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Stepper Motor Buzzing but Axis Does Not Move

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Power down, remove mechanical load, inspect belts, lead screws, connectors, motor wiring, driver current, and axis binding before commanding more movement.

Motion & MechanicsAdvanced16 min

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Ordered repair sequence

Step 1

Stop commands if the axis is colliding or the motor heats rapidly.

Step 2

Power off before plugging or unplugging a stepper motor.

Step 3

Move the axis by hand according to the manufacturer procedure and check for binding.

Step 4

Inspect belts, pulleys, lead screws, couplers, wheels, rails, and endstops.

Step 5

Reseat the motor and mainboard connectors with power disconnected.

Step 6

Check the cable through its entire moving path.

Step 7

Return custom current, microstep, and acceleration values to a known profile.

Step 8

Use manufacturer diagnostics or qualified service to separate motor and driver faults.

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