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4.6.3 PAPER SKEW CORRECTION
After the paper has arrived at the registration roller:
17. First, the machine does a pre-check. The DRESS sensor detects the right edge of
the paper to see if the paper edge is within ±10 of deviation from the right edge. (If
the paper size is greater than 304.8 mm (12"), the paper edge must be within ±6
mm.)
If the amount of skew is not within range of pre-check:
The paper feed motor and vertical motor both reverse and the paper is
rewound back onto the paper roll.
The leading edge of the paper must be fed manually from the roll unit and the
sequence is done again.
The operator should check the roll to make sure that the clamps are locked
and that the roll is set correctly.
18. If the amount of skew is within range of pre-check, the horizontal motor ON >
Carriage moves to the leading edge detect position.
19. The roll paper feed motor and vertical motor switch ON again.
20. When the DRESS sensor detects the leading edge of the paper, it allows paper to
feed 100 mm and switches the paper feed motor and vertical motors OFF.
21. The horizontal motor switches ON and moves the carriage to the left side of the
machine.
22. The paper feed motor and vertical motor both switch on and feed the paper 60
mm.
23. Now, the paper feed motor reverses while the vertical motor continues to feed the
paper forward. This takes up any slack in the paper to correct skew, and then both
motors go OFF.
24. Paper transport fan remains ON.
25. The horizontal motor switches ON and moves the carriage to the right edge and
stops > DRESS sensor detects right edge again.
26. If the amount of deviation is within ±5 mm, paper registration ends and the
sequence continues without interruption.
If the deviation is not within ±5 mm, the paper is released, the vertical motor and
paper feed motors reverse feed, and the paper rewinds onto the roll.
27. The paper feed sequence continues from Step 18 of "Paper Feed Sequence
When First Roll is Set" above.
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Detailed Descriptions
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