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6-94 XEROX DOCUPRINT 180 LPS PDL REFERENCE
As you can see, there are no absolutes and no set methods for
accomplishing your printing goals. The variables involved
include individual finishing device requirements, the paper sizes
required by your applications, the complexity of each page, the
number of pages in each application, and so forth. But a
general understanding of the relationship between paper size
and pitch mode, and the advantages of specifying pitch modes
will help you optimize your printing activities.
The DocuPrint 180 LPS operates in multiple pitch modes: 3, 4,
5, 6, 7, and 8. Table 6-10 shows the pitch mode minimum and
maximum boundary values, in inches, along with their
associated print speeds, shown in pages per minute, which can
be specified with the TMODE parameter of the OUTPUT
command.
In 7-pitch mode, the system can process paper from 8 inches
by 10 inches to 9.01 inches by 14.33 inches (203 x 254 to 229 x
364 mm) in a long-edge feed mode. Long-edge feed mode
means the sheet is fed into the paper path with its long edge
first. In 7-pitch mode, the DocuPrint 180 prints with full
productivity at 180 pages per minute, with seven page images
per photoreceptor revolution. For papers whose width ranges
from 8.5 inches to 9.01 inches, the DocuPrint 180 prints with
slightly reduced productivity. The reason for this is that for
papers in this width range, the normal image area extends into
the inter-image zone that is normally used for xerographic
process controls. In order to maintain the best productivity
possible, xerographic process controls are temporarily
suspended. Periodically, the DocuPrint 180 will induce about 14
skipped “images” in order to perform a xerographic process
control check and ensure that the DocuPrint 180 maintains the
highest print quality. It will then resume printing at full
productivity.
For any paper size wider than 15.32 inches, 389 mm, in width,
the system automatically switches to 3-pitch mode, which prints
up to 77 pages per minute. For very large paper, 11 inches by
17, inches for example, paper is short edge fed, so that the 11
inch side leads through the printer.
Table 6-73. Pitch mode minimum and maximum boundary
values and pages-per-minute throughput
PITCH IN CM MM DOTS XDOTS
Pages per
minute
(ppm)
3 15.31< x < 17.00 38.9 to 43.18 389 to 431.8 4595 to 5100 9190 to 10200 77
4 12.12< x < 15.31 30.8 to 38.9 308 to 389 3639 to 4594 7277 to 9189 103
5 10.19< x < 12.12 25.9 to 30.8 259 to 308 3060 to 3638 6119 to 7276 128
6 9.01< x < 10.19 22.9 to 25.9 229 to 259 2705 to 3059 5410 to 6118 154
7 7.40< x < 9.01 18.8 to 22.9 188 to 229 2221 to 2704 4442 to 5409 180
8 7.00< < x < 7.40 17.8 to18.8 178 to 188 2100 to 2220 4205 to 4441 206