Industrial Robotics Troubleshooting — real-world interview & field troubleshooting questions with clear, practical answers. Tap any question to open its answer. Showing the first 70 questions free. The complete 150-question set is available as a PDF below. Robot Power, Controller & Startup Q1 The main power supply has a problem: the robot controller does not power ON. How will you troubleshoot it? Answer First check incoming voltage, main isolator, MCB/fuses, control power and loose terminals. Then restore the correct supply, replace the correct-rated fuse if required, tighten connections and verify stable control voltage. Confirm the fault is cleared and run a controlled test before returning the robot to normal production. Q2 The emergency-stop circuit has a problem: the controller powers up but the robot cannot be enabled. How will you troubleshoot it? Answer First check all E-stop buttons, safety relay status, gate signals and reset feedback. Then release the act...