Tips | How does digital sublimation ink affect the print head waveform?
1. The influence of ink sound speed on waveform
Generally, the sound speed of the ink with a larger proportion is faster, and the sound speed of the water-based ink is greater than that of the oil-based ink. For the same print head, when using different densities of ink, the optimum wavelength in its waveform should be adjusted. For example, the wavelength width of driving water-based ink should be smaller than that of oil-based ink.
2. Influence of ink viscosity on waveform
When the digital printing machine prints in multi-point mode, after the first driving waveform ends, it needs to pause for a while and then send the second waveform, and when the second waveform starts is the natural pressure on the nozzle surface after the first waveform ends. When the oscillatory change just decays to zero. Different ink viscosity will affect this decay time, so it is also an important guarantee for stable ink viscosity to ensure stable printing, and it is better to connect when the phase is zero, otherwise the wavelength of the second wave must be changed to ensure that Normal inkjet, which also increases the difficulty of adjusting the best inkjet waveform.
3. Influence of ink density value on waveform
When the ink density value is different, its sound speed is also different. Under the condition that the size of the piezoelectric sheet of the nozzle has been determined, usually only the pulse width length of the driving waveform can be changed to obtain the best pulse peak point.
In general, the relationship between the nozzle waveform and the ink is that the waveforms corresponding to different inks are also different, which is mainly affected by the sound speed of the ink, the viscosity of the ink, and the density of the ink.