User's Manual

CALIBRATE CTRL Submenus
129
Gap Windowing
This feature compensates for any early falling edges or spurious peaks and
troughs that may appear within the gap length in media. These edges or
peaks and troughs can cause unreliable detection of the leading edge of the
next label (top-of-form). Use Gap Windowing to resolve the following
problems:
• Loss of one or more complete (serialized) labels.
• Start of an image printed in the middle of a gap, especially with fanfold,
perforated media.
• Top part of an image lost when printing in head-first orientation.
The options for Gap Windowing are Enable and Disable:
• Enable. When the leading edge of a gap is detected, the printer ignores
the first 90% of the gap length value specified in the Gap Length menu
option. The result is that cross perforations or unusual media
discrepancies within the gap are filtered out, allowing the printer to
reliably detect the actual leading edge of the next label and use it as the
TOF position.
• Disable. When the leading edge of a gap is detected, the printer
continuously looks for the leading edge of the next label and uses it as the
TOF position. Perforations or unusual media discrepancies within the gap
can cause inaccurate TOF detection.
The factory default is Disable.
Gap Length
Gap Length is the actual length (height) of a label gap measured in .01 inch
increments. The range is 0.05 to 1.00 inches.
NOTE: You must enter the correct Gap Length. If the Gap Length is too long,
the image will shift down from the leading edge (TOF) of the label.
The factory default is 0.12 inches.
Min Calib Delta
Minimum Calibrate Delta changes the minimum threshold value the sensor(s)
require to detect the difference between the label and a gap, notch, hole or
black mark. This allows bolder gaps (such as notches or holes) to be used as
the TOF while intermediate gaps (liner) can be ignored. Increasing the Min
Calib Delta makes the sensor(s) less sensitive to intermediate gaps and
noise. Decreasing the Min Calib Delta makes the sensor(s) more sensitive for
detecting gaps on low contrast media, where there is very little difference
between the label and the gap (liner).
The range is 012 - 050.
NOTE: When Gap/Mark Sensor = Disable, Gap, or Mark, the default is 12.
When Gap/Mark Sensor = Advanced Gap or Advanced Notch, the
default is 20.