Xerox 721P83071 User Manual
PRODUCT DIFFERENCES/USER CONSIDERATIONS
Note: On 4635MX systems, Print Darkness is restricted to only
level 5 when printing in the MICR mode.
level 5 when printing in the MICR mode.
Interpolation and scanned images
The 4635 LPS accepts 300 spi data and prints it using a 600 spi
dual beam raster output scanner (ROS). To convert 300 spi input
data to 600 spi print output, the system uses an interpolation
algorithm to smooth lines and improve the quality of 300 spi
fonts and line art.
dual beam raster output scanner (ROS). To convert 300 spi input
data to 600 spi print output, the system uses an interpolation
algorithm to smooth lines and improve the quality of 300 spi
fonts and line art.
Note that the interpolator does not always improve scanned half-
tone images. The Xerox 7650 Pro Imager Scanner has several
screens which attempt to maximize the effect of interpolation on
the quality of half-tones. However, in order to utilize these new
screens you must re-scan previously scanned images. The
relative level of improvement needs to be evaluated by you on
your own half-tone images.
tone images. The Xerox 7650 Pro Imager Scanner has several
screens which attempt to maximize the effect of interpolation on
the quality of half-tones. However, in order to utilize these new
screens you must re-scan previously scanned images. The
relative level of improvement needs to be evaluated by you on
your own half-tone images.
Switching paper size and feed modes
The 4635 LPS system operates in a multiple-pitch print mode: 7
pitch to 3 pitch.
pitch to 3 pitch.
The multi-pitch feature allows your 4635 LPS to adjust the pitch
mode according to the width of the paper you are using. Table
5-2 shows the relation between the pitch mode, the maximum
width of the paper being fed in a long edge feed mode, and the
page per minute (PPM) rate. Long edge feed mode means the
sheet is fed into the paper path with its long edge first.
mode according to the width of the paper you are using. Table
5-2 shows the relation between the pitch mode, the maximum
width of the paper being fed in a long edge feed mode, and the
page per minute (PPM) rate. Long edge feed mode means the
sheet is fed into the paper path with its long edge first.
Table 5-13.
Pitch modes
* 8 pitch is enabled only with the optional Paper Feeding
Enhancement Kit installed
Pitch mode
Maximum paper width
PPM rate
3-pitch
17 inches/431 mm
58 PPM
4-pitch
15.3 inches/389 mm
78 PPM
5-pitch
12.1 inches/308 mm
98 PPM
6-pitch
10.2 inches/259 mm
117 PPM
7-pitch
9 inches/229 mm
135 PPM
8-pitch*
7.4 inches/188 mm
154 PPM
For papers whose widths range from 8.66 to 9 inches, the 4635
prints with slightly reduced productivity at 135 pages per minute,
with seven-page images per photoreceptor revolution.
Productivity is slightly reduced because in order to maintain print
speed for papers of this size, the system must temporarily
suspend xerographic print quality checks. The 4635 maintains
the highest print quality by periodically reducing printer output
to perform xerographic print quality checks. After a print quality
check, the system automatically resumes printing at full
productivity.
prints with slightly reduced productivity at 135 pages per minute,
with seven-page images per photoreceptor revolution.
Productivity is slightly reduced because in order to maintain print
speed for papers of this size, the system must temporarily
suspend xerographic print quality checks. The 4635 maintains
the highest print quality by periodically reducing printer output
to perform xerographic print quality checks. After a print quality
check, the system automatically resumes printing at full
productivity.
XEROX 4635 LASER PRINTING SYSTEM PRODUCT REFERENCE
5-23