Nordson Ultimus II - Initial Test Procedures (continued); Helpful Hints for Setup; Suggestions on Settings

Helpful Hints
• There are three core variables for setting up the Ultimus high precision uid 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 uid ow 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 uid handling cleaner, safer, and more
accurate.
If you dispense watery uids and choose not to use EFD pistons, do not increase vacuum pressure rapidly and do
not tip the barrel. Vacuum may pull uid into the adapter hose, or, if the syringe barrel is tipped, uid may ow 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 ll the syringe barrel. For most uids, optimum ll is a maximum 2/3 of the barrel capacity. For
cyanoacrylates or watery uids, optimum ll 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” ow rate – no
splashing, but not too slow either – with a time setting that is not extremely low.
• With any uid, 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 nd what works best for your
application.
Initial Test Procedures (continued)
Ultimus I–II High Precision Fluid Dispensers
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