This article provides some recommendations to ensure prevent the zoom lens doesn’t suffer excessive from suffering wear prematurely.
Background
There are two major factors that contribute to excessive wear of the zoom lens on automated machines with multiple zoom stops.
initializing the machine frequently
changing the zoom stop unnecessarily often in an inspection program
Recommended Procedures
Reduce Initialization of the machine and zoom lens
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Measure all features for each zoom stop at once, without switching back and forth between zoom stops.A special procedure needs to be used when translating elements that include multiple zoom stops.