Oki LD670, User Manual

Page: 5 / 1345

3
Notes on Use
Notes on printing and the paper used
(1) Printing at a high rate might result in unclear printing. If this problem occurs,
adjust the printing rate. Alternatively, adjust the print speed and print density so
that there are no blurs.
(See Examples (1) and (2) in Section 10-2, "Setting Up the Printer.")
(2) Printing characters from a non-standard character set e.g. in a thin serif font will
result in the characters appearing very faint. Use a bold sans serif font.
(3) For quality printing that is free from uneven spacing and condensed or elongated
printing after paper is cut or printing is paused, resume printing following a paper
feed of at least 1 mm (8 dots).
(4) If the data transfer rate is too low, serial printing may result in uneven print
density (vertical white marks may appear on printouts) because of repeated
printing and pausing. If priority is placed on print quality, use batch printing
mode.
(See Example (8) in Section 10-2, "Setting Up the Printer.")
(5) The printer shipped from the factory is preset to the darkest print density
(130%). If this setting is inappropriate, specify a lighter print density.
(See Example (1) in Section 10-2, "Setting Up the Printer.")
(6) If roll paper with an outside core diameter of other than 32 mm is used, the
paper-near-end detection accuracy deteriorates.
If roll paper with an outside core diameter of less than 32 mm is used, a transport
error may occur when the cutter cuts the paper in full cutting mode and reaches
the core.
(7) Since the difference in hue between red and black or blue and black may not be
noticeable when two-color thermal paper is used, be sure to confirm in advance the
color of the printed characters.
(8) When roll paper with a width of 83 mm is used, characters that are too close to the
(left or right) edge of the paper may not be printed because of inaccuracies in
tracking. Be sure to set a margin of sufficient width.
(9) Do not switch from narrow paper to wide paper (e.g., from paper that is 58 mm
wide to paper that is 80 mm wide) during operation. When narrow paper is used,
the thermal head area where there is no paper comes in direct contact with the
platen roller, and the resulting wear on the head may lead to a deterioration in
print quality. Similarly, if the paper width is changed, the cutter blade will cut at
a location that has no paper, and the resulting wear on the blade may lead to
improper cuts. To switch from narrow paper to wide paper, exchange the thermal
head and the cutter blade.