Xerox DocuColor 5000 Service manual

DocuColor5000
Decurler
Adjustment
Version 1.0
April 2007

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DocuColor 5000 System Administration Guide i
Table of contents
Table of contents
Decurler Adjustment 1-1
Decurler Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Decurler paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Decurler A-D Profile settings . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Decurler A-D Profile procedure. . . . . . . . . . . . . . . . . . . . . . 1-5
Custom Decurler Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Entering values in the Custom Decurler Profile fields. . . . 1-11
Creating a Custom Decurler Profile . . . . . . . . . . . . . . . . . 1-14
Additional Custom Decurler Profile examples . . . . . . . . . . . . 1-23
Custom Decurler Profile example 1 . . . . . . . . . . . . . . . . . 1-23
Custom Decurler Profile example 2 . . . . . . . . . . . . . . . . . 1-30
Custom Decurler Profile example 3 . . . . . . . . . . . . . . . . . 1-36

DocuColor 5000 System Administration Guide
ii
Table of contents

DocuColor 5000 Administrator Guide 1-1
1. Decurler Adjustment
Decurler Overview
TIP: Please read all the Decurler information before using the
Custom Decurler Profile procedure.
When paper is exposed to heat, the paper loses moisture and
curls toward the heat source. High toner coverage jobs tend to
curl more due to the toner plastification effect on the paper
surface. The system tries to reduce this by using mechanical
devices within the paper path called Decurlers.
Paper curl is caused by many variables, including, but not in any
particular order:
• The weight of the paper and whether it is coated or uncoated.
• The amount of dry ink/toner and the area being covered on a
sheet: the heavier the coverage, the greater the tendency to
curl.
• How the paper is loaded in the tray. Make sure you load the
paper as instructed on the ream wrapper.
• The atmospheric conditions of the room where the paper is
stored and where the printer is located, especially those
related to humidity and temperature.
• The heat generated during the fusing processes.
Your system is designed with several automated settings to
control curl. When using these settings the machine automatically
sends paper through the proper Decurler:
• System Default: Automatically determines the amount of
pressure needed at the different decurlers in order to reduce
the output curl of the paper.
• A, B, C, and D settings: Preset Decurler settings, which are
manually selected as an alternative to the System Default
setting. See “Decurler A-D Profile settings” on page 3.
IMPORTANT! While paper curl is caused by many variables, it is
important to understand that the preset and custom Decurler
profile settings use lookup tables for curl control that are based on
the job’s image density ratio and the printer’s humidity values,
only.

DocuColor 5000 Administrator Guide
1-2
1. Decurler Adjustment
With some print jobs, the output prints still may be curled more
than you desire even after using the Decurler A-D Settings. In
those cases, use the Custom Decurler Profile feature to
compensate for paper curl in your prints. Custom Decurler Profile
settings are based on job type and image density ratio. These
settings are manually entered.
IMPORTANT! If a Decurler profile is changed, it remains at that
settinguntil changed again manually. As an example, if youdecide
to use the B Decurler setting, the setting will remain at B until you
change it to another setting.
NOTE: It is important to remember that a successful Decurler
setting used today may not be the same setting that you would
use on another day for that same file. This is especially relevant if
the room in which printer is located experiences changes in
temperature and humidity.
Decurler paper path
The Decurler has both upper and lower adjustment arms that
apply pressure to the paper based on system defaults, selections
made on the Tray Properties screen (A-D settings), or based on
entries made on the Decurler Profile screen. The degree of
pressure is applied independently to the upward and downward
Decurler arms.

DocuColor 5000 Administrator Guide 1-3
1. Decurler Adjustment
Decurler A-D Profile settings
If paper curl is a problem, using one of the preset Decurler A-D
Profile settings usually eliminates the problem. However, due to
the broad range of paper variables, image coverage, and
environmental factors, these default settings still may not result in
satisfactory performance.
NOTE: While paper curl is caused by many variables, it is
important to understand that the preset and custom Decurler
profile settings use lookup tables for curl control that are based on
the job’s image density ratio and the printer’s humidity values,
only.
Visit the www.xerox.com web site and refer to the latest
Recommended Materials List (RML) for your DC 5000 digital
press:
• To determine if Xerox has tested your paper type and weight
• View the recommended Decurler A - D Profile settings for
particular paper types.
The following table shows examples of the Decurler A - D Profile
settings for particular stocks, which were taken directly from the
Recommended Materials List for the DocuColor 5000:
NOTE: The settings recommended in the “Recommended
Materials List for DocuColor 5000” were developed from testing a
wide range of paper samples, toner area coverages, and
environments. The outcome of this testing is the preset
parameters shown in the list, and these parameters refer to how
particular papers interact with the digital press decurling system.
If the System Default setting is not correcting curl, then you can
use one of the Decurler A - D Profile settings, See “Decurler A-D
Profile procedure” on page 5. For example:
• If the System Default is not correcting curl, select Decurler
Profile A.
• If Decurler Profile A is not correcting curl, select Decurler
Profile B.
• If Decurler Profile B is not correcting curl, select Decurler
Profile C.
Decurler A - D Profile settings examples
Paper Type Decurler
Setting
Xerox Digital Color Supreme Gloss 8pt. Cover C1S A
Xerox Color Xpressions +, 32 LB B
Xerox Digital Color Parchment White, 24 LB. A
Xerox Digital Color Elite Gloss 100# Text A

DocuColor 5000 Administrator Guide
1-4
1. Decurler Adjustment
• If Decurler Profile C is not correcting curl, select Decurler
Profile D.
• If System Default and Decurler Profiles A, B, C, and D do not
correct curl, you can use the Custom Decurler Profiles. See
“Custom Decurler Profiles” on page 8.

DocuColor 5000 Administrator Guide 1-5
1. Decurler Adjustment
Decurler A-D Profile procedure
If after using the System Default setting paper curl is still
unacceptable, select an alternate Decurler Type A - D Profile
setting:
1. At the controller, logon as Administrator.
a. Select Logon.
b. Enter the Administrator password.
NOTE: The default Administrator password is 11111. This
password may be changed to fit your needs.
c. Select [OK].

DocuColor 5000 Administrator Guide
1-6
1. Decurler Adjustment
2. Select the appropriate tray.