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TROUBLESHOOTING
PROBLEM
Sheets stick together
particularly along sides.
Suction wheels picks
up double sheets.
Sheets stick together
Double sheet stop
reacts to single sheets.
Sheet twists after suction
wheel finishes feed-in.
Sheet leading edge
buckles on register or
lower sheets are being
pushed forward.
Sheets fails to run into the
buckle plate.
Sheets fails to re-emerge
from buckle plate.
TP10243-3
CAUSE
Inadequate ink drying, cut
with blunt guillotine blade.
Excessive suction.
Air blow improperly set
Set only to single paper
thickness.
Side Guide on register
set too far back.
Too few marbles at start of
side gage.
Suction gap too short.
If the leading edge of the sheet
is being buckled, the holder
tongue below the suction wheel
is too high; if too low, sheets
are pushed forward.
Dirty valve piston sticking.
Only at 1st buckle plate:
A curl in the sheet
can cause the leading-
edge to bend up or down
thus missing the upper or
lower buckle throat.
On all buckle plates: sheet
missing the buckle plate
underlips.
Sheet unable to buckle as
buckle space too small.
Folding rollers blunt or
clogged with ink.
Inadequate inside clearance
in buckle plate.
PAGE 52
REMEDY
Fan out thoroughly when
piling, increase blower air.
Reduce vacuum setting.
Increase air blow
Correct to double paper
thickness. Tighten lock nut.
Bring guide plate forward.
Increase number of marbles
if necessary.
Increase gap setting.
Adjust holder tongue
accordingly.
Clean.
Fit sheet deflector to 1st
buckle and fold in 3rd
buckle plate.
Advance lower buckle plate
lips accordingly.
Set lower buckle plate
lip further back.
Wash off rollers with the
type of rubberised-cloth
cleaning agent used in
offset work.
Increase clearance as
necessary.
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