Appendix

A

Logical Page Setting

The purpose of this appendix is to help you create imposition files in the pre-calibration and color calibration chapters of the Color Management Guide. The Logical Page Setting is one of the necessary properties that needs to be configured when creating an imposition file.

Note

This section is referenced as appropriate throughout the pre-calibration and color calibration chapters of this manual.

The Logical Page Setting is comprised of two sets of numerical values:

Offset Specification

The Offset Specification determines the positioning of the printed page on the paper.

Accordingly, the PC-UI requires the following two numerical values:

1.

X-direction, which determines how far away the printed page is from the outboard paper edge (on the imposition preview screen).

2.

Y-direction.

Logical Page Size

The Logical Page Size (or image area) tells the software what the printable area of the paper is.

Accordingly, the PC-UI requires the following two numerical values:

1.

Width.

2.

Height.

Printer Operator Guide A-1

Appendix Xerox 490/980 Color Continuous Feed Printing System

Offset Specification and Logical Page Size Explained

The two sets of numerical values that make up the Offset Specification and the Logical Page

Size are dependent on two variables:

1.

The DPI (dots per inch) selected in the imposition file, which can be either:

• 300x300 DPI or;

• 600x600 DPI

2.

The width of the logical page (image area) being printed.

Note

In the following paragraph, it mentions that a logical page size of 5.6 in (142 mm) by 12 in

(305 mm) is used. This is because 5.6 in (142 mm) by 12 in (305 mm) is the size of the test pattern printed to perform color calibration using the Xerox 490/980 Color Continuous Feed

Printing System SIR.

Later in this chapter, there is a

Table of Offset Specification and Logical Page Size Values . This table

shows the numerical values for the Offset Specification and Logical Page Size for widths of paper stock from 8.3 (211 mm) in to 19.5 in (495 mm) and a logical page size of 5.6 in (142 mm) by 12 in (305 mm).

If the width of the paper stock you are using is not covered in the Table of Offset Specification and

Logical Page Size Values

, use the sample procedure in the section Calculate Offset Specification and

Logical Page Size Values to determine the appropriate numerical values.

A-2 Printer Operator Guide

Xerox 490/980 Color Continuous Feed Printing System Appendix

Calculate Offset Specification and Logical Page Size Values

The following sample procedure uses the following hypothetical paper stock width, logical page size (image area) and DPI settings:

• Paper Stock Width: 8.3 in (457 mm)

• Logical Page Size (image area): 5.6 in (142 mm) x 12 in (305 mm)

• DPI: 300x300

To Calculate Logical Page Size Width

Multiply the width of the logical page size in inches by the DPI:

5.6 x 300 + 500 = 1680 = Logical Page Size Width

To Calculate Logical Page Size Height

Multiply the height of the logical page size in inches by the DPI:

12 x 300 = 3600 = Logical Page Size Height

To Calculate Offset Specification X-direction

1.

Multiply the width of the paper stock in inches by the DPI:

8.3 x 300 = 2490

2.

Divide the number calculated in the previous step by 2:

2490 / 2 = 1245

3.

Divide the Logical Page Size Width already calculated by 2:

1680 / 2 = 840

4.

Subtract the number calculated in step 2 by the number calculated in step 3:

1245 - 840 = 405 = Offset Specification X-direction

To Calculate Offset Specification Y-direction

This value is always equal to 0.

When finished with all calculations...

Add 500 dpi to the Logical Page Width:

1680 + 500 = 2180 = New Logical Page Width

Subtract 200 dpi from the Offset Specification X-direction:

405 - 200 = New Offset Specification X - direction

The Logical Page Settings should match the graphic below:

Printer Operator Guide A-3

Appendix Xerox 490/980 Color Continuous Feed Printing System

Table of Offset Specification and Logical Page Size Values

The following table shows the numerical values for the Offset Specification and Logical Page

Size for:

• Widths of paper stock from 8.3 in (267 mm) to 19.5 in (495 mm) at 0.5 in or 12-13 mm intervals

• A logical page size of 5.6 in (142 mm) by 12 in (305 mm)

• A DPI setting of 300x300

Paper Stock Width

8.3 in (211 mm)

8.5 in (216 mm)

9 in (229 mm)

9.5 in (241 mm)

10 in (254 mm)

10.5 in (267 mm)

11 in (279 mm)

11.5 in (292 mm)

12 in (305 mm)

12.5 in (317 mm)

13 in (330 mm)

13.5 in (343 mm)

14 in (356 mm)

14.5 in (368 mm)

15 in (381 mm)

15.5 in (394 mm)

16 in (406 mm)

16.5 in (419 mm)

17 in (432 mm)

17.5 in (444 mm)

18 in (457 mm)

18.5 in (470 mm)

19 in (483 mm)

19.5 in (495 mm)

Offset Specification (DPI)

685

760

835

910

985

1060

1135

1210

385

460

535

610

X-direction

205

235

310

1285

1360

1435

1510

1585

1660

1735

1810

1885

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Y-direction

0

0

0

0

0

0

0

0

0

0

Logical Page Size (DPI)

2180

2180

2180

2180

2180

2180

2180

2180

Width

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

2180

3600

3600

3600

3600

3600

3600

3600

3600

Height

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

3600

A-4 Printer Operator Guide