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EPSON Stylus Pro 7600/9600 Revision A
Operating Principles Print Mechanism Components 111
Simplified detection sequence for left and right edges (skew check)
When the paper width detection function is turned off, left and right edge
detection (skew check) is not carried out.
Error display:
1: Set the paper correctly
2: PAPER NOT STRAIGHT
a
Figure 2-9. Simplified Detection Sequence for Left and Right Edges
(Skew Check)
C H E C K
P O I N T
Transition to this sequence is allowed only at inter-page skew
checking (at cut/eject, etc.) At paper initial, transition to “Paper size
detection sequence (left and right edges)” (p.109) takes place.
Solid Line: Paper
Broken Line: Printable
Area
Right edge
detection position
Left edge
detection position
Previously determined
paper width X mm
Paper absence detected
?
Left and right edge
detection start
No
CR moves to the paper presence position (100CPS).
Flashing during acceleration on Fl_Box
Note "*1": Paper presence position = 215.4 mm
Paper absence position = 132.9 mm
LED turns off upon completion of skew
check.
"*2": Printing area MIN position
=142.9 mm –4.0 mm (Reserved width)
A4 size (210.0 mm) – 20.0 mm = 190.0
mm
Edge sensor LED is turned off.
Error 2
Yes
Moving to paper absence position. Threshold value is
calculated during moving to paper presence position. After
determination of threshold value, edge sensor LED is kept on.
*
1
CR moves to the position "printing area MIN position + A4
size - 20 mm = 328.9 mm" (350CPS) *
2
While monitoring the edge sensor output, CR moves toward
the home to the printing area MIN position (350CPS).
From the position where the sensor output has changed, CR
moves by 2 mm outward (240CPS).
Paper right edge
position deflected by 3 mm from previously
determined position?
Yes
No
While monitoring the edge sensor output, CR moves toward
the home at 5 cps. The position where paper absence is
detected is judged to be the left edge position of the paper.
The paper width determined by the previously executed left
and right edge detection (at paper initial or skew check) is
added to the left edge position. The resultant position is
regarded as the paper right edge position.
Paper left edge
position deflected by 3 mm from previously
determined position?
Yes
No
Edge sensor LED is turned off.
Error 1
Edge sensor LED is turned off.
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