Star Micronics CBM-820 manual ESC K n, Directional paper feed is treated as follows

ESC K n

[Function]	Print and Reverse Paper Feed
[Code]	ASCII			ESC	K	n
	Hexadecimal			1B	4B	n
	Decimal			27	75	n
[Range]	0	n	255
[Outline]	This command prints the data in the print buffer and feeds the paper by n/60 inch in the reverse
	direction. Since the printer has the minimum paper feed pitch of 1/144 inch, n/60-inch reverse
	directional paper feed is treated as follows:

•For the standard mode: The paper is fed by an approximate value of INT((6n+5)+0.5)/72 inch.

[Caution]	•	The command is valid only in the standard mode.
	•	The head of the line is assumed to be the next printing start position.
	•	A set amount does not remain.

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