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Character print
One character is composed of the 7
X
5
matrix dots. Assume letter "H" is to be printed. When Carriage
Return and data "H" signals reach the printer, the line feed motor runs and the thermal head is caused
to move in the direction indicated in the figure on the left.
When the thermal head moves and the row of dots reaches position A, alt dots (1
-
7) are heated and
(
the color. of the paper is changed. When the thermal head advances to position B, only dot (4) is
heated. Identically, as the thermal head advances and the row of dots reaches positions C, D, and E,
dots (41, (4) and (1
-
7 ) are heated, and pattern "H" is printed on the printing paper.
Direction of movement of the thermal head
:
>
A
=
E/print
1
u a a m
2
I
U
D
O
I
3
1
n
n
a
1
4
1
1
1
1
1
5
1
n
n
n
m
6
i
n
n
a
I
7
1
n
o
u
1
Figure 5.
The relationship between thermal head feed and dot printing positions is as shown below. (Since con-
trol signals are controlled by the pCPU, it is not possible to make adjustment.)
1 Character
Carriage Return
Motor
Thermal Head
Figure 6.
8
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