Systems and methods for determining printhead in a print...

Details Systems and methods for determining printhead in a print... Systems and methods for determining printhead in a print...

2006-06-20

2006-06-20

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S008000, C347S198000

Reexamination Certificate

active

07063401

ABSTRACT:
A system and method for sensing the positioning the printhead in one or more of a standby position, a wipe position, and a printing position uses electrical signals from a drive motor as an indicator of whether the printhead has properly moved to a desired position. As the printhead is tilted to a print position, a first position electrical signal is detected by sampling a resistance on the torque motor at a first time. A second position electrical signal is determined by sampling another resistance on the motor at a second time. A slope is calculated between the first position sample and the second position sample. The calculated slope is analyzed to determine whether the printhead is operating properly. Thus, the need for standalone sensors to determine the positioning of the printhead is eliminated.

REFERENCES:
patent: 5806996 (1998-09-01), Leys et al.
patent: 5820275 (1998-10-01), Crawford et al.
patent: 6015205 (2000-01-01), Chambers et al.

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