Why is frame selection (World/Base vs Tool) important for robot motion?

• A. It defines the reference for a pose and tool orientation, affecting path and orientation.
• B. It changes the robot's color.
• C. It changes the physical dimensions.
• D. It only affects the display on the pendant.

Answer: (A)

Frame selection defines the reference the robot uses to interpret every pose and orientation command. When you work in the World/Base frame, a commanded position and orientation are tied to a global coordinate system anchored to the robot’s base, so the same numbers place the end effector at a specific spot with a specific world-facing orientation. In the Tool frame, those same numbers are taken relative to the tool’s own axes, so the end effector moves along the tool’s axis and the tool’s orientation changes with its own frame. Because the robot must reach the commanded pose, the chosen frame directly changes the path the joints take and the final orientation of the tool at each point. So frame selection is about how the pose is defined and how the tool is oriented, which in turn shapes the actual motion. The other options don’t affect motion—color, physical size, or what’s shown on the pendant don’t change how the robot moves.