Paxar 676, User Manual

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Mechanical Trouble Shooting
Mechanical Trouble Shooting
Stock
Problem Probable Cause Corrective Action
Stock will not roll or jumps 1) Incorrect adjustment of unwind
web guides
1) Be sure stock roll is as flat as possible and does
not extend over core.
2) Adjust web guides to touch stock roll but not
pinch the roll.
Machine fails to stop at end
of roll.
1) Incorrect adjustment of stock-out
sensor.
1) Adjust contact strip so that a “click” will be
heard when supply roll is lifted.
Stock does not pull
smoothly through
printhead module.
1) Web guides on unwind arm too
tight.
1) Adjust web guides to touch outer edges of stock
with minimum pressure required to keep stock-
out switch closed.
2) Web guides on decurler arm too
tight
2) Adjust collars on decurler bar to touch edge of
stock.
3) Stock is slipping in drive or drive
pressure is uneven.
3) 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 the same distance from center frame
as is measured at unwind arm.