Epson 7600, 9600 service manual Operating Principles Print Mechanism Components 109

EPSON Stylus Pro 7600/9600 Revision A

„Paper size detection sequence (left and right edges)

Error display:

Set the paper correctly

CHECK Transition to this sequence is allowed only at paper initial.

	Note	"*1": Paper presence position = 215.4 mm
Left and right edge		Paper absence position = 132.9 mm
detection start		LED turns off upon completion of front
		detection.
		"*2": Printing area MAX position
CR moves to the paper presence position (100CPS).		Stylus Pro 9600:
Flashing during acceleration on Fl_Box		1260.5mm + 7.0mm (Reserved width)
		Stylus Pro 7600
		752.5mm + 7.0mm (Reserved width)

POINT At inter-page skew checking, transition to Simplified detection
sequence for left and right edges (skew check) (p.111) takes place.
		Solid Line: Paper
		Broken Line: Printable
		Area
	Right edge		Left edge

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). *2

"*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 judged to be paper absence.

detection	detection
position	position

Paper absence detected	No
?

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). *3

Paper absence detected	No
?

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		No
? *4
	Yes		Edge sensor LED is turned off.
Return			Error

Figure 2-7. Paper Size Detection Sequence (Left and Right Edges)

Operating Principles Print Mechanism Components 109