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One part of the design is not correctly positioned with another.

Causes: 

– Plates not mounted in register;

– Incorrect web tension; 

– Incorrect drive-roller adjustment;

– Excessive web temperature;

– Press register compensator not centered;

– Idle rollers dragging or running intermittently;

– Press out of alignment;

– Variations in substrate gauge;

– Incorrect (damaged) drive gear or journal;

Solutions:

– Remount plate in register. Review plate mounting and make-ready procedures. Check plate thickness, dispro and relief depth. Check tape thickness;

– Adjust tension controls appropriately for the substrate being printed;

– Check drive roll parallel for constant side-to-side pressure and centre wear condition;

– Reduce dryer temperature;

– Centre individual advance/retard running registers and side-to-side register compensators before manually keying in job register;

– Replace or lubricate idle roller bearings;

– Realign press;

– Replace substrate;

– Replace drive gear or journal.

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