Printronix SLPA7000 User Manual page 93

Gap/Mark Sensor
Specifies the sensor type needed for detecting the top-of-form position on
media with label length indicators (gaps, notches, holes, or black marks).
•
Disable. Select when using media with no label length indicators (no
black marks, gaps, notches, or holes), or when you want the printer to
ignore all existing label length indicators on the installed media.
NOTE: When you select Disable, the length of each label is based on the
Label Length value entered.
•
Mark. Select when using media that has horizontal black marks located
on the underside of the label liner or tag stock. The
top-of-form position is the leading edge of the black mark.
•
Gap. Select when using media with a liner space between
die-cut labels or when using tag stock with notches or holes as label
length indicators on white background media. The
top-of-form position is the leading edge of the die cut label (trailing edge
of the gap, notch, or hole).
•
Advanced Gap. Select when using media that has liner gaps between
die cut labels with black background. The top-of-form position is the
leading edge of the die cut label (trailing edge of the gap, notch, or hole).
•
Advanced Notch. Select when using media with notches or holes that
interrupt a black vertical line on the underside of the media. The top-of-
form position is the leading edge of the die cut label (trailing edge of the
gap, notch, or hole).
The default is Disable.
Gap Sensing for Encoding RFID Tags in Smart Labels
For printers encoding RFID tags in smart labels, access the CALIBRATE
CTRL menu and set Gap/Mark Sensor to Advanced Gap and Threshold
Range to 70%, depending on the Print Profile. Run the Print Profile before
running Auto Calibrate.
Auto Calibrate
This feature is used to improve the sensitivity and reliability of the media
sensor in detecting gaps, notches, holes, or black marks on the installed
media, as well as a Paper Out condition.
To initiate Auto Calibrate, scroll to the "Auto Calibrate" menu and press the
key. The printer will advance media the distance needed to accurately detect
the label length indicators, then stop at the top-of-form position and
momentarily display the Sensed Distance. This process takes a few seconds
and results in an update of the printer values.
Auto Calibrate is completed successfully when the Sensed Distance
displayed correctly matches that of the installed media. When you select Gap,
the Sensed Distance should match the length from the trailing edge of one
gap to the trailing edge of the next gap (one label + one gap). When you
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