Printronix SL5000r RFID Smart Label and Thermal Printers - Manual (Page 143)

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143
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 Disable and Enable:
• 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.
• 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.
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.
Cal in Peel Mode
This option allows you to perform a calibration (Auto Calibrate or Pwr Up
Auto-Cal) in Peel-Off Media Handling mode.
• Disable. The printer will not permit calibration and a
“CANNOT CALIBRATE/Disable Peel-Off” message will briefly display.
Additionally, if “Pwr Up Auto-Cal” is enabled, the printer will not perform
calibration at power up.
• Enable. Auto Calibrate can be performed from the front panel, and if the
Pwr Up Auto-Cal option is enabled, calibration will be performed at power
up.
NOTE: Calibration in Peel-Off mode does not stop and wait for you to remove
peeled labels. Therefore, be prepared to remove the labels as they
are automatically peeled.
The factory default is Disable.