What is the primary role of a Faro arm or laser tracker in robotics?

• A. Gripper force control
• B. Path planning
• C. High-precision external measurement to determine robot pose relative to world coordinates
• D. Vision enhancement

Answer: (C)

The main idea is external, high-precision measurement used to pin down the robot’s pose in a fixed world frame. A Faro arm acts like a portable coordinate measurement machine—you move it around and measure exact points or read a probe’s coordinates, giving precise 3D data in a known reference. A laser tracker does something similar by tracking a retroreflective target with a laser, delivering accurate position (and often orientation) data relative to a fixed origin. In robotics, this external metrology is used to calibrate the robot, verify accuracy, and align the robot’s actual pose with its modeled pose in world coordinates. This capability is essential for tasks requiring tight positional accuracy and is not about gripping force, path planning, or vision enhancement.