Xerox FreeFlow manual Pitch modes and throughput performance The printing, Pitch Dots Xdots PPM

Specifying print format parameters

•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).

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

–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.

4-86 Using LCDS Print Description Language