Epson Stylus Pro 7600 Service Manual page 109

EPSON Stylus Pro 7600/9600
Paper size detection sequence (left and right edges)
Error display:
Set the paper correctly
Transition to this sequence is allowed only at paper initial.
C H E C K
At inter-page skew checking, transition to
P O I N T
sequence for left and right edges (skew check) (p.111)
Right edge
detection
position
Operating Principles
Simplified detection
takes place.
Solid Line: Paper
Broken Line: Printable
Area
Left edge
detection
position
Print Mechanism Components
Left and right edge
detection start
CR moves to the paper presence position (100CPS).
Flashing during acceleration on Fl_Box
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
While monitoring the edge sensor output, CR moves outward
toward the printing area MAX position (350CPS). *
Paper absence detected
?
Yes
From the position where the sensor output has changed, CR
moves by 2 mm toward the home. (240CPS)
While monitoring the edge sensor output, CR moves outward
at 5 cps. The position where paper absence is detected is
judged to be the right edge position of the paper.
While monitoring the edge sensor output, CR moves toward
the home to the printing area MIN position (350CPS). *
Paper absence detected
?
Yes
From the position where the sensor output has changed, CR
moves by 2 mm outward (240CPS).
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.
Paper width>210 – 20mm
? * 4
Yes
Return
Figure 2-7. Paper Size Detection Sequence (Left and Right Edges)
Revision A
Note "*1": Paper presence position = 215.4 mm
Paper absence position = 132.9 mm
LED turns off upon completion of front
detection.
"*2": Printing area MAX position
Stylus Pro 9600:
1260.5mm + 7.0mm (Reserved width)
Stylus Pro 7600
752.5mm + 7.0mm (Reserved width)
"*3": Printing area MIN position
142.9mm –4.0mm (Reserved width)
"*4": To prevent wrong recognition as paper
presence when there is no paper as a result
of wrong detection of the rib of the platen
by the edge sensor, a paper width detected
to be not greater than A4 size - 20 mm is
2
judged to be paper absence.
No
3
No
No
Edge sensor LED is turned off.
Error
109