Which statement about the deadman switch during manual jogging is true?

• A. At least one deadman switch must be held in the center position for the duration of manual motion.
• B. It must be held in the right position.
• C. It is optional.
• D. It must be released during motion.

Answer: (A)

During manual jogging, the deadman switch serves as an active safety control: the robot will only move while you are actively holding the switch in the required position. Keeping the switch in the center position for the entire motion ensures a definite, deliberate command is being given and that motion stops immediately if you release it. This immediate-stop behavior is a key safety feature, preventing unintended movement if your hand slips or you need to react quickly. So, the statement that you must hold at least one deadman switch in the center position for the duration of manual motion captures how the safety interlock functions during jogging. The other options contradict this safety principle: motion isn’t allowed to continue without you actively holding the switch, and claiming it’s optional or that you must release it during motion would undermine safe operation.