Xerox DocuColor 5000 Manuale di servizio

DocuColor5000

Decurler

Adjustment

Version 1.0

April 2007

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This product includes software developed by the Apache Software Foundation (http://www.apache.org/http://www.apache.org/).

DocuColor 5000 System Administration Guide i

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

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.

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