Xerox 96 NPS manual Minimizing the start-up latency

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ADJUSTING PRINT QUALITY AND SPEED

Since the DocuPrint usually decomposes more than one job at a time, the jobs are time-shared on the one processor and this will cause the decomposition time to be larger than if the DocuPrint decomposed once by itself. In the sample log, there are always 3 jobs printing at the same time and the decomposition times reported vary from 83.69 to 85.02. After submitting this job by itself, the decomposition time reported is:

Job #213 start, ftpadmin, 99995163.ps, November 19, 1996 1:05:04 pm PST Printing duplex, 300 spi, 216 x 279 mm, 139 buf

Job #213 stop, ftpadmin, 99995163.ps, November 19, 1996 1:07:17 pm PST pages: 217, decomp: 83.51, elapsed: 134.70

PPM=60x217/83.51 = 155.9 pages per minute

This is considerably higher than the maximum speed of the printer, so it is very likely that this job prints at rated speed.

Minimizing the start-up latency

There are two ways to get a measurement that minimizes the impact of the start-up latency of the printer.

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Use a stopwatch to measure the elapsed time from when the first sheet is delivered to when the last sheet is delivered to the output tray.

Take the start time and stop time from the sequencer for a larger block of jobs.

Using the second method, the same job as in the first example was submitted 10 times to measure the throughput for 2170 pages. Here is part of the log:

XEROX DOCUPRINT 96/4635/180 NPS TROUBLESHOOTING GUIDE

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Contents Version 7.1 August 2000 721P86651 Page Laser safety Operation safetyOzone information Xerox Docuprint 96/4635/180 NPS Troubleshooting Guide Table of contents Correcting stacking problems System unresponsive Index Contents IntroductionAbout this guide Conventions DocuPrint NPS Interactive Customer Documentation CD Related publicationsPage Information to have on hand when calling for service Calling for serviceEnabling and disabling the modem for remote service Fault masking Fault List screen Troubleshooting Xerox Client Software installation Troubleshooting Xerox Client Software Installation Troubleshooting a Novell implementation Pserver problems Problem Probable Cause ResolutionPASSWORDS=ON at Problem Probable Cause Resolution Rprinter problems Problem Probable Cause Resolution Page Clearing paper misfeeds and jams Clearing a feeder tray faultClearing Paper Misfeeds and Jams Frequent misfeeds Clearing paper jams Checking job integrity following a paper jam Fault InstructionsArea Printer areasArea Area Area Area Area Area Area Area Area Clearing bypass transport paper jams Area Measuring the paper curl Paper curl and paper jamsDecurler lever Adjusting the decurler leverPaper curl chart Arguments None Using sample documentsListing and printing sample documents List Sample DocumentsPrint Sample Document PS-oplist sample documentsArguments Document Using Sample Documents Page Installing the custom transfer assist blade Adjusting print quality and speedCorrecting skewed printing Adjusting the registration transport roll leversAdjusting Print Quality and Speed Measuring performance Calculating throughput Enter Start Printing Minimizing the start-up latency 99995163.ps, November 19, 1996 35222 pm PST Dpi versus 600 dpi performance Setting page order Product features that affect print qualityProprietary PostScript extensions Device-dependent operators Gray shading-setscreen and setcolorscreenGray shading-settransfer and transfer function Scan conversion-fill, eofill, and stroke Settransfer, or SetcolortransferSmooth curves-setflat Invisible strokes-0 setlinewidthSymptom Probable cause Action Correcting stacking problemsPage System unresponsive Configuring and Managing the System forPage Numerics IndexIndex