Safeguards must be established for which operations in a robot system?

• A. Teaching
• B. Maintenance
• C. Operating
• D. All of the above

Answer: (D)

Safeguards are needed for every phase where humans interact with a robot: teaching, maintenance, and operation. When teaching or programming, the robot can move while a person is within the work envelope, creating risks from unexpected motion, pinch points, or crush hazards. Protective measures such as interlocked access, controlled turning on and off, safe programming modes, and clearly defined safe speeds help ensure a person isn’t exposed to dangerous robot actions during setup or changes.

During maintenance, workers may need to service or repair the robot and could be exposed to hazardous energy or unexpected movement. Safeguards here include isolating energy sources (lockout/tagout), verifying de-energization before work, safe access procedures, and ensuring moving parts cannot start unexpectedly while someone is servicing the system.

In normal operation, the robot’s moving parts can still pose collision or impact risks to nearby personnel or bystanders. Protective devices like fences, safety-rated interlocks, light curtains or mats, emergency stop devices, and clearly established safe operating procedures reduce the likelihood and severity of contact with the robot.

Because each phase presents distinct hazards, safeguards must be established for all of these operations to comprehensively protect people and ensure safe, reliable robot performance.