The heads used for UV inks are the models with built in heaters. You can run UV inks through unheated heads like you might see with the modified Chinese Epson UV desktop printers but they will be low viscosity UV inks at room temp. What is generally done is a UV ink with a viscosity of 100-200 cPs at room temp is heated inside the heads and the viscosity drop to ~10cPs. Xaar has some newer high viscosity heads that can use even higher viscosity inks ~1,000 cPs at room temp and ~100cPs at jetting temp (50-90C)
chacha wrote: ↑Fri Nov 03, 2023 10:02 am I also have the intention of making an ink circulation system, mainly to facilitate the heating of the ink material. At present, I am developing the nozzle of Xaar1002/1003 series, and I have completed most of the hardware design work, and I am still debugging the firmware code. Unfortunately, I do not have the waveform editing tool of this type of printhead, so I can only control the nozzle pressure by voltage.
Why did you develop this circulation system?