Xerox 4650, 4450 manual Determining line density limitations, Landscape pages, Portrait pages

Page 57

TROUBLESHOOTING

 

The hardware limitation of 320 dispatchable items per 300 spi

 

scan line (640 for 600 spi) includes the required overhead of two

 

dispatchable items. For example, a dispatchable item could be a

 

maximum of 32 dots wide for 300 spi (64 dots for 600 spi), and

 

thereby might be a full character (less than point size 8 or 9), a

 

fraction of a character (greater than point size 8 or 9), or a line

 

segment that is equal to or smaller than 32 dots in the scan

 

direction.

Determining line density limitations

The following is a guide for determining 300 spi line density

 

limitations. If printing at 600 spi, the same size character or same

 

length line has twice as many dots, as follows:

 

· Every 32 dots (or fraction thereof) of a line drawn on the

 

long axis of the paper are one dispatchable item.

 

· Each line drawn on the short axis of the paper is one

 

dispatchable item.

 

· Each active character is at least one dispatchable item. (An

 

active character includes all the space from the top of the

 

character cell to the bottom of the character cell, even if

 

there is only white space present on a given scan line.) If the

 

dimension along the scan line is greater than 32 dots, the

 

character consists of some multiple dispatchable items.

 

It is not possible to construct a form with two adjacent lines if

 

both use the full count of 318 dispatchable items (320 minus the

 

two required for overhead) resulting from text and lines. The

 

imaging system requires a rest period of about four scan lines

 

before it can image the second fully loaded line.

Landscape pages

Line density restrictions differ as a function of the mode

 

(landscape or portrait) of the form. An 8-point or smaller

 

landscape font is smaller than 32 dots for 300 spi and 64 for 600

 

spi. A vertical line is a single dispatchable item. A horizontal line

 

is treated as a series of 32 dots in length, joined end-to-end.

 

For 300 spi, this means that a form using an 8-point or smaller

 

font on a landscape page may have up to 318 characters (plus a

 

two-item overhead, for a total of 320 dispatchable items) on a

 

scan line. For example, when using a 6-point font, it is possible

 

to have 132 characters, a line across the page under the text, and

 

up to 90 vertical lines, without exceeding the line density

 

limitations.

 

If a form requires a 9-point or larger font, the number of

 

characters that may be imaged on a landscape page is reduced to

 

160 because the characters are generally more than 32 dots

 

wide. While the dispatchable-item count remains 320 per line,

 

fonts 9 points and larger use two dispatchable items per

 

character. Since a character in a large font constitutes two

 

dispatchable items, only half as many characters in a large font

 

may be imaged on a scan line as is possible with a smaller font.

Portrait pages

Restrictions for a portrait page are significantly different from

 

those for a landscape page because the system always images in

 

the landscape direction. Therefore, if a page is formatted in

 

portrait orientation, the hardware must reorganize the data into

 

landscape prior to imaging.

XEROX 4050/4090/4450/4650 LPS FORMS CREATION GUIDE

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Contents Xerox Page Table of contents Compiling and printing forms TroubleshootingGrid Font Line BOX Text Logo Graphic Section Comment ENDGlossary AppendicesIndex GLOSSARY-1Page Uppercase Bold Blue IntroductionLowercase black italics UppercasePublication Number Related publicationsLPS Advantages of FDLFonts OrientationCharacter spacing/line length examples Image size considerations PaperFont memory SystemVirtual PhysicalPhysical page sizes Inches MillimetersVirtual page origin EdgemarkingImaging error messages Registration shift and skewNon-imaged elements Landscape orientation shift and skew 11 x Patient Name Output performance considerationsForm origin Form elements and corresponding origins Positioning form elementsForm element Text block originY coordinates GridsPredefined formats Data types Data typesData type Description FDL command overview Command formatForms Description Language Command summary FDL command summaryCommand types Commands Command function Setup commands Form creation processForm Paper LANDSCAPE/PORTRAIT Grid Font FORM/RESOLUTION Paper Size is value PaperParameter options Unit by y unitLANDSCAPE/PORTRAIT Orientation page Size is n Wide by m HighOrientation Grid Unit is format id Origin y unit x unit GridGrid Unit is value Origin y unit x unit Format idFont Fonts id 1 id 2 id 3...id 32jFonts UN106A,UN104C,UN114A · Line · BOX · Text AT · Text in BOX · Logo · Graphic Description commandsLine Direction AT c a unit c a unit ... Every c i unitDirection BOX Density ThicknessText AT Text#ETAIL #D#ISTRIBUTION Text in BOX Using Font n in position BOX y unit x unit `text `textNext direction BOX `text `text PositionNext Horizontal BOX `text `text Text positioningLogo id AT y unit x unit LogoEagle GraphicGraphic name AT vpos unit hpos unit Scale is n/d VposPlacing a graphic Sample .FSLSyntax Begin Section id Do Section id AT y unit x unitBegin Section Phone Default NoneBegin Section PhoneComment Do Section Phone AT 0,0 Do Section Phone AT 30,37Syntax Comment text Syntax END Parameters None Default None ENDEndend Form printing process Compiling and printing formsFSL data transfer OfflineOnline Compiling a formFDL compilation time Invoking the forms compilerRES=spi Compiling 600 spi formsCompiling 4850 color forms and logos Error checks Using the compilation optionsSummary sheet FDL Tryit SimplexProof File storageFDL filename Proof Secured filesExample 1 FDL Tryit Tray Printing a compiled formSample filename.FRM Sample TRYIT.FRMSuggested coding techniques TroubleshootingConverting preprinted forms Designing new formsRecommended coding sequence Syntax ambiguitiesForms Paper size Hints and tips Hints and tipsKeywords Hints and tips Image complexity factors Line tablesHints and tips Keywords Example of extraneous drawn lines Importance of orderly constructionLines entered in unintended locations Scan line densityDetermining line density limitations Landscape pagesPortrait pages Generation errors Local density and page setup errorsSuperimposed lines Solid 2 box sharing part of a Solid 1 box edge Using boxesError calculations Text in boxesLocating the closest box Centering text in boxes Correcting text-in-box errorsText Spaced AT 4 Dots in BOX 10 `TEXT Line Shading factorsSection factors Terminating shading to avoid line density problemsAT 8 Draw VER Line from 4 to 5 Using Hairline Rounding measurement factorsConverting other unit values to dots Rounding variable data Grid unit specification System response Grid unit scaling specificationsFDL statistics Grid unit scalingFDL command syntax summary FDL command syntax conventionsSyntax Meaning END Compiling commands syntaxSystem default summary Specification Substitution Grid and origin substitutions for 8.27 byInch/A4 paper Grid and origin substitutions for all paper sizes Page Figure C-1.Earnings register Sample form creationUsing the Comment command Writing the setup commandsDrawing lines Vertical Line commandDrawing horizontal lines Drawing vertical linesPlacing text at a location Drawing boxesPlacing text in a box Using the END commandEdit 1STFRM.FSL Compiling the formFigure C-12.Source statement 1STFRM.FSL Page FDL capacity limits Capacity limitsMaximum Page Format ID No. Lpi Cpi Point Size Standard print formatsBegin Lines Columns Size1 Orientation2 Values y,x Font IDPage Forms design ruler Support tools and measurementsStandard formats and spacings Side Formats/spacingSupport Tools and Measurements Grid examples Command examplesForm results with grid specified, but no Size or originGrid Unit is 1 CM Command ExamplesFigure G-5.Form results with grid and page size specified Draw Line examplesFigure G-8.Drawing a horizontal line inches Every BOX examplesFigure G-12. Drawing boxes Shading and Repeat Vertically EveryText AT examples Command Examples Text in BOX examples Center positionsBottom positions BCD GlossaryBOF BOTDjde CMEEnet EOTFCP FCBFCU FDLJCL JCBJDE JDLLPS PCC PDEPDL PSC Ucsb TOFUCS XddiSymbols IndexFDL Image FSLPredefined formats, 1-13, 2-6 to
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