Inline Versus Offline Inspection
There are various criteria converters must consider when selecting a web inspection system, beginning with which type to specify— inline, offline, or both.
On rewinders, there are two basic inspection systems available, according to Michael Simonis, president, Unilux, Inc. “One is video, which allows micro analyses, and the other is stroboscopic, which allows macro analysis.” Brian Ivens, manager, marketing and sales, Arpeco, adds that stroboscopic visual inspection is relatively inexpensive, but requires that the web be travelling at approximately 100 fpm for each one inch of label length in order to provide a suitable number of flashes per second to freeze the image.
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