1. ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
  2. ZPL Commands
  3. ^JT
  • ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
^JT

^JT

The
^JT
 command allows you to change the printhead test interval from every 100 labels to any desired interval. With the
^JT
 command, the printer is allowed to run the test after printing a label. When a parameter is defined, the printer runs the test after printing a set amount of labels.

Head Test Interval

The printer’s default head test state is off. Parameters for running the printhead test are defined by the user.
Format:
^JT####,a,b,c
Parameters
Details
#### =
 four-digit number of labels printed between head tests
Values:
0000
 to
9999
If a value greater than
9999
 is entered, it is ignored.
Default:
0000
 (off)
a =
 manually select range of elements to test
Values:
N =
 no
Y =
 yes
Initial Value at Power Up:
N
b =
 first element to check when parameter
a
 is Y
Values:
0
 to
9999
Initial Value at Power Up:
0
c =
 last element to check when parameter
a
 is Y
Values:
0
 to
9999
Initial Value at Power Up:
9999
Comments:
 The
^JT
 command supports testing a range of print elements. The printer automatically selects the test range by tracking which elements have been used since the previous test.
^JT
 also turns on Automatic Mode to specify the first and last elements for the head test. This makes it possible to select any specific area of the label or the entire print width.
If the last element selected is greater than the print width selected, the test stops at the selected print width.
Whenever the head test command is received, a head test is performed on the next label unless the count is set to 0 (zero).