Printing apparatus and nozzle testing method
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United States of America Patent
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Dec 16, 2014
Issued Date -
N/A
app pub date -
Mar 6, 2014
filing date -
Mar 14, 2013
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A printing apparatus includes a head unit and a control section. The head unit includes nozzles, pressure chambers, and piezoelectric elements. The control section is configured to determine whether or not there is a liquid discharge failure in the nozzles corresponding to the piezoelectric elements based on a detection signal obtained by applying a testing waveform included in a driving signal to the piezoelectric elements. The control section is further configured to detect residual vibration using a first testing waveform in a first print mode performed at a first print speed, and to detect residual vibration using a second testing waveform in a second print mode performed at a second print speed with the first print speed being slower than the second print speed, a period of time for testing with the first testing waveform being longer than a period of time for testing with the second testing waveform.
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