Epson 9600, 7600 service manual „ Paper size detection sequence front edge, Conditions

EPSON Stylus Pro 7600/9600 Revision A

„ Paper size detection sequence (front edge)

Front edge detection start	Note "*1": Paper left upper detection position =
	Paper left edge position +27.5mm

Conditions:

For execution of this processing, the paper level threshold value must be

known. (Execute this processing after detection of the right and left edges.)

Error display:

Set the paper correctly

When the paper width detection function is turned off, use the paper size front

position as the user paper setting position. (On the assumption that detection

is not made by the edge sensors)

CR moves onto Fl_Box. (350CPS)

CR moves to the paper left upper detection position. *1

While monitoring the edge sensor output, PF moves in the

negative direction (picks up paper). (40CPS)

PF stops if paper absence is detected. *2

Paper absence detected	No
?

Yes

While monitoring the edge sensor output, PF moves in the positive direction (gets paper off). (5CPS) The position where paper presence is detected is judged to be the left front edge position of the paper. *3

CR moves to the paper right upper detection position.

(350CPS) *4

No	Paper absence detected by
	edge sensor?

Yes

While monitoring the edge sensor output, PF moves in the positive direction (gets paper off) (40CPS). PF stops if paper presence is detected. (Prevention of skew at leading edge) *3

Paper presence detected	No
?

Yes

While monitoring the edge sensor output, PF moves in the

negative direction (picks up paper) (40CPS).

PF stops if paper absence is detected. *2

Paper absence detected	No
?

Yes

While monitoring the edge sensor output, PF moves in the positive direction (gets paper off) (40CPS). The position where paper absence is detected is judged to be the right front edge position of the paper. *3

The paper left front edge position and the right front edge position are compared and the one in the positive direction (upper one) is judged to be the paper size front position. *3

Edge sensor LED is turned off.

Return

"*2": PF maximum travel = –260mm (Self-diagnostics mode –340mm) No change in sensor output even when this travel has been exceeded is handled as an error.

Stylus Pro 9600: 1260.5mm + 7.0mm (Reserved width)

Stylus Pro 7600: 752.5mm + 7.0mm (Reserved width)

"*3": PF moving target position = 1st nozzle position (0.00 mm)

No change in sensor output even when this position has been passed is handled as an error.

"*4": Paper right upper detection position =

Paper right edge pos. –27.5mm

"*5": In the figure below, the left upper leading edge is handled as the paper size front position. (On the assumption that the paper front edge is not correctly perpendicular to the paper feed direction)

Solid Line: Paper

Broken Line: Printable

Area

	Detection
	position for left
Detection
	upper leading
position for	edge position
right upper
leading edge
position

Edge sensor LED is turned off.

Error

Figure 2-8. Paper Size Detection Sequence (Front Edge)

Operating Principles Print Mechanism Components 110