Failure Diagnosis System for a Ball-Screw by Using Vibration Signals

Figure 11

Wavelet transform of normal and defect signals for one reciprocation of ball-screws during 4 s when the defect is at the center of screw shaft.

(a) Detail (level 1: 768~1536 Hz)

(b) Detail (level 2: 384~768 Hz)

(c) Detail (level 5: 48~96 Hz)