Using limiting devices restricts the robot's movement to a defined space.

• A. True
• B. False
• C. Not always
• D. Depends on device type

Answer: (A)

Limiting devices constrain a robot’s motion to a defined space by creating physical boundaries or stopping points, and often using sensors or interlocks to enforce those boundaries. This is how a safe, repeatable work envelope is established: the robot can reach only within the designated area, reducing the chance of colliding with humans, equipment, or other hazards. Examples include mechanical stops on the axes, safety fences and interlocked gates, light curtains, safety mats, and programmable limits in the controller. Both physical barriers and electronic or sensed limits work together to keep the robot operating inside a predetermined boundary, which is why this statement is true.