented.

What machines typically use this servo motor

This motor is commonly used in CNC machining centers, industrial robotics, and automated manufacturing systems requiring accurate axis motion control.