GBR Systems M-40, Operator'S And Service Manual

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M-4 OPERATOR & SERVICE MANUAL ISSUE 05/01 MAINTENANCE
SECTION C – PAGE 9
C.3 BIMONTHLY MACHINE MAINTENANCE DUTIES
1. Check the Condition of Perforation Knives. Inspect perforation knives by
looking at the quality of the perforation on the sides of folded documents.
This inspection is based on expected quality of the finished document
more than any precise setting. The perforation wheels at the exit of the
folder can be adjusted to increase or decrease depth of penetration.
Perforation depth is set at the factory to permit the perforated side of the
document to separate from the main body of the document with relative
ease. New perforation wheels tend to penetrate cleanly, with little or no
crushing. Worn or damaged wheels will produce less cutting of the paper
fibers, merely crushing the paper. This makes it increasingly difficult to
remove the perforated sides.
Perforating Knives
WARNING: Extremely sharp blades. Cutting
hazard. Keep hands away from slitter knives.
Remove power first. Never attempt to clean
rollers when folder is on.
2. Check document for square folds. Documents that are sent into the
folder exactly perpendicular to the folder rollers will fold perfectly square
provided the stop bar in the buckle plate is also square. The feeder’s
paper guide rails play an important role in the presentation of the
document to the folder. Inspection of the alignment table geometry is
possible by using plain xerographic paper. The paper is fed into the
alignment table as normal and the output is observed for square folding.
If the output has not been squarely folded, it is probable that the feed
conveyor did not present the document squarely. Screws that secure the
paper guide rails to the crossbars can be loosened. These permit the
operator to adjust the guide rails to their desired location and change the
angle of the document presentation to the folder.
Bad or Incorrect Fold
Note: When pre-perforated stock is used the folder will tend to fold on the
perforations even if the presentation is slightly angular. And if the document
stock has not been perforated squarely it may not be possible to fold it
square even with adjustment of the alignment sphere drive assembly. Be
sure the documents have been perforated correctly before making any
adjustment.
3. Check for centered document. The folder rollers, having been undercut
in specific places, require that the document be presented to the folder
exactly on center. If the document is not centered precisely the side glue
will not be located on the document in the correct position. Presentation
of the document may be adjusted by moving the paper guide rails.