Compuprint MDP40B Programmer Manual - Manual (Page 18)

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Send this command before paper is loaded or when paper is at the top-of-form position.
Otherwise the current print position becomes the top-margin position. Measure both
top and bottom margins from the top edge of the page. The baseline for printing
characters on the first line is 20/180 inch below the top-margin position.
This command cancels any previous top and bottom-margin settings.
ESC ( U
Sets units. (EPSON ESC/P2)
ASCII Code ESC ( U n
1
n
2
d
Hexadecimal Value 1B 28 55 n
1
n
2
d
Decimal Value 27 40 85 n
1
n
2
d
Range n
1
= 1
n
2
= 0
d = 10, 20, 30, 40, 50,60
This command sets the unit to m/3600 inch. The printer uses this unit when moving
the print position, setting the page length and setting the top and bottom margins
with the following commands (the default units varies depending on the command and
print quality):
Commands Default Unit
ESC ( V 1/360 inch
ESC ( v 1/360 inch
ESC ( C 1/360 inch
ESC ( c 1/360 inch
ESC \ (LQ mode) 1/180 inch
ESC \ (Draft mode) 1/120 inch
ESC $ 1/60 inch