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ESC
K
Normal Density Bit Image
ESC K
Ln Hn n1 n2
...
nk
4.34
This command changes the printer from text
to bit
image printing
with a horizontal dot
density
of 60 dots per inch
(dpi).
Each
data
byte
(nk)
represents one column of 8
dots.
The vertical dot
density is determined by the active horizontal-to-vertical aspect
ratio.
The
aspect ratio is selected
by
the ESC n
(Select
Aspect
Ratio} command.
The default
aspect ratio is 5:6. The number of
bit image data bytes printed is equal to 256 times
Hn
plus
Ln.
All
text printing modes are suspended by the bit image printing
mode.
Bit image
commands
and text may be mixed on the same
line.
The printer ignores any bit image data which would print
beyond the
right
margin
or more
than
792 bytes for a line
length
of 13.2
inches.
5:6
Aspect
Ratio:
When this aspect
ratio
is active, the printer
assumes a horizontal dot density of 60 dpi and a
vertical
dot
density of 72 dpi
.
Since the printhead used by the printer
is
1/6
inch high and has 40
electrodes,
the
printers
vertical dot density
is 240 dpi.
To
simulate a
vertical
dot density of 72 dpi requires
the
printer to assign 3 and 4 vertical
printer
electrodes to each
data bit
(vertical
dot) as defined in the following
table.
Data Byte
Number of
Print Electrode
Bit Number
Electrodes
Position
1 - 6
Top
7
Top
3
7-9
6
5
4
3
2
1
0
4
10
- 13
3
14 - 16
3
17 - 19
4
20 - 23
3
24 - 26
3
27 - 29
Bottom
4
30 - 33
34 - 40 Bottom
1
:1
Aspect Ratio:
When this aspect ratio is
active, the
printer
assumes a horizontal and vertical dot density of 60 dpi.
The
bit-
to-electrode
assignment is given in the following
table.
,....
...
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