Robot lawnmower vibrates excessively, especially when the blade starts or stops.

Safety first: Turn OFF the mower, remove the battery, and wear gloves before touching the cutting system.

• Check blade count: Ensure all NAC blades are present and correctly installed. Replace any missing blades and screws.
• Inspect disc: Rotate the blade disc and look for wobble or bends. Replace the disc if it is not perfectly flat.
• Clean disc: Remove any caked grass or mud from the disc to eliminate uneven weight.
• Use correct hardware: Only use the original NAC screws and blades supplied for your model to maintain balance.

Warning: Persistent vibration can damage bearings and electronics. Do not continue using the mower until the cause is corrected.