Owner's manual

3 Operation
The DJ-100 is driven by two two specially positioned piezoelectric actuators. The actuators move a rod,
which is lifted or lowered. A sealing ball from resistive ceramics is fixed to the lower end of this rod. The
tight fit from ceramic plate is closed by means of the sealing ball. When the sealing ball is lifted, the fluid
can flow from the valve. Due to the extremely fast piezoelectric drive it is possible to achieve a dispensing
frequency of up to 1000 Hz. However, a maximum frequency of 150Hz is recommended to increase the
life time of the nozzle plate and the sealing ball. By means of the jet on time of approx. 250 µs (maximum
stroke for DJ-100) it is possible to dispense a minimum volume of approx. 2nl (subject to the fluid). The jet
on-time can be increased in increments of 10 µs (e.g.> 0.25µs ¬ 0.26µs) to create a very exact attitude of
the dispensing quantity.
Adjustable Features
The following features affect performance of the DJ-100 and are typically adjusted to fit your application.
Fluid Pressure
Fluid Pressure should be set so that fluid fills to the seat but does not push the fluid through the seat and
nozzle. In general, higher fluid pressure results in a larger volume of material jetted.
Piezo Electric Actuator
The Piezo Electric Actuator controls the valve operation. The jet ON/OFF times can be adjusted in the
Fluidmove software.
Fluid Heater
Fluid temperature often influences fluid viscosity and flow characteristics. The DJ-100 is equipped with a
heater system that assures a constant fluid temperature.
Dot and Line Parameters
In addition to the DJ-100 hardware configuration and settings, Dot and Line Parameters are set in the
Fluidmove software program to control the size and quality of dots and lines dispensed. For information on
dispense parameters, refer to the Fluidmove User Guide or Online Help.
3