Apparatus and method of controlling a printhead of a...

Details Apparatus and method of controlling a printhead of a... Apparatus and method of controlling a printhead of a...

2007-01-30

2007-01-30

Huffman, Julian D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S019000

Reexamination Certificate

active

10645227

ABSTRACT:
In an ink-jet printer in which a carrier is servo-controlled using an encoder, speed information at the start of movement is estimated to perform stable servo control without any influence of an incorrect speed owing to vibrations or the like at the start of movement. For this purpose, in servo-controlling the carrier by using a DC motor on the basis of position information obtained from the encoder, not a detected speed obtained from the encoder, but an ideal speed or an estimated speed calculated by multiplying an ideal speed by a predetermined ratio is used as speed information for servo control of the carrier until the carrier moves in an arbitrary speed estimation region after the start of movement.

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patent: 2003/0043228 (2003-03-01), Igarashi

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