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Contents
1 Calibrating the Printer ...........................................................................................................................1-1
Starting the Device Calibration Software ..............................................................................................1-2
Starting the Calibration Application and Exposing a Test Target .........................................................1-3
This section includes instructions for calibrating the Kodak Professional LED
Printers 20P/20R, Generations l and ll.
Kodak provides calibration applications for Windows NT and Macintosh systems.
See “Installing the Calibration Software” on page 3-1 for installation instructions.
See Section 3, Using Additional Calibration Features, for details about the
windows and dialog boxes for the application software and for additional
procedures not performed with each calibration.
Calibration is the process for creating and maintaining a Look-Up Table (LUT) that
produces the correct color balance for all images printed on the Printer. There is
sufficient variation among printers that each printer must be calibrated separately.
Before calibrating, make sure that:
•the paper path is threaded
•the printer status is “Online and Ready”
•no other printer applications are active
•the calibration application is running
•within the Kodak Professional Device Calibration software:
— at least one device is defined (see “Adding, Updating, and Deleting
Devices” on page 3-9)
— any needed changes to the configuration file are in place (see “Editing the
Device Configuration” on page 3-25)
•the densitometer is connected and calibrated
•the paper processor is in control
March 20011-1
Calibrating the Printer
You need to calibrate the printer when you start the system up each day. You also
need to calibrate the printer when
•you change paper
•print quality is questionable
•the temperature at the site changes more than 5° F (2.8° C)
•if running more than one shift, at the beginning of each shift
NOTE: Most windows displayed in this section are from the Windows NT version
of the software. The windows for the Macintosh version of the software are
similar.
For information about editing the calibration settings (for example, you may want
to display a calibration graph only if calibration is out of tolerance), see “Editing
the Device Configuration” on page 3-25.
Starting the Device Calibration Software
1. Open the KODAK PROFESSIONAL Device Calibration application.
The display shows the KODAK PROFESSIONAL Device Calibration window.
If the device you need to calibrate does not appear on the window, you need
to add a calibration device. See “Adding, Updating, and Deleting Devices” on
page 3-9.
LED Printer
icon
2. Select the icon for the LED Printer.
3. Click the Calibrate icon.
1-2March 2001
Calibrating the Printer
The display shows the LED Calibration Application window.
Starting the Calibration Application and Exposing a
Test Target
IMPORTANT: The settings in the configuration file for the selected device
determine some of the actions and messages in this procedure.
The configuration file is specific to your lab and its operations. For
more information about the configuration file, see “Editing the
Device Configuration” on page 3-25.
1. Click Go to start the calibration cycle.
Downloading LUTs and Sending Test Print highlights.
March 20011-3
Calibrating the Printer
NOTE: Once the application has started, the red stoplight is active and you
can click the icon to stop the calibration procedure.
If you click the red stoplight icon, the display shows the following dialog
box.
Otherwise, if the configuration file specifies to Ask if processor is in control,
the display shows the Process In Control dialog box.
The processor is critical to printer calibration. You can calibrate the printer
only if the processor is in control.
1-4March 2001
Calibrating the Printer
2. Click Yes.
The display shows the Choose Start LUT dialog box.
NOTE: The highlighted LUT in the dialog box above is the most recent
calibration LUT.
3. Click either Load Selected LUT or Load Custom LUT (or Cancel to cancel
the calibration process).
If you click Load Selected LUT, the system automatically down lo ads the
highlighted LUT to the printer to create a test print. When the test print has
been sent, the Scanning Processed Print with Densitometer status icon on
the LED Printer Calibration window highlights.
Continue with “Obtaining Densities” on page 1-6.
4. If you selected Load Custom LUT in step 3:
From the Open dialog box, select or type the name of the LUT file you want
and click Open.
The system automatically downloads the LUT file to the printer.
When the test print has been sent to the printer, the Scanning Processed
Print with Densitometer status icon on the KODAK LED Printer Calibration
window highlights.
March 20011-5
Calibrating the Printer
Obtaining Densities
There are three methods for obtaining densities:
•from a file
•from a densitometer
•from a centralized densitometer (NT only and if the Centralized Densitometer
application is installed on your network)
The contents of the calibration configuration file determine which method you use
(see “Editing the Device Configuration” on page 3-25).
Obtaining Densities from a File
If the configuration settings include obtaining the density data from a file, the
display shows the Waiting for Density File dialog box.
If the configuration settings do not include obtaining the density data from a file,
go to either:
•“Using the Densitometer to Read Densitie s” on page 1-7
•“Obtaining Densities from the Centralized Densitometer (NT Only)” on
page 1-8
NOTE: T o create a density file, see “Creating a Density File for Use with Calibration”
on page 3-36.
1. Click OK to continue with the calibration process.
2. Go to “Completing the Calibration” on page 1-10.
1-6March 2001
Calibrating the Printer
Using the Densitometer to Read Densities
NOTE: For LED Gen I devices, you read only one neutral strip.
Do the following to scan the neutral (gray) patches on the processed test print into
the densitometer (refer to your densitometer manual for detailed instructions on
using the densitometer):
1. Slide the lever on the densitometer to position 15. Align the edge of the test
print with the lever on the densitometer. Gently feed the test print through the
densitometer to scan the patches labeled “even”.
2. Slide the lever on the densitometer to position 20. Align the edge of the test
print with the lever on the densitometer. Gently feed the test print through the
densitometer to scan the patches labeled “odd”.
3. Slide the lever on the densitometer to position 30. Align the edge of the test
print with the lever on the densitometer. Gently feed the test print through the
densitometer to scan the patches labeled “both”.
Lever
Test print
If the test print is read successfully, several messages will appear in the status
bar; the final message indicates that the densitometer values have been
successfully received. Go to “Completing the Calibration” on page 1-10.
If the test print is not read successfully, refer to Section 2, Troubleshooting.
March 20011-7
Calibrating the Printer
Obtaining Densities from the Centralized
Densitometer (NT Only)
NOTE: For more information about installing and using the Centralized
Densitometer Application, see Section 4, Installing and Using the
Centralized Densitometer Application.
If the configuration settings include obtaining the density data from the centralized
densitometer application, the status bar shows a message.
1. Open the Centralized Densitometer Application.
1-8March 2001
Calibrating the Printer
The display shows the window for the Centralized Densitometer Application.
2. Highlight the device.
3. Click Measure (or select Operations->Measure) to measure the target
images.
4. At the densitometer, measure the densities (see “Using the Densit ome ter to
Read Densities” on page 1-7).
When the densities are measured, the status bar on the Centralized
Densitometer Application window shows “Ready.”
The density measurements are automatically sent to the LED printer’s host
computer.
Continue with “Completing the Calibr at ion .”
March 20011-9
Calibrating the Printer
Completing the Calibration
1. If calibration is in tolerance, the display shows the LUT Attributes dialog
box.
a. Type a name or comment in the dialog box. The comment you enter will
appear on the Send LUT to Printer dialog box to identify the LUT file with a
name that is meaningful to you (up to 75 characters).
b. Click OK.
The new printing LUT is calculated and downloaded. The status bar shows
“Calibration Complete.”
2. If calibration is out of tolerance, it may be necessary to run four or more
iterations of the calibration cycle to achieve a successful calibration.
1-10March 2001
Calibrating the Printer
If the print densities are out of tolerance, the display shows a graph that
allows you to select the type of data and planes that you want to see
displayed.
a. Click OK.
March 20011-11
Calibrating the Printer
If specified in the configuration file, the display shows a list of options.
Re-read the densitometer values is most useful when the graphs show
an unusual plot. Rereading the test print lets you validate the graph, then
returns you to the Out of Tolerance dialog box.
Iterate again using a newly calculated calibration LUT allows you to
keep printing test prints with the newly created LUT without having to save
the LUT table.
Calculate and download a printing LUT and s top: When you select this
option, the LUT is calculated and the file is saved with the creation date
and time as its name.
Cancel and return the printer to its original state saves nothing. Any
corrupted data created after you saved the last time is thrown away.
b. Select one of the four options to try to complete the calibration
successfully.
1-12March 2001
This section describes the problems that you may occasionally have when using:
•the KODAK Device Calibration Software and the Calibration Software for the
KODAK PROFESSIONAL LED II Printer
•the X-RITE DTP36 Densitometer
Calibration Graph
The graph below is an indication that the calibration performed was out of
tolerance.
2 Troubleshooting
This may be result from invalid densitometer readings. It is necessary to perform
another calibration cycle if you see a graph that looks like the one above.