Ransburg Evolver NE A11279-XX, A11281-XX, A11775-XX, A11776-XX - Manual (Page 22)

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Evolver NE Solventborne Robotic Atomizers - Operation
OPERATION
SPRAY APPLICATOR CONTROLS
Atomization (A) / Fan Air (F)
The atomization and fan air are turned on by the
trigger line and are controlled by an internal air valve
located in the applicator head. During normal opera-
tion with applicator triggered off, there is a slight
bleed of air through the atomization part.
Atomizing Air
Adjustments are made through the robot PLC or a
manually adjustable air regulator. The lowest air
pressure required to break up the paint should be
used. Lower atomizing air pressures result in less
overspray and increased transfer efficiency.
Fan Air
Adjusting the fan air increases or decreases the size
of the spray pattern. Increasing pressure increases
pattern size. Pattern adjustment should be made to
suit the size and shape of the object being painted.
This adjustment is made through the robot PLC or a
manually adjustable air regulator.
Air cap pressures should be set using air cap test
kit. This provides a consistent measurement, so
initial settings may be duplicated at any time. (See
"Parts Identification" section for "Air Cap Test Kit Part
Numbers".)
> Most paints and solvents are toxic to a certain
degree and flammable or combustible. Use them
only in a well ventilated atmosphere. Use protec-
tive equipment as required in the Material Safety
Data Sheet supplied with the substance.
W A R N I N G
!
> Insure that the fan and atomization air
are on and flowing prior to triggering the
fluid. Failure to follow this sequence will
cause spits and defects on the part being
painted.
NOTE
FLUID VALVE CONTROLS
Trigger, Dump, and Solvent
(See Figure 4)
The fluid dump valve in the Evolver NE is actuated
by an air signal. The air pressure must exceed 70 psi
(4.83 Bar) to assure proper actuation of the valve.
Applying air to the valve actuator turns on the fluid
flow for that valve.
The dump valve controls the paint flow through the
dump line. When actuated, paint flow is direct to the
dump return line. This provides a method of rapidly
removing paint from the incoming line for cleaning
and/or color change. Normally, the dump valve is not
actuated at the same time as the paint trigger since
the trigger is intended to cause the fluid to flow out
the applicator at the prescribed input pressure.
DUAL PURGE SPRAYING
Paint Viscosity
The applicator is capable of atomizing paint of most
any desired viscosity. It is recommended to keep
the material viscosity as low as possible. This allows
spraying at lower fan and atomization air pressures
which results in less overspray and higher transfer
efficiency.
AA-05-01.5