User Guide

Helpful Hints
• Faster dispense rates require more Pullback steps. That’s because you are putting more
pressure on the fluid, creating compression inside the syringe. For best results, use the preset
default dispense rate of Medium.
• If you are making small deposits, you are likely creating a lot of pressure trying to force the fluid
through a small dispense tip. Begin with the largest tip practical to your application, with a slow
dispense rate. Depending on how thick your fluid is, you may also need to increase Pullback to
relieve back pressure in the syringe barrel.
• Changing the dispense rate changes the deposit size. The Ultra 2800 provides a metered
deposit based on Forward steps at a specific dispense rate. When you change the dispense
rate, the deposit size also changes, even though the number of Forward steps remains the
same. For example, 25 Forward steps at the high dispense rate produces a smaller deposit than
25 Forward steps at the low rate. That’s because the slower rate gives the fluid more time to
dispense, while the faster rate compresses the fluid and restricts the flow path. For optimum
consistency, stay at the same dispense rate once you have stabilized your deposit settings.
Setting up the First Shot
• Go through the steps outlined in the Ultra 2800 Quick Start Guide to establish your initial
deposit. Work first with the EFD test material, included with your dispensing kit.
• Check the Ultra 2800 Settings Grid for recommended settings, including Forward steps, Pause,
Dispense Rate and Pullback. The grid is included in your dispensing kit.
• Keep your Pullback setting low to reduce the risk of introducing air into your syringe barrel.
• Experiment with different values for each variable. Change only one value at a time and allow
the deposit to stabilize before adjusting or changing another value.
Components
• Always use new EFD barrels and tips. Carefully dispose of after use. This procedure ensures
maximum cleanliness, prevents contamination and provides proper safety.
• You must use a piston with the Ultra 2800. Besides being required to connect with the plunger,
the piston makes barrel loading, dispensing and fluid handling cleaner, safer and more accurate.
• Use the largest tip size possible. Smaller tips require more pressure, which can compress the
fluid and cause oozing, and more time. For best results when working with thick fluids, use EFD
tapered tips. Tapered tips are specially designed to reduce the amount of pressure needed and
are available in a range of sizes. They also help prevent drooling and oozing.
Cycle Start & Abort
The Cycle Start button serves the same purpose as the foot pedal. Pressing either of these once will
return you to Home. However, pressing the Cycle Start button twice can abort your program. Therefore
we recommend that you use the foot pedal to dispense from Programmed mode. A dispense cycle
can be stopped at any time by pressing the Cycle Start button.
Operating
Tips
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