Epson LX-90 Manuel d'utilisateur télécharger pdf (Page 19)

Changing Pitches

In addition to pica, in which there are

characters per inch, the

LX-90 can also print in other widths, or pitches. It does so by reducing

the distance between pin firings. In the elite mode it prints 12 charac-

ters per inch and in the compressed mode it prints slightly more than

characters per inch. The pattern of the dots is not changed, but the

horizontal space between them is reduced.

Figure 3-2 shows enlargements of four sample letters in

each of

the

three pitches. These letters are chosen to show how the LX-90 prints

letters that are uppercase and lowercase, wide and

narrow,

and with

and without descenders (the bottom dots of the j and y).

This is pica.

This is elite.

This is compressed.

Figure 3-2. The three pitches

the LX-90

The dot pattern of each character is carefully designed so that in

pica no dot overlaps another. The reason is that in

normal

high-speed

printing the pins cannot fire and retract and fire again quickly enough

to print one dot overlapping another.

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Epson LX-90 Manuel d'utilisateur Page 19