EPSON Stylus Pro 7400/7800/9400/9800
Revision B
Operating Principles
Print Mechanism Components
155
P EDGE (Paper Width Detection) Sensor
This sensor, mounted at the left-bottom side of the carriage unit, detects paper
edges by moving the carriage.
It detects four points of paper edges, namely, left and right points on the front edge
and a front point on the left and right edges of the paper. Each position is
calculated from the difference in reflection value between the platen and the paper.
A reflective type photosensor is used. Each paper edge position (presence or
absence of paper) is determined by an A/D converted value of the output from the
photosensor.
During printing, the sensor monitors the left and right edges of the paper to detect
a skew.
Detecting distance up to the paper surface:
=3mm to 10mm (Sensor Peak: 7 mm)
NOTE:
It is possible to turn this sensor OFF by
The following pages show paper size detection sequence (left and right edges and front
edge).
Figure 2-5. Carriage Unit Paper Width Detection Sensor
C H E C K
P O I N T
It must be ensured that the reflection value of the least
reflective paper is greater than the reflection value of the
platen.
The paper must be free from floating at the detection point.
If external light, such as sunlight, can enter the sensor due to
the construction, mis-detection must be prevented by LED ON/
OFF control. (Same as with Stylus Pro 7000)
In this printer, the P EDGE Sensor works also to detect the
paper front edge. (Same as the Stylus Pro 7600/9600)
Left edge
Carriage
HP Side
P_EDGE sensor
Right edge
Scanning to the opposite
side from the HP side
Scanning to the HP side
from the opposite side
Содержание Stylus Pro 7400
Страница 1: ...EPSONStylusPro7400 7800 9400 9800 Large Format Color Inkjet Printer SERVICE MANUAL SEIJ05002 ...
Страница 10: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 147: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 170: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 207: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Страница 292: ...C H A P T E R 5 ADJUSTMENT ...
Страница 373: ...C H A P T E R 6 MAINTENANCE ...
Страница 380: ...C H A P T E R 7 APPENDIX ...
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Страница 395: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 02 R ev 01 C594 CAS E 021 152 150 152 152 152 151 ...
Страница 396: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 03 R ev 01 C594 E LE C 011 202 201 200 ...
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Страница 398: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 05 R ev 01 C594 POWE 011 300 301 302 ...
Страница 403: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 10 R ev 01 C594 ME CH 051 700 701 X15 700 ...
Страница 407: ...900 901 906 901 905 903 903 904 PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 14 R ev 01 C594 ME CH 091 902 ...
Страница 409: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 02 R ev 01 C595 CAS E 021 150 151 152 152 152 152 ...
Страница 410: ...R ev 01 C595 E LE C 011 200 201 202 PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 03 ...
Страница 411: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 04 R ev 01 C595 E LE C 021 204 203 ...
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Страница 417: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 10 R ev 01 C594 ME CH 051 701 X15 700 700 ...
Страница 421: ...900 901 906 901 905 903 903 904 PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 14 R ev 01 C595 ME CH 091 902 ...