Printronix t8000 Administrator's Manual page 91

Sensors > Calibrate > Threshold Range
This option allows the user to select the optimal threshold range for the label
stock. The printer defaults to using a threshold range of 50% of the positive
going pulse (see Sensors > Diagnostics > Media Profile) that represents
each gap, notch or mark detected after doing an Auto or Manual Calibrate.
The printer then detects anything within the label with that threshold range as
TOF. While this range is ideal for most medias, some labels with a preprinted
image, liner gap or inlay can confuse the media sensor(s) causing a false
TOF detection. In most cases this can be resolved by selecting a higher
threshold range so the printer will only trigger on the true TOF (gap, notch or
mark) position.
Minimum 5%
Maximum 95%
Factory 50%
A new threshold range will not take effect until
Calibration is successfully performed. A Sensors >
IMPORTANT
Diagnostics > Media Profile should be run after a
Calibrate to visually verify that the new range is the
best possible
Sensors > Calibrate > Mark TOF Detect
This menu controls how the TOF will be detected for Mark media.
Mark Lead The leading edge of the mark will be used as the TOF
Edge and printing will begin here.
The trailing edge of the mark will be used as the TOF
Mark Trail Edge
and printing will begin here.
Factory Mark Lead Edge
selection.
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