Paxar 656 / 636 user manual Mechanical Trouble Shooting, Stock

Mechanical Trouble Shooting

Stock

Problem	Probable Cause		Corrective Action
Stock will not roll or jumps	1) Incorrect adjustment of unwind	1)	Be sure stock roll is as flat as
	web guides		possible and does not extend over
			core.
		2)	Adjust rear web guide to 31/32"
			(24.6mm) from case surface to
			guide surface touching roll.
		3)	Adjust outer web guide to touch
			stock roll but not pinch the roll.
Machine fails to stop at end of roll.	1) Incorrect adjustment of stock-out	1)	Adjust stock-out switch arm to
	switch trigger arm.		approximately 3/4" (19mm) from
			back side of stock when threaded
			through machine.

Stock does not pull smoothly through printhead module.

1) Web guide in sensor plate	1) Adjust moveable web guide to
incorrectly adjusted.	touch outer edge of stock with rear
	edge touching rear web guide. Do
	not pinch.

2)Stock is slipping in drive or drive pressure is uneven.

2)Remove stock from drive rollers. Using a piece of stock the same thickness as the stock being run as a "feeler" gauge, adjust set screws in drive endplates clockwise until "feeler" gauge barely slides between rollers with pressure lever closed. Rotate set screws clockwise an additional 1/2 - 3/4 turn. Rethread and operate. Minor adjustment can now be made to cause stock to run 31/32" (24.6mm) from upright frame.

Users Manual Model 656/636 Mechanical Trouble Shooting • 53