Star Micronics DOT MATRIX PRINTER SP2000 - Manual (Page 29)

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NOTE For double density bit image printing, dots cannot be printed
overlapping each other in the horizontal direction.
The following is an example of this.
m2 m4 m6
m1 m3 m5 m7
m8
m9
m10
m11
D8
D7
D6
D5
D4
D3
D2
D1
m2 m4 m6
m1 m3 m5 m7
m8
m9
m10
m11
D8
D7
D6
D5
D4
D3
D2
D1
Printing possible Printing not possible
Overlapping
horizontally
Overlapping
horizontally
When printing one graphic image of a minimum of two lines with
<ESC> K or <ESC>L, feed the paper a minimum of one line
before printing so that the line spacing becomes identical
between the lines.