Jetting Device with Reduced Crosstalk

A method of assembling a printing device, comprising:

• selecting a voltage pulse to apply from a driver to a piezoelectric actuator in the printing device;
• determining a break off time for the liquid exiting the nozzle resulting from the voltage pulse;
• selecting a liquid for ejection from the printing device;
• calculating a speed of sound in the liquid times the break off time of a droplet of the liquid;
• connecting a flow path body to a feed substrate, the flow path body comprising a first jetting flow path and an adjacent second jetting flow path, each jetting flow path having a nozzle fluidically connected to a pumping chamber actuated by a piezoelectric actuator, the feed substrate having a first fluid inlet connected to the first flow path and a second fluid fluid inlet connected to the second flow path;
• and
• selecting a thickness of the feed substrate such that a fluidic travel distance from the piezoelectric actuator of the first jetting flow path to the nozzle of the second jetting flow path is greater than a speed of sound in the fluid times the break off time of a droplet of the fluid from the nozzle.

A method of assembling a printing device, comprising:

• forming a plurality of jetting flow paths in a flow path body, wherein the plurality of jetting flow paths includes a first jetting flow path and a second jetting flow path, the first jetting flow path being adjacent to the second jetting flow path, each jetting flow path has a nozzle fluidically connected to a pumping chamber and the pumping chamber is fluidically connected to a fluid flow channel;
• forming a piezoelectric actuator adjacent each pumping chamber;
• forming a plurality of fluid inlets in a feed substrate, the plurality of fluid inlets including a first fluid inlet and a second fluid inlet;
• securing the feed substrate to the flow path body such that the first fluid inlet is connected to the first flow path and the second fluid inlet is connected to the second flow path;
• and
• connecting a driver configured to apply a voltage pulse to the piezoelectric actuators, the voltage pulse resulting in a break off time for a liquid exiting the nozzle,
• wherein a fluidic travel distance from the piezoelectric actuator of the first jetting flow path to the nozzle of the second jetting flow path is greater than a speed of sound in the liquid times the break off time of a droplet of the fluid from the nozzle.