Instruction manual

Configuring the Printer 2-13
Defining the Backfeed Control Packet
Use the backfeed control packet (G) to enable or disable the backfeed option, set the dispense
position and the backfeed distance. Backfeed works by advancing each printed label to the
desired dispense position. Once that label is removed, the next label to be printed is backed
up underneath the printhead. In continuous mode, only the last label in the batch is advanced
to the dispense position. You may need to adjust the dispense position to allow labels to be
removed, die cut labels to be removed easily, or to prevent them from falling off.
Do not use backfeed with supplies less than 0.75 inches. We recommend using 0.5-inch gap
supplies in peel mode when backfeed is disabled.
The dispense position and backfeed distance are optional parameters and do not have to be
specified. However, they allow for greater precision when positioning the supply. You cannot
change the backfeed distance while the printer is active.
Syntax {I,G,action,dis_pos,bkfd_dis | }
G1. G Backfeed Control Packet
G2. action Action. If using one-inch RFID supplies, do not use backfeed. Options:
0 disable backfeed (default)
1 enable backfeed
G3. dis_pos Dispense Position. Adjusts the stopping point of the label. Range: 10 to 200 dots
(default 10 dots).
G4. bkfd_dis Backfeed Distance. Amount to move label backwards. 10 to 200 dots (default 10
dots). This distance can not be greater than the dispense position.
The backfeed distance should equal the dispense position. An exception is if you
are tearing instead of peeling. Then, the backfeed distance must be 30 dots
(.150 inches) less than the dispense position. However, you will have a 30 dot
non-print zone on your supply. The 30-dot difference accounts for improper tearing
of butt cut supplies, because you do not want any exposed adhesive under the
printhead.
Example {I,G,1,10,10 | }
Enables backfeed and sets the dispense position to 0.05 inches (10/203) and the backfeed
distance to 0.05 inches (10/203).
Special Considerations When Using Backfeed
Make a note of the following items:
 Be careful when tearing supplies, because the adhesive can adhere to the printhead or
platen roller.
 Backfeed affects each label in the on-demand mode or the first and last label of the batch
in continuous mode.
 When backfeed is enabled and multiple batches are sent, the printer may not backfeed
between each batch.
 Backfeed should only be used when you need to advance labels to the desired dispense
point.
 Backfeed does not interfere with the supply, print, or margin positions you have set.
 If the supply inter-label gap is not between .07 inch to .15 inch (14 to 30 dots), you must
adjust the dispense position and backfeed distance accordingly.