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

800 Phillips Road

Building 845

Webster, New York 14580

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subsequent editions.

DocuColor 8000/7000 System Administration Guide i

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

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.

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