How should you respond to an overcurrent in a joint during jogging?

• A. Stop motion, inspect the joint/drive, and reset after addressing the cause.
• B. Ignore and continue jogging.
• C. Increase speed to test the joint tolerance.
• D. Replace the entire robot.

Answer: (A)

An overcurrent in a joint during jogging signals the servo drive is protecting itself from an overload. The appropriate response is to stop motion, inspect the joint and its drive, then reset only after addressing the cause. High current can come from a mechanical bind, obstruction, misalignment, faulty wiring or connector, encoder issue, or a failing motor or drive. Stopping quickly reduces the risk of overheating and damage to the motor, drive, or gearing, and gives you a chance to find what triggered the fault.

Start by safely halting the robot, then inspect the joint and surrounding mechanism for obvious jams or binding, and check for obstructions. Verify that cables and connectors are intact and that the joint moves freely without unusual resistance. If you identify a simple issue, clear it, recheck the drive status, and address any wiring or mechanical problems. After resolving the cause, perform a proper reset of the fault and attempt a controlled restart of jogging, ideally at a very slow speed to confirm stability.

Continuing to jog or increasing speed would only raise current and risk further damage. Replacing the entire robot isn’t the first step; the fault is typically in the drive or the mechanical system and should be resolved locally.