User Guide

Pause
The Pause function “pauses” the action of the plunger during a dispense cycle, acts as a settling
period and allows the relief of back pressure between Forward and Pullback steps. Pause is helpful
when you are dispensing a large amount of material with a very small tip. In most cases you will not
need to use the Pause function.
In PROGRAMMED DISPENSE mode, press the Pause button to insert an end-of-cycle pause. Use
the (+) or (-) buttons to set the Pause time.
In MANUAL mode, the Pause button is not active.
• Pause is measured in milliseconds. The maximum Pause is 60,000 ms (one minute).
• The default setting for Pause is 0 ms.
Pullback/Back
Pullback sets the number of steps that the plunger will retract into the cable assembly, in
preparation for the next dispense cycle. Be conservative when setting the Pullback. With thick fluids,
too much Pullback can disengage the plunger from the piston. With thin fluids, excess Pullback can
introduce air into the syringe barrel.
In PROGRAMMED DISPENSE mode, press the Back button to activate the Pullback screen. Use
the (+) or (-) buttons to change the number of Pullback steps as needed.
• Use Pullback to eliminate dripping and oozing. We recommend a minimum Pullback of 200
steps for low viscosity fluids.
• For thicker fluids, set the Pullback to 300 steps or more.
• In general, adjust Pullback in small increments of 50 steps at a time for best results. Press the
foot pedal to dispense, and visually check the deposit. Adjust Pullback again if necessary.
When setup is correct, there should be no oozing or dripping.
• The maximum number of Pullback steps is 20,000.
• The default setting for Pullback is 200 steps.
In MANUAL mode, press and hold the Back button to manually retract the plunger as needed.
Features &
Controls
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