Motor underload

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The motor underload protection has tripped, indicating that the motor's current draw is significantly lower than expected given its operating conditions and commanded speed. This typically suggests a loss of mechanical load, a broken coupling, or an issue with the driven equipment. Running under severe underload can sometimes lead to inefficient operation or potential runaway conditions in certain applications.

• Motor is drawing significantly less current than expected for the operating conditions.
• Mechanical load is too light or absent.
• Incorrect motor parameters leading to under-estimation of required torque.
• Encoder feedback suggesting no load when one exists.
• Minimum torque setting too low.

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1. 1

   Inspect the mechanical load connected to the motor — confirm it is present and properly engaged with the motor shaft.

2. 2

   Check for any broken belts, damaged couplings, or other mechanical failures that would cause the motor to lose its intended load.

3. 3

   Verify the motor's current draw against the expected current for the application and the drive's underload threshold settings.