Effects of process parameters on cross-talk in triangular array multi-nozzle EHD printing head

In this paper, effect of cross-talk between the nozzles in triangular array multi-nozzle for electrohydrodynamic inkjet printing head is investigated on the basis of jetting angle i.e. deflection of meniscus at the boundary nozzles. By changing the process parameter i.e. flow rate of the liquid, applied voltage and space between the capillary nozzles; jetting angle at end capillaries are measured and analyzed. Experimental results show that, by keeping applied voltage constant and increasing the flow rate the jetting angle decreases. While keeping flow rate constant and increasing the applied voltage jetting angle increases. Moreover jetting angle increases with the decrease in space between the nozzles. To better evaluate this technique, electric field simulations are performed and compared with the experimental results. We observed a strong correlation between the simulated and experimental results.