What is the role of encoders in FANUC robots?

The role of encoders in FANUC robots is primarily to measure the position and movement of the robot's joints and end effector. Encoders provide feedback on the exact position and velocity of the robot's movements, which is critical for precise control and operation. This feedback allows the robot controller to make adjustments in real-time to ensure accurate execution of programmed tasks.

By receiving position data from the encoders, the control system can effectively monitor the robot's performance, leading to improved accuracy in tasks like assembly, welding, or painting. This capability is vital for applications where precision and repeatability are essential.

The other options do not accurately describe the function of encoders in robots. Speed enhancement is more about the design and motor specifications, controlling the power supply relates to energy management rather than movement feedback, and aesthetic design is unrelated to the technical role of encoders in robotic systems. Thus, measuring position and movement stands out as the central function of encoders in FANUC robots.