Toshiba B-EP Series Interface Specification page 480

(6) When "3: Auto1" or "5: Auto2" is designated for the 2-inch print head, "Not divided,"
"Divided by 3" or "Divided by 2" is automatically selected for every line according to
the print ratio. The width of half a dot may not be printed on the line when
switching among "Not divided," "Divided by 2" and "Divided by 3." Therefore, do
not designate "3: Auto1" or "5: Auto2" when a serial barcode is printed.
The difference between Auto1 and Auto2 is while Auto1 is print quality oriented,
Auto2 is print speed oriented. Auto2 is designated to increase the print speed
although the print is slightly faded.
(7) When "0: Auto" is designated on the 4-inch print head, "Divided by 2", "Divided by
3" or "Divided by 6" is automatically selected for every line according to the print
ratio. The width of half a dot may not be printed on the line when switching
among "Divided by 2," "Divided by 3" and "Divided by 6."
designate "0: Auto" when a serial barcode is printed.
(8) When "3: Auto1" is designated on the 4-inch print head, "Not divided," "Divided by
2," "Divided by 3" or "Divided by 6" is automatically selected for every line
according to the print ratio. The width of half a dot may not be printed on the line
when switching among "Not divided," "Divided by 2," "Divided by 3" and "Divided by
6." Therefore, do not designate "3: Auto1" when a serial barcode is printed.
Notes (1) The set fine adjustment value for print density and the head output division
designation are backed up in memory (retained even if the power is turned off).
(2) The fine adjustment value changed by the Print Density Fine Adjust Command in
the RECEIPT mode, is also effective for the TPCL, LABEL and ESC/POS modes.
(3) When the head output division designation is omitted, the backed up value in
memory is used.
(4) When print density fine adjustment is selected in the SYSTEM mode (through key
operations on the printer), the fine adjustment value is a sum of the value in the
fine adjustment command and the system mode fine adjustment value. Note that
the maximum fine adjustment value is ±30.0 mm
Examples To set the density to - 2:
[ESC] AY; -02, 1 [LF] [NUL]
To set the density to + 3:
[ESC] AY; +03, 1 [LF] [NUL]
CHAPTER 7 RECEIPT MODE (INTERFACE COMMANDS)
7-11
B-EP Series
Therefore, do not