Calibrating The Media Sensor; Running Auto Calibrate - Printronix T5000 User Manual

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6. Press the key to enable the displayed option. An asterisk (*) appears
next to the selection.
7. Press the PAUSE key until "OFFLINE" appears on the LCD.
8. Review the Calibrating the Media Sensor section below.
9. Perform the Auto Calibrate procedure on page 63.

Calibrating The Media Sensor

Due to manufacturing differences in media and ribbon, the Media Sensor may
have difficulty distinguishing the difference between the label and the liner or
the label and the black mark. When this occurs, the printer may intermittently
skip a label or display a fault message such as "GAP NOT DETECTED/See
Manual" or "PAPER OUT/Load Paper."
Media Sensor sensitivity and reliability can be improved by changing the Gap/
Mark Threshold and/or Paper Out Threshold values. These values can be
changed automatically by performing the Auto Calibrate or Manual Calibrate
procedure in the CALIBRATE CTRL menu or changed manually by entering
your own Gap/Mark Threshold or Paper Out Threshold values. The changes
in values take effect immediately within the current configuration menu.
Auto or Manual Calibrate is completed successfully when the displayed
Sensed Distance value correctly matches that of the installed media. When
Gap is selected the Sensed Distance should match the length from the trailing
edge of one gap to the trailing edge of the next gap (or one label + one gap).
When Mark is selected the Sensed Distance should match the length from the
leading edge of one black mark to the leading edge of the next black mark.
When you have completed Auto or Manual Calibrate, you can verify the new
values are correct by pressing the control panel FEED key several times.
Each time the key is pressed, media should advance one label and stop at the
correct Top-of-Form position of the next label.
Once the correct values are confirmed, they should be saved to the desired
configuration menu before powering off the printer. See "Saving A
Configuration" on page 72.

Running Auto Calibrate

Auto Calibrate can be initialized via the TEST PRINT key (described in detail
below), or via the CALIBRATE CTRL or DIAGNOSTIC menus in Menu mode.
NOTE: Verify that the CALIBRATE CTRL menu Gap/Mark Sensor option
(Gap, Mark, or Disable), matches the installed media. See "Sensing
Different Media Types" on page 62.
Check that the Media Sensor is horizontally positioned to permit
sensing of the label length indicators. See "Positioning The Media
Sensor" on page 61.
If you try to do an Auto Calibrate when Peel-Off Media Handling is
enabled, the LCD will display, "CANNOT CALIBRATE/Disable Peel-
Off." Before you can do an Auto Calibrate, you must select another
media handling mode.
1. Press the PAUSE key until "OFFLINE" appears on the LCD.
Running Auto Calibrate
63