Dell 3115CN - Preregistration

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Chapter 6 Principle of Operation (Scanner)
Version 1 2006.11.21
9.2.4 Preregistration
In the preregistration step, the document sheet (fed to the Takeaway Roll in the prefeed step) is fed to
the Regi Roll. The lead edge of the document sheet is then fed from the Regi Roll to the scan feed
reference position (Wait Position), located upstream from the CVT position, where the document stops.
This operation accomplishes registration of the lead edge of the document.
When the document sheet is fed to the Takeaway Roll, the ADF Motor drives the Takeaway Roll. The
Takeaway Roll then feeds the document sheet to the Regi Roll. When the Regi Sensor detects the
document sheet, the ADF Motor rotates to drive the Regi Roll and Exit Roll. The Regi Roll feeds the
document sheet (fed from the Takeaway Roll) to the scan feed reference position.
9.2.5 Scan Control
Scanning of the image illuminated with the Exposure Lamp of the Scanner ASSY is controlled by
changing the feed speed according to the copy magnification.
When the document sheet passes the CVT position at the specified speed, the images on the
document sheet are exposed by scanning with the Exposure Lamp of the Scanner ASSY, and read by
the CCD Image Sensor.
Gnb06005KA
Regi Roll
CVT Position
Takeaway Roll
Regi Sensor