Xerox C8 - DocuPrint Color Inkjet Printer User manual

DocuColor8000/7000
Decurler
Adjustment
Version 1.0
April 2007

Prepared by:
Xerox Corporation
Global Knowledge & Language Services
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Building 845
Webster, New York 14580
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DocuColor 8000/7000 System Administration Guide i
Table of Contents
Table of Contents
Decurler Adjustment 1
Decurler Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Decurler Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Decurler Paper Type A - D Settings . . . . . . . . . . . . . . . . . . . . . . .3
Decurler Paper Type A - D procedure . . . . . . . . . . . . . . . . . .4
Decurler E Table Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Entering values in the Decurler E Table fields . . . . . . . . . . . 11
Creating a Decurler E Table Setting . . . . . . . . . . . . . . . . . . .14
Additional Decurler E Table Settings examples . . . . . . . . . . . . .22
Decurler E Table Settings example 1 . . . . . . . . . . . . . . . . . .22
Decurler E Table Settings example 2 . . . . . . . . . . . . . . . . . .30
Decurler E Table Settings example 3 . . . . . . . . . . . . . . . . . .38

DocuColor 8000/7000 System Administration Guide
ii
Table of Contents

DocuColor 8000/7000 System Administration Guide 1-1
1. Decurler Adjustment
Decurler Overview
KEY POINT: Please read all the Decurlerinformation before using
the Decurler E Table Settings (E1 - E6) 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 than low toner coverage jobs. 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.
• Paper Type A, B, C, and D settings: Preset Decurler settings,
which are manually selected as an alternative to the System
Default setting. See “Decurler Paper Type A - D Settings” on
page 3.
KEY POINT: 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 percentage of toner area coverage and the printer’s
humidity values, only.

DocuColor 8000/7000 System Administration 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 Paper Type A-D
settings. In those cases, use the Decurler E Table Settings
feature to compensate for paper curl in your prints. The Decurler E
Table settings are based on job type and percentage of toner area
coverage. These settings are manually entered. See “Decurler E
Table Settings” on page 9.
KEY POINT: If a Decurler profile setting is changed, it remains at
that setting until changed again manually. As an example, if you
decide to use the Paper Type B Decurler setting, the setting will
remain at Paper Type B until you change it to another setting.
KEY POINT: 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 the 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 Decurler Setup screen (Paper Type A-D settings), or
based on entries made on the Decurler E Table Settings screen.
The degree of pressure is applied independently to the upward
and downward Decurler arms.

DocuColor 8000/7000 System Administration Guide 1-3
1. Decurler Adjustment
Decurler Paper Type A - D Settings
If paper curl is a problem, using one of the preset Decurler Paper
Type 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 may
not result in satisfactory performance.
KEY POINT: 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 percentage of toner area coverage 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 digital press:
• To determine if Xerox has tested your paper type and weight
• View the recommended Decurler Paper Type A - D 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 8000/7000:
NOTE: The settings recommended in the “Recommended
Materials List for DocuColor 8000/7000” were developed from
testing a wide range of paper samples, percentage of toner area
coverage, 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 Paper Type A - D settings, See “Decurler
Paper Type A - D procedure” on page 5. For example:
• If the System Default is not correcting curl, select Decurler
Paper Type A.
• If Decurler Paper Type A is not correcting curl, select Decurler
Paper Type B.
• If Decurler Paper Type B is not correcting curl, select Decurler
Paper Type 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 8000/7000 System Administration Guide
1-4
1. Decurler Adjustment
• If Decurler Paper Type C is not correcting curl, select Decurler
Paper Type D.
• If System Default and Decurler Paper Type A, B, C, and D do
not correct curl, you can use the Decurler E Table Settings,
See “Decurler E Table Settings” on page 9.

DocuColor 8000/7000 System Administration Guide 1-5
1. Decurler Adjustment
Decurler Paper Type A - D procedure
If after using the System Default setting paper curl is still
unacceptable, select an alternate Decurler Paper Type A - D
setting:
1. At the controller, logon to the Tools menu as Administrator.
a. Press the Access button.
b. Enter the Administrator password.
NOTE: The default Administrator password is 11111. This
password may be changed to fit your needs.
c. Press Enter.

DocuColor 8000/7000 System Administration Guide
1-6
1. Decurler Adjustment
2. The Pathway Option screen opens. Select the Tools Pathway
button.
3. From the Tools Mode window, press:
a. Machine Defaults 2 tab.
b. Decurler Setup button.