Abstract
The multi-drop method with a good droplet quality is a big challenge in inkjet technology. In this study, optimization of Drop on Demand (DoD) inkjet printer waveform design was conducted. The effectiveness of the waveform design, so-called W waveform, from previous study as a preliminary vibration for the multi-drop ejection method was investigated. The unmodified W waveform was proven not to be an effective waveform for lower viscosity of liquid, especially when compared by the standard waveform obtained from a print-head manufacturer. Edible ink with a viscosity below the optimum range for print-head specifications was employed as the operating liquid. The preliminary vibration W waveform was modified to improve the droplet quality of the edible ink. It was proven that a 40% adjusted voltage of the rear wave of the W waveform was effective as the optimum waveform design for edible ink. The droplet quality of the multi-drop ejection method for grey-scale technology was improved by optimizing the W waveform design.
Highlights
There are three fundamental components of an inkjet printer, namely the printhead, actuation waveform, and inks
Edible printing refers to the process of printing onto various food products using edible ink [2]
Edible ink is a liquid with edible food colours used for creating pre-printed images on various confectionery products, such as cakes or cookies
Summary
There are three fundamental components of an inkjet printer, namely the printhead, actuation waveform, and inks. A current requirement in inkjet printing technology is the establishment of printheads that have higher flexibility with fluid properties. Using the same printhead for different liquid properties becomes a significant challenge for printer manufacturers [1]. It would be very beneficial for the printer company to use a few types of printheads for various types of ink or operating liquid. The flexibility of the printer capability is necessary for the printer manufacturer They have had difficulty controlling the printing result for liquids with low viscosity, such as edible ink. Edible ink is a liquid with edible food colours used for creating pre-printed images on various confectionery products, such as cakes or cookies. The edible paper is made from starches and sugars, onto which edible food colours are printed
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