Epson PERFECTION V700 PHOTO - Drive Mechanism Operation

EPSON Perfection V700 Photo Revision A
Operating Principles Engine Operation Outline 22
2.1.3 Drive Mechanism operation
Carriage Drive Mechanism Operation
A document is scanned in two directions. The primary direction is right-
to-left along a single-pixel-wide line parallel to the carriage, between the
lamps. Subsequent lines are scanned in the secondary direction by
moving the carriage. See Figure 2-4.
To maximize performance, the scan-light beam data are processed by
the ISN board while the next line is being scanned.
Figure 2-4. Carriage Movement
The Carriage Unit slides along the guide shaft in the secondary scanning
direction. The CR (Carriage) Motor transmits its drive power to the CR
Drive Belt attached to the Carriage Unit, via the Drive Pulley and
Deceleration Gear. See Figure 2-5. The CR Motor is a stepper motor
under open loop control. The image data scanning start position is
determined by the CR Home Position (HP) Sensor located on the
Control Board.
Figure 2-5. Carriage Operation
1pixel
Main
scanning
Subscanning(byCarriagemovement)
ScannerHead
(Carriage)
Document
Secondline
Firstline
Front
Rear
CarriageUnit
DrivenPulley
CRDriveBelt
DrivePulley
CRHPSensor
Carriageshaft
DecelerationGear
CRMotor