This is a normal & intentional behavior. The Narwal robot vacuum automatically adjusts side brush speeds based on cleaning needs:
- Edge Cleaning Boost – The inner side brush spins faster when working along walls, ensuring debris is swept out efficiently from corners.
-
Wet/Dry Separation Control – During Vacuum and Mop task in a Zigzag, the side brush near the uncleaned area will operate normally, while the side brush near the cleaned area will retract into the robot's chassis. This ensures that the dust-laden sweeping mechanism does not come into contact with the wet, clean floor, preventing cross-contamination.
This adaptive brush system maintains thorough cleaning while preventing mess dispersion.
Video for Reference: