In a robot arm, a motor bends the elbow joint based on a controller signal. What component directly converts this signal into movement?

Explanation

Actuators are like muscles in a robot arm. They receive electrical signals and turn them into physical movement. When the controller says “bend elbow,” the actuator makes it happen.

Sensors detect position and send feedback to the controller. Memory stores programs and data. The manipulator is the entire arm structure, not the specific moving component.

Without actuators, robot commands would be instructions with no action. Actuators bring robots to life through movement.