First, the printhead lifespan will be shortened. In high-drop printing mode, in addition to the control of the high-drop board, the printhead voltage is correspondingly increased to enhance the jetting force. When operating under high voltage for extended periods, the printhead's lifespan will be correspondingly shortened.
Second, the printing speed is slow, resulting in low productivity. Currently, most equipment only supports unidirectional printing when performing high-drop printing — bidirectional printing is not achievable.
Third, print precision is relatively low. Because the distance between the product and the printhead is increased during high-drop printing, the ink droplets being ejected tend to scatter, making the printed pattern prone to ink misting and resulting in unclear edges.
Fourth, UV lamp reflection can damage the printhead. When the printhead carriage is raised for high-drop printing, the reflective surface during UV lamp curing is more likely to shine directly onto the printhead, leading to printhead clogging.
Fifth, high-drop printing has extremely high requirements for both ink and equipment. Standard inks typically lack sufficient surface tension and are not suitable for high-drop printing. On the equipment side, high-drop printing requires a dedicated high-drop control board, specialized curves, waveforms, and other matching components to achieve good print results.