Watkiss Vario, Operating Manual

Page: 48 / 110

44
the stack is loaded neatly and square, and then place the
magnetic sidelays on all three sides.
Make sure that the loaded bins are selected (remember
that the bins are automatically selected as you load them,
before you run the test set). Set the drive speed to 80%,
the air separation to about 30% and the sets per hour to
about 2,000. These settings can be adjusted to suit the
job if required. The air should just separate the top two
or three sheets from the stack whilst the machine is idling.
If necessary the air can be individually controlled for each
bin by using the taps on the rear of the bins.
Touch to feed a single test set. If the test set is
satisfactory touch again to run the job. When the job
is running satisfactorily, increase the sets per hour if
required.
Whenever feed difficulties are encountered we always
recommend that you follow two golden rules:
• Switch off all the bins except one and look at only one
bin at a time.
• Ensure that only one 'remedy' is tried at a time. This
will make it much easier to identify the solution.
Porous papers
Porous papers are more inclined to feed doubles as the
suction sucks through one sheet and onto the next. This
can be overcome by checking that the plugs are correctly
inserted (see p.47). Close the tap on any sucker where
an open plug is fitted.
Deformed sheets
Where the sheets are deformed such that the stack has
high and low points, not all suckers will be able to make
contact with the stack. Therefore the taps should be
switched off at either all the 'high spots', or alternatively
at all the ’low spots’.
Switching Bins On & Off
Before a test set is produced, individual bins will auto-
matically switch on and off as they are loaded and
unloaded. Bins can also be manually selected by
pressing the red button alongside the bin. In addition,