18
Operation
4 Operation
Overview
This section covers the following topics:
•
Theory of Operation
•
Installing/Changing a Fluid Syringe
•
Pump Adjustments
•
Priming the Pump
•
Assembling a Dispensing Cartridge
•
Valve Offsets
•
Loading a Dispensing Cartridge
•
DV-7000 Optional Configuration
Theory of Operation
The DV-7000 and DV-8000 pumps use the following mode of operation:
1. Air pressure, which can be configured to remain constant or to toggle ON and OFF with the
pump motor, causes fluid in a syringe to flow into contact with the pump feedscrew. The
feedscrew is held in a cartridge.
2. The pump motor turns the feedscrew and shears the fluid.
3. The shear force drives fluid down the threads of the feedscrew and through the dispensing
needle at the end of the cartridge.
4. Fluid is dispensed onto the workpiece.
The fluid viscosity (resistance to flow), size of the needle opening, geometry of the feedscrew, and the motor
speed determine the quantity of fluid dispensed.
Pump Adjustments
You can optimize the performance of the pump by changing various settings, such as motor speed and air
pressure. Software parameters can also be changed to meet your particular application requirements.
CAUTION!
Only trained service technicians should perform pump settings adjustments.
Motor Speed
Pump motor speed is a crucial factor in the dispensing process. Applications Engineers must consider
dispensing system model, fluid properties, needle size, and substrate when determining the optimum pump
speed for your application.
On systems with front control panels (M-600 Series, Century Series), or systems running FMW, manual
speed controls control the speed of the pump motor. Refer to the manual for your particular dispensing
system
for help locating the speed controls.
On M-2000, X-1000, Spectrum, and DispenseMate Series systems and/or systems running FmNT/FmXP,
speed control is integrated in the software. To locate the speed controls in Fluidmove, click on
Configuration > Setup Valves
in the Main Window. Click on
Edit
in the Setup Valves dialog box and select
the
Settings
tab
.
Refer to the
Fluidmove
User Guide
or Online Help for more information.
