There are some solutions for common fault of baby diaper machine. A. Synchronous wheels loose; Synchronous belts fall off. Check: synchronous wheel taper sleeve, synchronous belt. Solution: Align and fix synchronous wheel taper sleeve, synchronous belt. B. Synchronous wheel is not fixed, synchronous belt fracture. Check: synchronous wheel taper sleeve, synchronous belt. Solution: Make replacement of synchronous wheel taper sleeve, synchronous belt. C. Transmission shaft fracture, coupling loose or damage. Check: driving shaft, coupling. Solutions: Replacement of axis, coupling or align and tighten coupling.