Oki IP-6620 Maintenance Manual page 537

(6) Print head R/L adjustment
A function in the control firmware to correct the dot spotting position in the main scanning
direction. The dot spotting position is matched for the R line and the L line for each head.
Correction is performed by using the dot spotting position of the R line as reference and adjusting
the ink discharge timing for the L line.
(7) Sensor (side) position adjustment
A function in the control firmware to correct the print start position in the width (side) direction of
the media. Fluctuation in distance (installation position) between the edge sensor and head is
corrected. Correction is performed by measuring the distance from the media edge to the print
start position and adjusting the print start position so that it has a standard distance.
(8) Sensor (top) position adjustment
A function in the control firmware to correct the print start position in the feeding (top) direction of
the media. Fluctuation in distance (installation position) between the edge sensor and head is
corrected. Correction is performed by measuring the distance from the media edge to the print
start position and adjusting the print start position so that it has a standard distance.
(9) Feeding adjustment
A function to adjust the media feeding length by the control firmware. It corrects the difference in
feeding length due to media characteristics (such as thickness), printing mode, switching of
pressure of the pressure roller, availability of the take-up reel unit, and FORWARD ONLY and
BACK & FWD LOW advance modes, to reduce banding (joint of passes).
(10) Print head rest interval and print head rest time
A function used to execute scanning at the specified interval.
When the ink takes time to dry on some media, printing failures including blur can be prevented
by scanning after the ink dries completely.
(11) Media advance mode
When using flexible media such as banner, the back of the media may stick to the paper guide or
the platen, and the feeding operation may be interrupted.
In such cases, use one of the following advance modes that prevent the media from sticking:
BACK & FWD LOW, BACK & FWD HIGH, and BACK & FWD MAX.
In FORWARD ONLY mode, the media is advanced normally.
BACK & FWD LOW is an advance mode that prevents the media from sticking. In this mode, an
operation to separate the media from the platen is performed when printing starts and after a
pause.
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OKI Data Infotech Corporation CONFIDENTIAL
Chapter 8 Operation Mechanism