Take The Right Path

Converters who are printing, slitting, or converting materials that are guided by using a printed line on the web can benefit from a feature BST Pro Mark calls the "watchdog." It is essentially a fail-safe for missing print, Thome points out. With this feature on a guiding device, when the printed line used for guiding is not there due to bad splices or missing print, an edge sensor automatically takes over momentarily, or until the line reappears, and guides the substrate. Without this feature, the web guide is lost and directs the web inaccurately to one side of the machine, producing waste.