Xerox 4112 System Administration Manual page 50

Setups
20. Select the adjusted type, and press Save.
Squareness Adjustment
Adjust image skew (squareness) in 0.1 mm increments for Side 1 and 2. Maximum adjustment
is 1.2 mm.
Specify a positive value when you want to adjust the position of the image in the opposite
direction to the paper feed direction, and a negative value when you want to adjust the image
in the paper feed direction.
1. Check the sample output, and measure the squareness offset amount that occurred.
Use the following equation to obtain the squareness offset amount (where "A" represents
the length of the lead registration which faces the back of the machine, and "B" represents
the length of the lead registration which faces the front of the machine):
• Squareness offset amount = (A - B) × 400 ÷ 277 (when A3 paper is placed horizontally)
• (A - B) × 190 ÷ 277 (when A4 paper is placed vertically)
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Xerox 4112/4127 EPS
System Administration Guide