| 摘要 |
A thermal monitoring system determines whether a fluid ejecting nozzle is healthy and operating in a thermal fluid ejection system to eject precise amounts of fluid in response to a firing signal. If not, a nozzle recovery routine is preformed to remove any nozzle blockages, with different routines being preformed to address the type of blockage encountered. If recovery is not possible, or if the nozzle failure is detected "on-the-fly" during a normal fluid application routine, a substitute healthy nozzle is engaged without interrupting the job. Nozzle health is determined by monitoring the temperature change of the nozzle following application of the firing signal. In one embodiment, an inkjet printing mechanism uses a thermal inkjet printhead to eject an inkjet ink as the fluid. A method of monitoring the health of a fluid ejection nozzle is also provided.
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