IBM Infoprint 6700 Series User Manual page 147

Threshold Range
This option allows the user to select the optimal threshold range for the label
stock in use. The printer defaults to using a threshold range of 50% of the
positive going pulse (see 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.
NOTE: A new threshold range will not take affect until an Auto or Manual
Calibrate is successfully performed. A Media Profile should be run
after a Calibrate to visually verify that the new range is the best
possible selection.
The range is: 10% to 90% in 10% increments
The factory default is 50%.
Paper Out Sensor
Selects which type of media sensing, Reflective or Transmissive, will be used
to detect a paper out condition. The printer automatically selects the type of
sensing based on the Gap/Mark sensing selected (see Table 6 on page 144).
NOTE: Whenever you select Transmissive, you must position the upper
media sensor directly over the lower media sensor (see "Positioning
The Media Sensors" on page 72).
The factory default is Reflective.
Manual Calibrate
Manual Calibrate is another method of improving the printer's media sensing
and is only used when Auto Calibrate has failed or the Gap/Mark Threshold or
Paper Out Threshold values derived from Auto Calibrate do not improve the
media sensors' gap or mark sensing capability.
To initiate Manual Calibrate, press ↵ when "Manual Calibrate" displays under
the CALIBRATE CTRL menu. You will then be prompted for the remaining
steps.
Example: "REMOVE RBN&MEDIA/Press Enter" or
"LOAD RBN ONLY/Press Enter" etc.
During the last stage of Manual Calibrate, the printer uses the statically
derived values, advances media, stops at the Top-of-Form position, and
momentarily displays the Sensed Distance. This process takes longer than
Auto Calibrate, and the end result is a change to the Gap/Mark Threshold,
Paper Out Threshold, and Sensed Distance values that the printer will use.
These value changes take effect immediately within the current configuration
menu.
CALIBRATE CTRL Submenus
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