New actuation waveform design of DoD inkjet printer for single and multi-drop ejection method

Abstract

The development of a variety of inkjet technologies to improve the print quality has been attempted over the past few decades. In recent years, binary technology has mostly been used instead of grey-scale technology. The development of a multi-drop ejection method for use in a grey-scale technique with a clear spherical droplet, and without a satellite or ligament occurring, has become a significant challenge in inkjet printer technology. In this study, we create a new actuation waveform for both single and multi-drop ejection methods. The design process uses a conceptual model based on the wave superposition principle. A good performance in terms of the droplet shape without the occurrence of a satellite, a ligament, or weeping has been achieved for up to five main pulses, thereby generating five different droplet sizes from the same nozzle. This is a radical improvement, particularly for a multi-drop ejection method, thereby enhancing the print quality.