Zebra Technologies Strata Thermal Printers - Manual (Page 40)

Top Of Form
Sensing
To accommodate different media and media
dimensions, your printer is equipped with sen-
sors capable of detecting the top of form for la-
bels or tags. Two methods are used by the
printer for top of form sensing: gap sensing and
black mark sensing.
Gap Sensing The gap sensing feature depends on the ability
of the movable transmissive (gap) sensor to
“see through” the label liner between labels.
Label and label backing liner opacity vary due
to manufacturing differences in label stock. The
sensor may have difficulty distinguishing the
difference between labels and the liner and may
require the user to AutoSense the media. Gap
sensing is standard on all printers and the sensi-
tivity is set with the AutoSense feature.
Black Mark
Sensing
The black mark sensing feature depends on the
printer’s fixed position, reflective (black mark)
sensor. The sensor is in the middle of the media
path. The black mark sensor is used with special
labels that have a black mark printed on the back
of the label liner or tag between each label or tag.
Black mark sensing is standard on all printers.
Continuous Media If the media is continuous (fax or plain paper)
with no marks notches or gaps, then the top of
form and form length must be set by program-
ming. The transmissive sensor senses media
out. For proper operation, the printer needs to
measure the length of the form.
See the Q command in the EPL2 programming
manual for setting the form length of continuous
media with no label gaps, black line mark or
notch hole.
32
980181-001 Rev.C
Operation