Xerox 6180N DocuSP Common Controller System Guide - Page 135

Image Quality IQ

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System Guide Hints and Tips Image Quality (IQ) Generally the image quality of a base printing system is above average and the Image Quality (IQ) enhancements filters provided within DocuSP is unnecessary. If you wish to improve output IQ, the DocuSP provides separate controls for enabling Anti Aliasing, Trapping, and Intelligent Black Overprint. Disabling all three of these IQ filters improves performance. If you are printing only a small number of copies, the expected increase in RIP time is visible as a significant fraction of the total job processing time. When printing documents with a large a number of copies, then the majority of the processing time is devoted to the actual printing and the RIP performance decrease is less visible (a smaller fraction of the total job time). You should examine the DocuSP printed output with the IQ enhancing filters enabled and disabled and decide whether the IQ improvement is worth the performance drop for this particular job. On DC 2045/2060/6060/5252 and 8000 there are certain scenarios in which the printer will cycle down and do an Image Quality (IQ) adjustment. The percent area coverage of the page (that is, amount of image/text written on the page) also effects the number of IQ adjustments that the printer makes. A standard letter size page (8.5x11 inches) is about 21.6x27.9 cm or about 603.5 square cm. If the text and images written to a page cover more than about 250 square cm (about 40% of the page), then the print engine automatically generates IQ adjustments. If you find that a particular document seems to take a long time to print because of IQ adjustments, improve performance by simplifying the page. For example, the text and images on the page might be downsized to cover less than 40% of the viewable area of the paper and the performance may improve because the printer does fewer IQ adjustments. The DC 2045/2060/6060 print engine also performs IQ adjustments if a difficult job is being processed and RIP falls behind the print output. If this occurs, the print engine will cycle down for a few seconds while the RIP catches up and then it performs an IQ adjustment which takes anywhere from 5-95 seconds. During the IQ adjustment, the printer does not print anything. However, the RIP continues and be slightly ahead. As soon as the printer finishes the IQ adjustment it prints all of the RIPped pages and catch up with the printer. 9-7

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Hints and Tips
System Guide
9-7
Image Quality (IQ)
Generally the image quality of a base printing system is
above average and the Image Quality (IQ) enhancements
filters provided within DocuSP is unnecessary. If you wish to
improve output IQ, the DocuSP provides separate controls
for enabling Anti Aliasing, Trapping, and Intelligent Black
Overprint.
Disabling all three of these IQ filters improves performance. If
you are printing only a small number of copies, the expected
increase in RIP time is visible as a significant fraction of the
total job processing time.
When printing documents with a large a number of copies,
then the majority of the processing time is devoted to the
actual printing and the RIP performance decrease is less
visible (a smaller fraction of the total job time). You should
examine the DocuSP printed output with the IQ enhancing
filters enabled and disabled and decide whether the IQ
improvement is worth the performance drop for this particular
job.
On DC 2045/2060/6060/5252 and 8000 there are certain
scenarios in which the printer will cycle down and do an
Image Quality (IQ) adjustment. The percent area coverage of
the page (that is, amount of image/text written on the page)
also effects the number of IQ adjustments that the printer
makes. A standard letter size page (8.5x11 inches) is about
21.6x27.9 cm or about 603.5 square cm.
If the text and images written to a page cover more than
about 250 square cm (about 40% of the page), then the print
engine
automatically generates IQ adjustments.
If you find that a particular document seems to take a long
time to print because of IQ adjustments, improve
performance by simplifying the page. For example, the text
and images on the page might be downsized to cover less
than 40% of the viewable area of the paper and the
performance may improve because the printer does fewer IQ
adjustments.
The DC 2045/2060/6060 print engine also performs IQ
adjustments if a difficult job is being processed and RIP falls
behind the print output. If this occurs, the print engine will
cycle down for a few seconds while the RIP catches up and
then it performs an IQ adjustment which takes anywhere from
5-95 seconds. During the IQ adjustment, the printer does not
print anything. However, the RIP continues and be slightly
ahead. As soon as the printer finishes the IQ adjustment it
prints all of the RIPped pages and catch up with the printer.