SATO D508 Operator's Manual page 55

6.2 CHECKING USING THE PARALLEL INTERFACE (CONT'D)
If you are using BASIC, it may be adding these characters
automatically as the line wraps. Adding a "width" statement
to your program can help to suppress these extra 0D 0A
characters by expanding the line length up to 255 charac-
ters.
If you are not programming in BASIC, check to see if you
have an equivalent statement in the language you're using,
to suppress extra carriage returns and line feeds from your
data being sent out to the printer. The data stream should be
one complete line going to the printer.
SATO D508/D512 Operator Manual
SECTION 6: TROUBLESHOOTING
Obserations
Page 6-3