Значит так
"Команды управлени принтером"
action mode ascII decimal hexadecimal
"bidirectional printing" both <ESQ> "U" "0" 27 85 48 1B 55 30
Causes subsequent printing to be done in the normal bidirectional
mode, which is faster than unidirectional printing.
action mode ascII decimal hexadecimal
"unidirectional printing" both <ESQ> "U" "1" 27 85 49 1B 55 31
Causes subsequent printing to be done unidirectionally, ensuring
maximum vertical alignment precision.
