Several parameters can be adjusted to alter the size of the dots produced. The parameter adjustments affect the dots in two ways: by changing properties of the fluid or by changing mechanical properties of the jet. The pressure on the fluid in the syringe was adjusted from 10 to 30 psi. This variation affected how much force pushed the fluid down and around the ball-needle tip when it was raised. The other parameter that affected fluid properties was the nozzle heater temperature setting.
Throughout this article, when reference to temperature is given, the temperature is of the heater setting and not the exact temperature of the fluid. The fluid temperature is always a few degrees less, due to thermal conduction losses in the system. The temperature settings were varied between 30