Fast and accurate

In tabbing and stringing processes in many industries, such as electronics, automotive and solar production the narrow solder-coated copper ribbon used to link individual cells requires precise flux application to ensure a good connection and prevent discoloration. Piezoelectric dispensing systems enable flux to be applied at high speed with accuracy, but without mess or safety issues. Nordson EFD's PICO piezoelectric jet dispensing systems have two piezoelectric actuators composed of stacked ceramic coins that expand and contract in response to changes in voltage supplied from the valve driver.When voltage is applied to the actuators, the rod and sealing ball are raised so pressurised fluid can flow to the nozzle.When the voltage is changed, the rod and sealing ball descend rapidly to jet the fluid out of the nozzle onto the substrate. Fluid can be dispensed continuously at speeds to 150 cycles/s. Depending on fluid, the system can produce consistent shots as small as 2nL. The high resolution (0.01ms) of the valve controller makes it possible to adjust the size of the deposit with precision.