Ransburg Evolver Solvent Applicator 79190-XXXXXXXX - Manual (Page 26)

21
Evolver Solventborne Robotic Atomizers - Operation
OPERATION
SPRAY GUN CONTROLS
Atom (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 gun head. During normal operation
with gun 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".)
> 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
HVLP SPRAY
The Evolver HVLP models, when properly set-up, are
designed to provide maximum transfer efficiency by
limiting air cap pressures to 10 psi (0.7 bar) (in the
U.S., this complies with rules issued by SCAQMD and
other air quality authorities). Air cap pressures should
be measured with an optional air cap test kit. (See
"Accessories" in the "Maintenance" section.)
> For HVLP operation (max. 10 psi, -0.7
bar cap pressure), DO NOT exceed the air
inlet pressure, which was read at the gun
base before the tubing manifolds, given
as follows:
PSI (Bar) CAP #
42 (2.9) 48-1
42 (2.9) 481-1
NOTE
BACK PRESSURE -
48-1 and 481-1
Due to the unique cone shape of the MP fluid tips
(nozzle), a slight back pressure is created against the
fluid column. This will reduce the amount of fluid
output. To compensate, increase the fluid regualtor
pressure slightly if necessary. With 10 psi (0.7 bar)
cap pressure, back pressures are approximately 3.5
psi (0.24 bar).
AA-03-02.11