Printhead - Epson ActionPrinter 3000 LQ-200 Service Manual

Principles of Operation

Printhead

This section describes how the printhead operates.
Printing
This section describes how a dot wire prints. Figure 2-45 illustrates the printing
operation. When the printing process begins, the actuating plate is engaged to the
dot wire. When the dot wire's head driving coil is energized, the actuating plate is
attracted to the iron core. This drives the dot wire toward the platen. The dot
wire strikes the ribbon and the paper against the platen, printing a dot.
When the head driving coil de-energizes, the actuating plate spring returns the
plate its initial position. At, the same time, the impact of printing the dot and
to
the effect, of the wire resetting spring returns the dot wire to its initial position.
The dot wire remains engaged to the actuating plate until it is driven again.
Figure 2-45. Printing
LQ-200/AP3000 2-47