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Centring is performed using an InoTec test sheet. The test sheet is placed in the scanner centred (without
play at the side paper guides). Drive the sheet into the scanner until the centre line on the sheet is in the
scan slot. Press F1 fifteen times to enlarge the display. Press F11 to display each pixel. Use the arrow
keys to scroll to the centre (auxiliary line 2522). Use set-screw (C) to centre the camera. Next, adjust
focus. Loosen the set-screw in the lens holder; turn the lens holder till maximum deflection is achieved.
Fasten camera and lens holder and check centre setting again.
Center & Focus setting
Set CCD sample delay ( „D" key). When completed insert sheet in landscape mode and perform white
calibration ( „M" key).
Completed white calibration
Focus is checked by scanning at 400dpi. All image processing options (cropping, deskew, filters, etc.)
have to be switched off and a fixed threshold must be used. Use the InoTec test sheet for this purpose.
Focus is OK when the direction of the DIN test symbols (screw heads) is at least 50% recognizable at a
value of 60. The grey scale's raster should be resolved in at least 5 – 8 fields. If these conditions are not
met, focus has to be re-adjusted.
®
SCAMAX
Tech. Manual 06/2002
T-23
2600/4000
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