Setup
Adjust Dispense Valve Snuff
Back
At the end of a shot, a small amount of material is drawn back into the static mixer to prevent extra material from being dispensed. If too much snuff back occurs, air will enter the static mixer and can travel up into the dispense valve. If too little snuff back occurs, the materials may drip out of the static mixer and affect dispense quantity.
It is most efficient to adjust the snuff back while material is dispensing, but it can also be adjusted when there is no air pressure in the system.
1.Navigate to the Shot Mode Screen or Operator Mode Screen.
2.Select a small size shot.
3.If a static mixer is not in place, install one, then prime the machine. See Prime the Dispense Head, page 28.
4.Place a waste container under static mixer.
5.Press the Dispense Request button ( 
).
6.Inspect the tip of the static mixer for dripping mate- rial or for air bubbles traveling up the mixer.
7.Perform another shot and, while dispensing, adjust the
•If an air bubble is moving up the mixer, turn the knob clockwise to decrease snuff back.
•If material is hanging from the tip of the mixer, turn the knob counterclockwise to increase snuff back.
8.Repeat step 7 until snuff back is adjusted as desired.
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