0.0.

0.

0

0

0 0 0.0.

-

--

 

 

 

-

Figure 9-l.

The letter “C” is created by printing 15 dots.

-

descenders

(such

as the lower case “p” shown) use the bottom

_ I

seven pins. As the printhead moves across the page (in either

 

direction-that’s

what is meant by bi-directional printing) it prints

-

 

 

 

one column of dots at a time. Each time a

dot

is supposed to

 

print an electromagnet inside the printhead causes

the appropriate

-

wire to strike the ribbon (making the SR- 1O/l

5 an impact printer).

 

-

0.0.

 

 

:

.

0.0.

0

 

:-

0: . 0.0.

:00 00

0.0.

oao :- 0

-_

--

-

Figure 9-2.As the printhead moves across the page, each of the wires prints one row of dots.

THE PRINT MATRIX

All of the standard characters that the SR-lo/15 prints are formed from patterns of dots that are permanently stored in the printer’s ROM (read-only Memory). This includes all of the standard ASCII characters, the block graphics and special characters, the international character sets, the NLQ characters and the italic characters.

-

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82

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Page 92
Image 92
Star Micronics SR-10/I5 user manual Oao, Print Matrix