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Character Formation
The P9212 is an impact printer: It creates characters by printing ink dots on
paper. Dots overlap to produce a solid-appearing character of uniform
density. The dots are made by an assembly of steel hammers mounted on a
rapidly oscillating shuttle. The hammers strike the paper through a moving
ink ribbon. The dot patterns of characters are mapped in printer memory on
invisible matrixes, as shown in Figure B–1.
Dot Row
Ink dots formed
by hammer tips.
B–2
Dot Column
Matrix visible only
to the printer
Character Column
Figure B–1. Typical Character Formation
Character Row
Line Matrix Printing
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