Change Backfeed Sequence
The ~JS (Change Backfeed Sequence) instruction is used to control
the backfeed sequence. This instruction can be used on printers both
with and without built-in cutters.
The primary applications are: 1) to allow programming of the “rest
point” of the cut edge of continuous media, and 2) provide immediate
backfeed after peel-off when the printer is used in a print/apply appli-
cation configuration.
This instruction only stays in effect until the printer is powered OFF, a
new ~JS instruction is sent or it is changed on the front panel. When a
~JS instruction is encountered, it will supersede the current ‘front
panel’ setting for the Backfeed Sequence.
NOTE: The ~JSx instruction has replaced the ^XBA and ^XBB
instructions (found only in ZPL Version 8.1.0). ^XB operates
normally. ~JS is not applicable to Zebra STRIPE Printers.
The most common way of eliminating backfeed is to operate in re-
wind mode. Rewind mode does not backfeed at all. After a label is
printed, the leading edge of the next label is placed at the print line.
This eliminates the need to backfeed and does not introduce a non-
printable area at the leading edge/bottom of the label. It also does not
allow the label to be taken from the printer since it is not fed out from
under the printhead.
Running in another mode with backfeed turned off allows the label to
be taken and eliminates the time overhead of the backfeed sequence. It
does introduce a 1-inch, non-printable area at the leading edge/bottom
of the label on 170PAX printers in applicator mode.
266 ZPL II COMMAND REFERENCE
~JS
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