Which statement about the World Frame is true?

• A. The World Frame is the basis for all taught positions and frames within the robot.
• B. The World Frame is used only during calibration
• C. The World Frame is the same as the Tool Frame
• D. The World Frame rotates with the robot base

Answer: (A)

The World Frame is the fixed reference in the robot’s environment, and it serves as the basis for all taught positions and frames because you define and store positions with respect to this stable coordinate system. The Tool Frame, by contrast, is attached to the end effector and moves with the robot, so it changes as the arm moves. The World Frame isn’t used only during calibration; it’s the common reference you rely on when teaching and programming, providing consistency across moves. It does not rotate with the robot base—if the base moves, the world frame stays fixed in space, while the connection to the tool frame changes as the arm moves. It’s also distinct from the Tool Frame.