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Specifying print format parameters
4-86 Using LCDS Print Description Language
• Pitch modes and throughput performance: The printing
system can operate in several different pitch modes: 3, 4, 5,
6, and 7. The following table shows the minimum and
maximum boundary values for each pitch mode and the
default paper sizes that can be specified with the TMODE
parameter. The table shows these default scan values in
inches (IN), centimeters (CM), DOTS, and XDOTS (dots at
600 dpi), along with their associated print speeds in pages
per minute (ppm).
– In 7 pitch mode (the normal pitch mode for printing), the
printer can process paper from 8 inches by 10 inches to
9.01 inches by 14.33 inches or 203 by 254 to 229 by 364
mm, in long-edge feed mode. This means the sheet is fed
into the paper path with its long edge first.
In this pitch mode, the printer prints with full productivity at
180 pages per minute, with seven page images per
photoreceptor revolution.
– For papers whose width ranges from 9.01 inches to 15.31
inches, the printer prints with slightly reduced productivity.
The reason for this is that for papers in this width range,
the normal image area extends into the interimage 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 system induces about 14 skipped
“images” in order to perform a xerographic process
control check and to ensure that the highest print quality is
maintained. The printer then resumes printing at full
productivity.
Table 4-78. Pitch mode minimum and maximum boundary values
and pages per minute printing speeds
PITCH IN CM MM DOTS XDOTS 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 to 18.8 178 to 188 2100 to 2220 4205 to 4441 206
*Pages per minute