Label-Movement Commands; Form Feed Command (<Esc> E); Short Form Feed Command (<Esc> G); Skip "N" Lines Command (<Esc> F 1 N) - Dymo LabelWriter 450 Duo Label Printer Technical Reference Manual

The 450 series printers do not compare the label length variables sent by the host with the actual
length of the currently loaded label stock. The printers only use the information provided to
maintain the logical position counter. In addition, the printer does not check for inter-label gap
when printing. It is the responsibility of the host computer to avoid overrunning the label area.

Label-Movement Commands

There are three label-movement commands implemented in the LabelWriter: Form Feed, Short
Form Feed and Skip "n" Lines. These commands operate as follows.
Form Feed Command (<esc> E)
This command causes the control electronics to skip lines until the logical position counter has
decremented to zero, or the printer electronics sense the top-of-form hole or mark. The printer
then advances the label just beyond the tear-bar. This command can be used after every label or
combined with the Short Form Feed command (see below) to optimize printing by executing the
Form Feed command only at the end of a multi-label print job.
Short Form Feed Command (<esc> G)
Use this command when printing multiple labels. The normal Form Feed command also works
for this purpose. However, using the Short Form Feed command optimizes the printer and
minimizes print time by eliminating the need to reverse feed after advancing the top-of-form
mark to the tear bar, as the normal Form Feed command does. The Short Form Feed command
advances the printed label just far enough to place the next label in position for printing.
Because of the mechanics of the printer, the preceding label will still be partially within the
label exit slot. For a label to be in tear-off position, you must use the normal Form Feed
command (<esc> E).
Skip "n" Lines Command (<esc> f 1 n)
Use this command to force the LabelWriter printer to advance the number of lines
corresponding to the variable n (0 to 255 lines). This command is put into the data buffer along
with the print data so that it will take effect at the appropriate point in the data stream. The Skip
"n" Lines command is executed only one time per instance and must be re-issued each time a
skip is desired.

The Status Byte

The LabelWriter printer reports a status byte with several bits dedicated to reporting its current
state.
The host requests the status byte from the printer by issuing an ESC A command. The bits in the
returned status byte are described below:
Bit 0 (Ready Bit)
This bit is always returned as a 1.
LabelWriter 450 Series Technical Reference Manual Page 10