Printronix T4204 - Manual (Page 95)

Printer Control Menu
95
Calibrate
This feature is used to optimize the sensitivity of the Transmissive or
Reflective sensors (whichever is selected in the Media Sensor sub-menu) in
being able to detect the TOF (Top-of-Form) position of the current media
installed. The sensitivity can be adjusted manually by changing the Refl Value
or Trans Value menu settings or can be determined automatically by using
the Run Calibrate procedure.
The change in values (derived automatically or manually entered) take affect
immediately within the current configuration menu. They can be saved into
non-volatile memory (menu’s 1-8 only) by using the Save Configuration
procedure. We highly recommend that you take advantage of the Trans or
Refl Values automatically determined by the Run Calibrate procedure before
attempting to make any manual changes to the Values. If the Run Calibrate
procedure fails to determine the proper values and ends with a fault message
displayed (“GAP NOT DETECTED” or “LOAD PAPER”), you can manually
enter the Refl Value or Trans Value and press the FEED key to determine if
the gap or black stripe can be consistently detected.
• Run Calibrate. Pressing the ENTER key with Run Calibrate displayed
initializes the automatic calibration procedure. This advances the media a
minimum of 11 inches plus the distance required to detect 3 additional
TOF positions. The procedure is successfully completed if no fault
message is displayed and the Sensed Distance value is correct. The
result is that the Refl Value or Trans Value (depending on which media
type is installed) and the Sensed Distance value will be determined
automatically.
• Refl Value. Value representing the sensitivity for distinguishing the
difference between the black mark and label liner or tag stock for
Reflective media. The value range is (0-20) and the default value is 10.
This value can be determined automatically by using the Run Calibrate
procedure or can be entered manually. Too high a value causes a “GAP
NOT DETECTED” error message displayed, too low a value causes a
“LOAD PAPER” error message.
• Trans Value. Value representing the sensitivity for distinguishing the
difference between the label and the transmissive gap (hole, notch or
label liner) for Transmissive media. The value range is (0-20) with a
default of 10. This value can be determined automatically by using the
Run Calibrate procedure or can be entered manually. Too high a value
causes a “LOAD PAPER” error message displayed, too low a value
causes a “GAP NOT DETECTED” message.
• Sensed Distance. This value (in inches) represents the distance that
was sensed between the TOF of one label to the TOF of the next label.
With Transmissive media installed the distance equals the physical label
length + one transmissive gap, notch or hole. With Reflective media
installed the distance equals the trailing edge of one black mark to the
trailing edge of the next. The factory default for Sensed Distance is 0.00
inches. This value is automatically determined only after successful
completion of the Run Calibrate procedure and cannot be changed
manually.