APPLICATIONS
24
8 When running large jobs of more than 25 copies, split the job into
multiple groups of 25 sheets maximum. That is, run 25 copies of
side 1, then run 25 copies of side 2.
9 Heavy-weight papers (greater than 28 lb bond (105 gsm), coated
papers, and transparencies should not be used for two-sided
copying. Frequent jams and image quality problems are likely
with heavy-weight and coated papers. Duplexing of
transparencies will cause damage to the copier/printer.
Hints, Tips & Testing Results
Xerox testing has shown the following:
•
All color copiers/printers experience a higher jam rate when
performing duplex copying. Paper jams can be caused by the
curl created when running the side 1 image. This unpredictable
side 1 curl is the main reason that heavy-weight and coated
papers cannot be recommended for two-sided copying.
•
Another cause of increased jams is the contamination of the
feed rolls with fuser oil when running a large number of duplex
copies. This contamination may require more frequent cleaning
of the rollers. Your Xerox representative can give you
information on performing these cleaning procedures (order
number 700P98965). To help reduce this contamination
problem, and improve feeding reliability, mix one-sided copying
jobs with two-sided copying jobs when possible. During large
Duplex jobs, periodically run 5 blank sheets from the Paper Tray
Bypass in the Black Mode to help keep the feed rolls clean.
•
Image quality on side 2 will usually be equal to the side 1 image,
but is more likely to have image mottle/light area problems
caused by slight waviness in the paper and variable toner
transfer. Both of these factors are greatly influenced by the
paper's quality. This is another reason that heavy-weight and
coated papers are not recommended for duplexing.
•
Most two-sided copying can be done using the Standard Side 1
or 2 button on the Paper Type (Bypass) sceen. To make
Duplex copies with this method:
Copy the first side from any paper source using the basic
procedures for normal copying.
Load the side 1 imaged sheets in the Paper Tray Bypass. (Use
steps 6 through 9 from the Steps for Success section.)
Select the Standard Side 1 or 2 button on the Paper Type
(Bypass) screen, if it is not already selected as the default
setting. Then run side 2.
If you experience a high jam rate or are not satisfied with the
image quality, use the Special method of two-sided copying.
REGAL 5790 MATERIALS USAGE GUIDE
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