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Proceedings Paper

Improving the performance of a shear-type piezo printhead
Author(s): Alfred Zollner; Peter Moestl
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Paper Abstract

For portable printers low energy consumption of the printhead is important. Because of their high efficiency shear-type piezo printheads are the best choice. However, when scaling down the dimensions the effects of crosstalk between two adjacent channels become increasingly visible. In order to study the interaction of different channels a simple linear model was developed. The model includes the mechanical characteristics of the actuators and some general coupling elements between the actuators. Due to the simplicity of the model a 360 dots per inch printhead with 64 nozzles could be simulated as a whole. A set of parameters was determined from crosstalk measurements so that the output values of the model fitted the measured values. The results are in good agreement with the measurements. The model was helpful in finding a means to compensate pattern-dependent velocity deviations by adjusting the control pulse, allowing the complete elimination of crosstalk effects. With a second pulse parameter the refill time of a channel was minimized for all patterns. Hence the firing frequency of the printhead was increased to 8 kHz. The velocity deviations due to crosstalk are less than 5%.

Paper Details

Date Published: 7 February 1997
PDF: 8 pages
Proc. SPIE 2949, Imaging Sciences and Display Technologies, (7 February 1997); doi: 10.1117/12.266340
Show Author Affiliations
Alfred Zollner, Technical Univ. of Munich (Germany)
Peter Moestl, Technical Univ. of Munich (Germany)


Published in SPIE Proceedings Vol. 2949:
Imaging Sciences and Display Technologies

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