Over actuation detection in a micro electromechanical device

Details Over actuation detection in a micro electromechanical device Over actuation detection in a micro electromechanical device

2005-07-26

2005-07-26

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S054000

Reexamination Certificate

active

06921145

ABSTRACT:
A method of detecting an over actuation condition within a micro electromechanical device in the form of an ink ejection nozzle having an actuating arm that moves an ink displacing paddle when heat inducing electric current is passed through the actuating arm and having a movement sensor associated with the actuating arm. The method comprises the steps of passing at least one current pulse having a predetermined duration through the actuating arm and detecting for a rate of movement of the actuating arm. A fault condition is detected to exist where the detected rate of movement is in excess of the rate for normal operation.

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Design, Fabrication, and Teting of a C-Shape Actuator, G Lin, CJ Kim, S Konishi, H Fujita; IfM, Louisiana Tech Univ., PO Box 10348, Rustom, LA 71272, USA; Mane Dept, UCLA, Los Angeles, CA 90095, USA; IIS, Univ of Tokyo, Roppongi, Minato-ku, Tokyo 106 Japan.

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