SPRT
２３
·
m =0 or 48, select the offset as calculation for ongoing paper direction.
·
The corresponding real distance of offset that set by nL
，
nH is (nL +nH
×
256)
×
0.176mm;
·
only after carried out these commands, then the related black mark
localization operation that commanded by GS FF and GS V is valid;
·
Set the offset of initial print position
（
a=1) valid while carrying out GS
FF command;
·
Set the offset of cutting/tearing paper position
（
a=2
）
valid while carrying
out GS V m command;
·
Default nL =nH =0, that is, when black mark test switch tested black
mark, current corresponding print head position on the receipt is the set
initial print position; and current corresponding cutting/tearing paper end
position on the receipt is the set cutting/tearing paper position.
·
Calculation explanation about the offset of cutting/tearing paper position
and initial print position:
1. When the distance L from cutting/tearing paper position to black mark
print position is same to the inherent mechanical value L0 of the printer’s
structure, furthermore, the distance Q from cutting/tearing paper position
to initial print position is same to the inherent mechanical value Q0 of the
printer’s structure (as Fig. 1 shows), all the offsets set by GS
（
F
command are 0.
2. When the distance L from black mark print position to cutting/tearing
paper position is smaller than the mechanical value of the printer L0 (as
Fig. 2 shows), the offset of cutting/tearing paper position commanded by
GS
（
F is calculated as: the offset of tearing paper position =(L0 -L)/0.
176 (dots number)
When the distance L from black mark print position to cutting/tearing
paper position is larger than the mechanical value of the printer L0 (as
Fig. 3 shows), the offset of cutting/tearing paper position commanded by
GS
（
F is calculated as: the offset of cutting/tearing paper position
=(L0+the distance between the two adjacent black marks-L)/0. 176 (dots
number)
Notice: When setting the offset of cutting/tearing paper position, the
parameter of GS ( F command a should be 2.
3
．
When the offset of cutting/tearing paper position is not 0 or the distance
Q from the initial print position to cutting/tearing paper position is larger
than the mechanical value of the printer
（
Q0
）
(as Fig. 4 shows) for each
