Self-adjusting controller for dot impact printer

Details Self-adjusting controller for dot impact printer Self-adjusting controller for dot impact printer

1993-12-13

1995-08-08

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

40012405, 400279, 4001573, B41J 225

Patent

active

054393027

ABSTRACT:
A controller for a dot impact printer has capacitance sensors for sensing the motion of the dot wires in the print head, and a non-volatile, rewritable memory for storing self-adjustment data relating to dot-wire characteristics. A processor controls the driving of the dot wires according to the self-adjustment data stored in the memory. At certain times, the processor causes the dot wires to be driven in a test sequence and updates the self-adjustment data in the memory according to the resulting sensor output. Print quality is thereby maintained for the full guaranteed life of the print head.

REFERENCES:
patent: 5039237 (1991-08-01), Tanuma et al.
patent: 5078517 (1992-01-01), Hiroshi et al.

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