EPSON Stylus CX4100/CX4200/CX4700/CX4800/DX4200/DX4800/DX4850
Revision A
OPERATING PRINCIPLES
Scanner Mechanism
77
2.3.1.2 Scanner Carriage Unit Movement Overview
Scanning image is performed in the main scan direction (=1 line) by the CCD sensor
and in the sub-scan direction (=several lines) combined with Scanner Carriage Unit
movement. (refer to the figure below)
Line type, color CCD sensor can scan 1 line in main scan direction (parallel to the
Scanner Carriage Unit) by one time. When scanning next lines after the second line in
sub-scan direction, CR driving moves the Scanner Carriage Unit, which has CCD
sensor inside, and scan the other lines. The scanned data is sent to the control board.
The scanned data for “n” lines and “n-1” line are processed consecutively.
Figure 2-15. Scanner Carriage Unit movement
The table below shows the specifications for the stepping motor that controls the
Scanner Carriage Mechanism.
Drive of the Scanner Motor is transferred to the Scanner Carriage Unit by the Scanner
Timing Belt. The Scanner Carriage Unit slides in the secondary scanning direction.
The Scanner Motor uses a stepping motor and drives using open loop control.
When the HP detection flag of the Scanner Carriage Unit disrupts the signal of the
Scanner HP Sensor, the Scanner HP Sensor outputs a high signal, and the Scanner
Carriage Unit is determined to be in the home position.
Figure 2-16. Scanner Carriage Unit Mechanism
Table 2-6. Scanner Motor specifications
Item
Description
Motor type
PM type stepping motor
Drive voltage
42V (DC)
Coil resistance
37
Ω
± 10% (per phase at 25 degrees)
Inductance
TBD
mH ±
TBD
% (1KH 1Vrms)
Driving method
PWM
Driver IC
A6627
1st line
2nd line
1 pixel
Main-scan
direction
Sub-scan direction by Scanner Carriage Unit movement
Document
Scanner Carriage
Unit
Right side
Left side
Flag
Scanner Motor
Scanner HP Sensor
Scanner Carriage Unit
Summary of Contents for CX4200 - Stylus Color Inkjet
Page 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 60: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 87: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 121: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Page 171: ...C H A P T E R 5 ADJUSTMENT ...
Page 187: ...C H A P T E R 6 MAINTENANCE ...
Page 194: ...C H A P T E R 7 APPENDIX ...
Page 221: ...Model PX A650 Stylus CX4700 CX4800 DX4800 DX4850 Board C571 PNL Rev D Sheet 1 1 ...
Page 222: ...Model Stylus CX4100 CX4200 DX4200 Board C577 PNL Rev A Sheet 1 1 ...