83
SUCTION FEED PROBLEMS
Problem
Cause
Action
DOUBLE FEEDS
Incorrectly positioned sucker
plugs
Check the positioning of the
plugs (see p.41)
Porous paper
Refer to section on porous
paper (see p.44)
Too little edge flick
Increase the edge flick depth by
lowering the control (see p.42)
The tray is too high
Lower the tray (see p.45)
MISS FEEDS
The edge flick is set too deep
Reduce the edge flick depth by
raising the control (see p.42)
Sucker cups are damaged or
are incorrectly seated
Check and replace/refit any
faulty sucker cups (see p.75)
Insufficient suction for heavy/
thick stock
Remove the plugs from all suck-
ers
Tray is too low
Adjust the tray height accord-
ingly (see p.45)
TRAILING FEED
(On a trailing sheet the machine
stops immediately. You need to
look carefully to identify which of
the following is the cause. The
faulty set can be inched through
by touching and holding
INCH
)
Late feeding double sheet
Treat as double feed above
Slow feeding sheet
Treat as miss feed above
Slow feeding during test set
causing incorrect calibration
Run another test set by touching
followed by
TEST SET
followed
by
PAPER JAM
Sheet is jammed in the paper
path
Locate the sheet and either pull
it out or
INCH
it through
Sheet is only half feeding
Treat as miss feed above
CREASED CORNERS
Soft paper is being 'sucked up'
into the sucker
Fit open plugs to the outer most
suckers on the sheet (PN 310-
537, Plastic Mould (VSCN) Man-
ifold plug open)
The corners of the sheet are
catching on the outer edge flicks
Remove the outer edge flicks
(see p.46)
’BIN OVERLOAD' MESSAGE
AND SMALL GREEN LIGHT IS
BLIPPING (• • • •)
An obstruction in the bin is pre-
venting it from lifting correctly
Check and remove any obstruc-
tions. It may be that the stock has
not been pushed fully forward
into the bin
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