Baumfolder BAUM20: Pile Folder 1st Station (in 2005) - Manual (Page 54)

TP10243-3 PAGE 54
screws for the slitter shaft accessories facing out, so you
don't have to turn the shafts to get to the screws. OPERATING TIPS
Setup
When setting up a job on your folder, watch so the sheet
doesn't end up with either the RH or LH edge along the edge
of a fold pan or register plate. This could kick it over
causing inaccurate folding.
Brass Tipped Screws
When replacing screws in collars and various other
assemblies, be sure to note if they are brass tipped screws.
Using non-brass screws as replacements will cause scarring
of the shaft, making collars difficult to move.
Static Electricity
If you do not have an electrical static eliminator, here are
some ideas to help reduce static electricity:
• Make sure the machine frame is grounded.
• Try using static tinsel across the register table and
feeder.
• Locate the folder out of direct drafts such as doorways
and air vents.
• Cover jobs with plastic between the press and the folder
if much time will elapse before the job is to be run.
Cutting Blade Wear
To help extend the life of all cutting blades, check for
possible burrs on the mounting collar. Lay a sheet of emery
cloth on a flat surface and rub the collar around a few times
to remove any burrs. The blade will now rest flat against
the collar, giving a more even rotation.
Measuring Odd Thirds
When measuring odd thirds as needed for a Z-fold for
example, on an 11 inch sheet, lay your ruler on a diagonal
of 12 inches instead. Mark at four and eight inches, and
you will now be able to easily measure 1/3 of the sheet.
Pull-out Bands
Periodically check for wear on the rubber pull-out bands
on each slitter shaft. When each sheet passes through the
last rolls, there is another 1 3/4 inches left on the sheet
before it is completely out of the folder. At this point, the
only thing controlling the sheet is the pull out bands. If
they are worn or uneven, the sheet can twist after dropping
out of the rolls when travelling that last 1 3/4 inches.Be
sure when replacing these worn pull-out bands that you
replace the complete set, so you will always have an even
pull on both sides.
Slitter Shaft Setup
Here is an easy way to set up your slitter shaft accesso-
ries. Mark up a dummy sheet with the scores, perforations,
etc. locations. Roll through by hand and position your
slitter shaft accessories accordingly. Also, keep all set
TIPS FOR FOLDING
The following section contains a number of hints drawn
from practical experience for the setting up and adjustment
of folding machines.
Roller Setting for Accordian and Letter Folding
The rollers used for these types of folds must be set only
to single paper thickness. The folding rollers following the
final fold must, however, be set once more to the total
thickness of the paper passing through.
Processing Thin Printing Stock
It is essential that the folding rollers be adjusted with
maximum precision.
Lightweight printed stock is more easily folded when the
paper is slightly moist as this imparts a greater degree of
stiffness. For sheet transportation on the register table and
at the right-angle folds, as few marbles as possible should be
used and these should be of light weight.
When lightweight printed stock is being folded, the
folding machine should be started up as slowly as possible.
Only after the necessary precision adjustments have been
made should the machine speed be increased in accordance
with the paper. It is essential to ensure that the speed is
increased only to a point where quality is maintained.
Folding Roller Adjustment
Contrary to popular opinion, paper strips trimmed for
this purpose should not be inserted between the clamp
blocks of the Baumset. The strips should be folded accord-
ing to the required pattern and inserted with the folds.
Paper Grain in Letter Folds
With paper of up to 90 g/m, the three-directional letter
fold can be produced even if the grain is at right angles to
the fold. From 90 g/m upwards, better folds are produced if
the paper grain runs parallel to the fold.
Using Guide Marbles
The basic rule is that as few marbles should be used as
possible. Steel marbles should be used only when necessary
for the type of paper and the required fold. Conveyor tapes
last longer if unnecessary marbles are removed.
If stream delivery on parallel folding work is not
uniform, try using more marbles after the parallel folding
station.
A simple rule of thumb is that the thicker the folded
sheet becomes from station to station, the greater the load
exerted by the balls should be to facilitate sheet movement.