Helpful Hints
• There are three core variables for setting up the Ultimus high precision fluid dispenser: dispense time, pressure,
and vacuum. Adjust just one of these at a time, in small increments, to achieve the correct deposit.
• Another important variable is tip size. Choose the right tip for the deposit type. Remember, smaller tips require
more pressure and more time. Try different tips without changing the time or pressure settings and observe the
results.
• Tapered tips reduce the amount of air pressure needed to dispense thick materials. They also help prevent
drooling at the end of a dispense cycle.
• To ensure smooth fluid flow and to make consistent deposits, keep the dispense tip at a 45° angle to the work
surface.
• Use EFD SmoothFlow pistons to make barrel loading, dispensing, and fluid handling cleaner, safer, and more
accurate.
If you dispense watery fluids and choose not to use EFD pistons, do not increase vacuum pressure rapidly and do
not tip the barrel. Vacuum may pull fluid into the adapter hose, or, if the syringe barrel is tipped, fluid may flow back
into the dispenser.
CAUTION
• Always use new EFD syringe barrels and tips. Carefully dispose of after use. This procedure ensures maximum
cleanliness, prevents contamination, and provides proper safety.
• Do not completely fill the syringe barrel. For most fluids, optimum fill is a maximum 2/3 of the barrel capacity. For
cyanoacrylates or watery fluids, optimum fill is 1/2 of the barrel capacity.
Suggestions on Settings
• Avoid high pressure settings with very short time settings (example: 5.5 bar / 80 psi at less than
000.0100 seconds). The ideal setup matches air pressure and tip size to produce a “workable” flow rate – no
splashing, but not too slow either – with a time setting that is not extremely low.
• With any fluid, always give the air pressure time to do its job. Moderate time and pressure provides the best
results since dispensing pressure remains at its peak for a longer period of time.
• Longer dispense time settings generally provide the highest accuracy. However, in the interest of cost-effective
production, do not use excessively long dispense time settings. Experiment to find what works best for your
application.
Initial Test Procedures (continued)
Ultimus I–II High Precision Fluid Dispensers
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800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
