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ADJUSTING PRINT QUALITY AND PERFORMANCE
XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE
6-9
300 dpi versus 600 dpi performance
There is one additional issue to consider when running performance
tests with the Model 92C. The above examples were run at 300 spots
per inch resolution. When a block of jobs starts, the DocuPrint will
report the printing resolution, the page size of the document, and the
number of page buffers available in the software for the job. At 300
dpi, on 216 x 279 mm paper (UsLetter), 139 page buffers are
reported allocated. This is consistent with a DocuPrint Printer
Controller with 192 MB of memory installed.
When running jobs at 600 dpi, the amount of available page buffers
available is 4 times smaller. This leads to a corresponding decrease
in the overall performance of a job. Here is the sequencer log entry
when the above job is run at 600 dpi:
As shown above, only 35 page buffers are allocated at 600 dpi. The
decomposition rate of this job at 600 dpi is:
PPM = 60 x 217/147.92 = 88.0 pages per minute,
which represents the maximum rate that this job can be printed at
600 dpi.
Setting page order
DocuPrint delivers documents with the pages face down in the order
presented in the Page Description Language. The order can be
changed by setting the PageOrder attribute.
If the Staple attribute is set, DocuPrint must deliver the document
face up. In order to deliver the stapled document in the correct order,
it must image the document in reverse page order. In order to image
a document in reverse page order, the entire document must be
processed before printing starts.
For the best print speed, ensure that each PostScript program has
the pages in the correct order for the finishing requirement for the
document:
•
No finishing is required: PDL should be in ascending page
order. PageOrder attribute should be set to ascend.
•
Stapling is required: PDL should be in descending page order.
•
Duplex printing is required: there should be an even number of
pages. Page order should be set to descend.
[Job #214 start, ftpadmin, 99995163.ps, November 19, 1996 1:10:37 pm PST]
[Printing duplex, 600 spi, 216 x 279 mm, 35 buf]
[Job #214 stop, ftpadmin, 99995163.ps, November 19, 1996 1:13:38 pm PST
[ pages: 217, decomp: 147.92, elapsed: 181.47, compress: 15.08x, min
free: 101670K]
[ compress pages: 5, expand pages: 0]
Summary of Contents for DocuPrint 92C NPS
Page 10: ...INTRODUCTION x XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 18: ...TROUBLESHOOTING A NOVELL IMPLEMENTATION 3 4 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 44: ...CLEARING PAPER MISFEEDS AND JAMS 4 26 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 48: ...USING SAMPLE DOCUMENTS 5 4 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 62: ...CORRECTING STACKING PROBLEMS 7 2 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 64: ...SYSTEM UNRESPONSIVE 8 2 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...
Page 68: ...INDEX INDEX 4 XEROX DOCUPRINT 92C NPS TROUBLESHOOTING GUIDE...