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5.4.2
Burn Line Adjustment
The row of heat elements running the length of the thermal printhead is referred
to as the Burn Line. At the factory, the burn line has been adjusted to meet strict
print and bar code compliance requirements, using 6.5-mil (.0065 ) media,
enabling the printer to accommodate the majority of media types in use today.
Thermal transfer models have the Burn Line positioned slightly forward of the
Platen Roller vertex to allow the liquefied wax/ink to separate easily from the
ribbon base film and adhere to the label while still hot. While direct thermal
models have the Burn Line positioned closer to the Platen Roller vertex for more
efficient heat transfer.
If media with a different thickness or rigidity is used (e.g., tag stock), a
Printhead Burn Line adjustment may be needed if the print quality has been
adversely effected. A forward adjustment will correct this. Conversely, a
backward adjustment will correct for a change when using extremely thin media.
To perform a Burn Line adjustment:
n
With the printer loaded with media (and ribbon, if thermal transfer
printing), lower and rotate the Printhead Latch to the locked position.
o
Loosen the two Locking Screws.
p
Turn the Adjustment Screws counter-clockwise until the Burn Line is past
the Platen Roller vertex. Print a Validation Label from the Quick Test
menu. The label should look light and uneven.
q
Tighten the Locking Screws just until they are 'snug'– tight enough to
remove any play in the printhead assembly, yet loose enough to allow the
Adjustment Screws to move the printhead.
(Continued next page)
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