The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Jun. 24, 2004
Marcia D. Haney, Oregon City, OR (US);
David W. Hanks, Forest Grove, OR (US);
Michael W. Whalen, Tigard, OR (US);
Mark H. Cowan, Sherwood, OR (US);
Marcia D. Haney, Oregon City, OR (US);
David W. Hanks, Forest Grove, OR (US);
Michael W. Whalen, Tigard, OR (US);
Mark H. Cowan, Sherwood, OR (US);
Xerox Corporation, Stamford, CT (US);
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.