Datamax W-Class, Maintenance Manual

Page: 23 / 211

Adjustments and Maintenance
2-13
2.2.3 Burn Line Adjustment

This adjustment is NOT REQUIRED during a normal printhead replacement.
The Printhead Burn Line is the row of thermal elements that creates the image on the label. At the factory,
the Burn Line is adjusted to strict compliance using 6.5-mil (.0065 inch) media, enabling the printer to
maintain print quality across a majority of media types.
Depending upon the equipped printing option, the alignment is different. The position of the burn line on
direct thermal models is over the platen roller vertex for maximum heat transfer. Conversely, the position
of the burn line on thermal transfer models is slightly forward of the vertex to allow the wax/ink to
separate easily from the ribbon base film and adhere to the label while hot.
In extreme cases, when media with a different thickness or rigidity is used (heavy tag stock, for example),
this relationship can change. To compensate for the change, first try the suggestions in Section 1.5 of the
Operator’s Manual
, and in Sections 2.2.1, and 2.2.2 of this manual. If the print quality remains
unacceptable, then an adjustment may be required. In most cases, the burn line requires a slight forward
adjustment for thicker media, while thinner media requires a slight backward adjustment. Adjust the Burn
Line as follows:
 With media installed (and ribbon, if thermal transfer printing), lower the printhead assembly and
rotate the Printhead Latch completely back, to the locked position. Disengage the Leveling Cam.

Loosen the two Anchor Screws.
 Begin printing. Enter the Quick Test Mode then select 100 Print Quality Labels; see the
Operator’s
Manual
for details.
 Rotate the Burnpoint Adjustment Screws (making only small changes each time) adjusting for the
best print quality across the label.

Note: When unevenly adjusted, the print will tend to fade on toward one side of the label.
 Tighten the Anchor Screws. Retest, and repeat if necessary.