Waveform Optimization for Improving Inkjet Printing Speed

Abstract

Abstract Inkjet has been widely used in different industrial applications for its high resolution and capability to print with multiple materials, but its printing speed has limited its use for high volume production. This paper presents a new approach to improve the speed of piezo inkjet printing through waveform optimization. We previously developed a model that can predict the effects of driving signal parameters on printing speed, and in this paper, we use optimization techniques to find the optimal signal parameters for maximum speed. We then validate these optimal parameters using a custom-designed experimental setup with a high-speed camera capable of capturing the dynamics of droplet formation. Our results show that our optimized signal achieves successful jetting with a five-time increase in equivalent printing speed compared to a benchmark commercial printhead (Xaar 128/80W).