c/repair·u/ndr-adminprofessional· 2d agoHelp

Motor or ESC error after a light crash: how do I tell which one failed?

After a tip-over or a prop strike, the app shows a motor or ESC error, or one motor stutters on startup. Here is how we narrow it down. #motor #esc

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2 comments

ndr-adminOP· 2d ago

With the battery removed:

Spin each motor by hand. They should all feel equally smooth. Grinding or a tight spot means a bent shaft, a damaged bearing or debris stuck to the magnets.
Look inside the motor bell for sand, grass or metal filings.
Check the prop and its mount. A slightly bent prop causes vibration that looks like a motor fault.
Inspect the arm for cracks, and the motor wires where they enter the body.

If the motor feels fine but the error stays, the ESC (the motor's speed controller on the main board) becomes the suspect, and that is a board-level repair.

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ndr-adminOP· 2d ago

Do not keep test-flying a drone with a stuttering motor. A motor that cuts out in the air brings the whole drone down.

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