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1:1 Aspect
Ratio:
When this aspect ratio is
selected,
the
printer
assumes a horizontal and vertical dot density of 120 dpi. The bit-
to-electrode assignment is given in the following table. At this
aspect
ratio,
a data byte would use only 16 of the 40 available
ver-
tical printing electrodes. To improve performance and reduce
ribbon
usage,
two consecutive ESC L (Dual Density Bit
Image)
commands will be
combined,
when possible, by the
printer
into
one print
operation.
To guarantee scan accumulation
,
the fol-
lowing conditions must be
satisfied:
•
Line spacing set to 16/240 inch.
•
Consecutive graphics ESC L commands must be separated
by
one CR and one LF
command.
•
Each ESC
L
command must begin
at
the left margin.
•
The number of bit image data bytes represented by each
ESC
L command must be the
same.
•
The print line length represented
by
the
bit
image data bytes
must not exceed the right margin or 13.2 inches.
•
Each
ESC
L command must not be separated by more
than
one
second.
Data Byte
Number of
Print Electrode
Bit Number
Electrodes
Position
Command
7
Top
2
1 - 2 Top
One
6
2
3
-
4
5
2
5
-
6
4
2
7-8
3
2
9 - 10
2
2
11
-
12
1
2
13
- 14
0 Bottom
2
15
-
16 Bottom
7
Top
2
17 - 18
Top
Two
6
2
19 - 20
5
2
21 - 22
4
2
23 - 24
3
2
25 - 26
2
2
27
- 28
1
2
29
-
30
0
Bottom
2
31
-
32 Bottom
4-36
,.......,
,..._
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