Setup guide

B–2
Line Matrix Printing
Character Formation
The P4280 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 Column
Dot Row
Character Row
Character Column
Matrix visible only
to the printer
Ink dots formed
by hammer tips.
Figure B–1. Typical Character Formation