Xerox ColorQube 9303 Series, Service Manual, Page: 753 / 1812

February 2013
3-107 ColorQube® 9303 Family
IQS 1
Image Quality
IQS 1 Registration and Skew
Image Registration
Table 1 lists the registration specifications of the DADH, IIT and IOT.
Skew
To measure skew use this formula, Figure 1 .
Skew (mrads) = Leading edge margin at rear corner (1) minus leading edge margin at front
corner (2) divided by (media width - 8.6 mm) multiplied by 1000.
Refer to Table 2 for the skew specifications in mrads.
• Skew for envelopes will exceed the limits stated.
• Skew for A5 / 8.5 x 5.5 shall be +/- 10 mrads.
Table 3 lists the skew specifications (mm) for the standard paper sizes.
NOTE: The measurement for skew and margin for Side 1 and Side 2 may not match
Margins
Refer to Figure 1 . Process direction margin is measured on the leading edge at the center (3).
Cross-process margin is measured on the rear edge near the leading edge corner (4).
Figure 1 Skew and margin measurement
Table 1 Registration Specifications
Registration
Document
Glass
DADH Print IOT
Document
Glass Scan
IIT
DADH Scan
IIT
Process direction
±
2.1 mm
±
2.6 mm
±
2.0 mm
±
0.7 mm
±
1.7 mm
Cross-process
±
2.6 mm
±
4.1 mm
±
2.5 mm
±
0.7 mm
±
3.2 mm
Table 2 Skew Specifications (mrads)
Document
Glass
DADH Print IOT
Document
Glass Scan
IIT
DADH Scan
IIT
Skew specification
±
6.2 mrad
±
9.0 mrad
±
5.4 mrad
±
3.1 mrad
±
7.2 mrad
Table 3 Skew Specifications (mm)
Media
Media Size
(mm) Document
Glass
DADH Print IOT
Document
Glass
Scan IIT
DADH
Scan IIT
A4 long edge 297 mm
±
1.79 mm
±
2.6 mm
±
1.56 mm
±
0.89 mm
±
2.8 mm
A4 short edge 210 mm
±
1.25 mm
±
1.81 mm
±
1.09 mm
±
0.62 mm
±
1.45 mm
8.5 x 11 inch
long edge 279 mm
±
1.68 mm
±
2.43 mm
±
1.46 mm
±
0.84 mm
±
1.95 mm
8.5 x 11 inch
short edge 216 mm
±
1.29 mm
±
1.87 mm
±
1.12 mm
±
0.64mm
±
1.49 mm
Lead edge skew
Cross process margin