Printronix t8000 Administrator's Manual page 88

This option allows you to perform a calibration in Peel-Off Media Handling
mode. 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.
Disable
Enable
Factory
IMPORTANT
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.
Disable
Enable
Factory
88
Sensors > Calibrate > Cal in Peel Mode
Calibration from the panel when in peel mode is not
permitted and a warning message will display.
Auto Calibrate can be performed from the front panel in
peel mode.
Disable
If this menu is set to Disable, then Power-Up
Action = "Auto-Cal" is ignored.
Sensors > Calibrate > Gap Windowing
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.
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