Shell thinning generally occurs on the inside of the dryer shells due to erosion caused by loose balance weights, siphons, etc. Thinning can be gradual across a wide area or may be present as localized grooves. Undetected casting defects may also enlarge. Thinning of the shell can lead to catastrophic rupture resulting in damage to large sections of the machine. Dryer heads may crack due to fatigue or chemical etching may occur due to harsh cleaning solutions. Dryer bolts may be affected in the same manner.
The D2S system scans and records velocity and time of flight information, insuring proper calibration at any point on the roll. The D2S also provides the flexibility and reporting capabilities of the Analyst software.
