Watkiss Vario, Operating Manual

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17
If an offset is required, it is usual for the bottom sheet of
the set to lead: Select a negative offset when feeding to
the rear of the Vario and a positive offset when feeding to
the front of the Vario.
A small offset can make jogging more effective when
using a booklet maker.
DETECTOR POSITION
The sheet detector measures 15.2mm (0.6") from the feed
edge of the sheet and then takes a reading. If the edge
of a particularly dark or solid area of print is in this area it
can cause detection problems. The
DETECTOR POSITION
can be adjusted so that it looks at a different part of the
sheet. This affects all the bins in the collator.
TOLERANCE:
Changing
TOLERANCE
to
x2 COARSE
al-
lows for more variation in the detector readings. This
prevents false errors being reported when there are
variations in the paper or ink density. The default setting
is
x1 NORMAL
.
The Vario allows for some variation in the paper or ink
density, and constantly changes the range of values it will
accept by working out an average value for previous
sheets. Increasing Tolerance to
x2 COARSE
will only be
necessary where there are larger variations in stock.
DOUBLE DETECTION:
Under unusual circumstances,
e.g. there are large variations in stock, it may be neces-
sary to turn off
DOUBLE DETECTION
. This affects all the
bins in the collator. Miss feed detection is unaffected.
Before switching off double detection, first try setting
TOLERANCE
to
x2 COARSE
.
FEED CLUTCH FEED CLUTCH
adjusts the clutch feed length for all bins
during the test set only. Increasing the value will cause
the feed wheels to drive the paper for longer, which can
prevent sheets from slipping. The value can be reduced
to prevent excessive pre-feeding of the next sheet in the
bin.
Optimising the clutch feed length for non-standard paper
lengths will produce a more accurate test set, which in