B.2.3
Scan Center
This function is fully manual.
The optical middle in the driving (horizontal) direction has already been corrected by
adjusting the distance between the home position of the camera and the optical middle
position.
In contrast, the vertical middle cannot be adjusted but is found at a certain pixel position
on the CCD. If an individual scanner head is slightly tilted towards the front of the scanner,
the camera’s middle position also moves in the same direction and the scanner “sees”
more area at the keyboard side of the scanning bed.
Since all scanners have some spare pixels that are not used, the middle can be adjusted
by defining a certain number of pixels at the lower edge of the scanning bed which the
scanner should ignore.
The input field only takes positive values, the unit is pixels.
Perform the function as follows:
13. Press the Scan Center button in the
Adjustments & Support
Type in the offset value in pixels.
Picture 60: Scan Center screen
14. Press the Adjust value button to permanently store the value.
15. Click the button Back to Adjustment Menu to return to the adjustments menu.
Page 52
Setup and Assembly Manual
