| 摘要 |
<p>A print head (10) and method that are capable of detecting a plurality of performance conditions such as a dry-fire, no-fire or clogged-nozzle condition. Pressure wave sensors (40,50) within a print head are disclosed that are capable of detecting pressure waves (26) generated by the firing of an ink expulsion mechanism (14). The characteristics of the pressure wave generated by the firing event (e.g., magnitude and timing) are indicative of operating conditions within the head (10). Multiple sensor types are disclosed. <IMAGE></p> |
