Xerox DocuColor 2045 - Manual (Page 71)

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Paper Registration Adjustment
Use the Paper Registration Adjustment feature when running duplex jobs to
adjust the image position if the registration is not correct.
Image adjustment may be necessary for a couple of reasons:
• Paper is not always the exact same size. It may vary slightly, with
differences of plus or minus 1mm, causing the image to be misregistered. To
reduce the possibility of size differences, it is recommend that you use paper
from the same lot when running duplex jobs.
• During the fusing process, the heat and pressure applied to the paper causes
the paper to stretch. If the images on sides one and two are the same size,
the stretching of the paper will cause the image on side one to be slightly
larger than the image on side two.
Some RIP manufacturers have a paper registration feature that you can also use
to adjust the position of the image on the paper. Refer to the documentation that
came with your RIP.
Use the following procedure to adjust for side one/side two registration
problems:
1
Prepare the image, or images, by noting a reference point on side one, or by
placing registration marks at the image border. You can use a reference point
within the image or at the corner of the image.
KEY POINT: Remember that the digital press does not print bleed edge
images.
2
Output 10 duplex prints and compare the registration mark or reference point on
side one to side two. Discard the first few prints, as inconsistency tends to be
greater with these images. If there is misregistration, continue with this
procedure.
3
Measure the distance between the registration point and the edge of the paper
on both the lead edge (Y) of the paper and the side edge (X).
Refer to the Measuring Misregistration figure below. The solid line registration
marks indicate the reference point on side one. The dotted lines indicate the
reference point on side two.