Defining The Backfeed Control Packet; Special Considerations When Using Backfeed - Avery Dennison ADTP1 Reference Manual

D e f i n i n g t h e B a c k f e e d C o n t r o l P a c k e t
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. Adjust
the dispense position to allow labels to be removed, die cut labels to be removed easily, or to
prevent them from falling off. While the printer is active, the backfeed distance cannot be
changed.
Do not use backfeed with supplies less than 0.75 inches. Use 0.5-inch gap supplies in peel mode
when backfeed is disabled.
The dispense position and backfeed distance are optional parameters that do not have to be
specified. However, they allow for greater precision when positioning the supply.
Syntax
{I,G,action,dis_pos,bkfd_dis | }
G1. G
G2. action
G3. dis_pos
G4. bkfd_dis
Example
{I,G,1,50,20 | }
Enables backfeed and sets the dispense position to 0.25 inches (50/203) and the backfeed
distance to 0.10 inches (20/203).

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 to advance labels to the desired dispense point.
♦ Backfeed does not interfere with the set supply, print, or margin positions.
♦ If the supply inter-label gap is not between .07 inch to .15 inch (14 to 30 dots), adjust the
dispense position and backfeed distance accordingly.
Backfeed Control Packet
Action. If using one-inch RFID supplies, do not use backfeed.
Options:
0 disable backfeed (default)
1 enable backfeed
Dispense Position. Adjusts the stopping point of the label.
Range: 50 to 200 dots (default 65 dots).
Backfeed Distance. Amount to move label backwards. 10 to 200
dots (default 65 dots). This distance cannot be greater than the
dispense position.
The backfeed distance should equal the dispense position.
When tearing supplies (instead of peeling), the backfeed
distance must be 30 dots (.150 inches) less than the dispense
position. The 30-dot difference accounts for improper tearing of
butt cut supplies to prevent exposed adhesive under the
printhead. However, that adds a 30 dot non-print zone on the
supply.
Configuring the Printer 2-17