What is the primary function of a FANUC robot's servo motor?

The primary function of a FANUC robot's servo motor is to control the robot's movements precisely. Servo motors are designed to provide accurate control over position, speed, and acceleration, which are essential for the robot to execute specific tasks with high precision. They accomplish this through feedback mechanisms that constantly adjust the motor’s position, ensuring that the robot's joints and end effector move exactly as intended.

This precision is critical in various applications, such as assembly, welding, and painting, where even minor deviations can lead to defects or inefficiencies. By using servo motors, FANUC robots can achieve smooth and controlled movements, which increases their effectiveness and reliability in industrial settings.

The other options, while they may relate to various functions of the robot system, do not capture the primary role of the servo motor as precisely controlling the movements of the robot. For example, although assisting with payload lifting is essential for a robot's overall functionality, it is not the fundamental role of the servo motor. Similarly, monitoring environmental changes and providing power to the robot are not functions associated with servo motors; rather, they pertain to other components within the robot's architecture.