Zooming Toward Quality

In addition, newer software can help prevent false defect alerts by overlooking changes caused by normal system operation, such as video image variance, he says.

Package printers should avoid cutting budget corners by forcing a narrow-web system onto a wide-web press. Thome has seen this attempted in the field as a reality of limited budgets, but warns that narrow-web systems' 2à to 3à field of view could be too small, and traverse speeds, sometimes 1à to 4à per second, may be too slow. "Wide-web inspection fares better with 7à to 9à fields of view, and systems should traverse at least 8à per second," he advises. Many systems, including BST's Eagle, traverse a meter per second.