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Principles of Operation
Printing Mechanism
While the principles of line matrix printing are easy to state, the act of printing
dots accurately from a rapidly oscillating shuttle onto a vertically moving
piece of paper requires complex timing and coordination between printer
logic and the printing mechanism. The printing mechanism consists of the
shuttle frame assembly, the ribbon transport system, and the paper transport
system.
Shuttle Frame Assembly
The central element of the printing mechanism is the shuttle frame assembly,
which houses the hammer bank assembly and the shuttle drive motor. (See
Figure 11.)
Hammer Bank Assembly
Counterweight Assembly
Shuttle Frame
Assembly
Guide Shaft
Connecting Rod
Shuttle Drive Motor
Figure 11. Shuttle Frame Assembly
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