Ransburg Evolver 303 Dual Purge Solvent Robotic Applicator A12374-XXX - Manual (Page 31)

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Evolver 303 Dual Purge Robotic Atomizers - Operation
> Most paints and solvents, including those
listed in "Polar and Non-Polar Solvents Chart" in
the "Maintenance" section, are toxic to a certain
degree and flammable or combustible. Use
them only in a well ventilated atmosphere. Use
protective equipment as required in the Material
Safety Data Sheet supplied with the substance.
W A R N I N G
!
> 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
FLUID VALVE CONTROLS
Trigger and Dump(See Figure 12)
The fluid valves in the Evolver 303 dual purge are actu-
ated by an air signal. The air pressure must exceed 70
psi (4.8 bar) to assure proper actuation of the valve.
Applying air to the valve actuator turns on the fluid
flow for the valve.
The paint trigger valve controls the paint flow to
the applicator. When actuated, paint flows through
the valve to the coiled fluid tube and into the spray
head.
The dump valve controls the paint flow through the
dump line. When actuated, paint flow is directed
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
valve since the paint valve is intended to cause the
fluid to flow to the applicator head at the prescribed
input pressure.
DUAL PURGE SPRAYING
The Evolver 303 dual purge has true dual purge
capability. This means the applicator can continue
to spray paint, at voltage, while side "B" or "Paint 2"
is being flushed or cleaned. To operate in the dual
purge mode, two (2) separate color valve systems
must be installed. This applicator should be used
with the MCV Dual Purge Color Changer.
When the target part is finished and a color change is
desired, voltage does not need to be turned off. When
finished spraying with color "A", shut off color "A" (P1.
IN/P2/IN). Trigger on the solvent (SOL), and acuate
the applicator. This will clean the coiled fluid tube
and applicator spray head, by pushing the remaining
paint out the front of the applicator. Next, load color
"B" (P1.IN/P2.IN) and begin spraying with color "B".
While continuing to spray color "B", open the dump
line corresponding to the line color "A" is in (DL1/DL2)
to flush color "A" through the dump line.
When the cleaning cycle with solvent is complete,
an air purge for several seconds is recommended to
clean and dry the ID of the dump line hose.
Paint Viscosity
The applicator is capable of atomizing paint of most
any desired viscosity, however, it is recommended to
keep the material viscosity as low as possible. This
allows spraying at lower fan and atomization air
pressures which result in less overspray and higher
transfer efficiency.
Fluid Flow Rate
Fluid flow is adjusted through the robot PLC by varying
the pilot pressure to an exterior fluid regulator. Fluid
pressures from the circulating system may exceed
the maximum fluid pressure rating of the Evolver
303 dual purge applicator. Because of these high
fluid pressures, a manual step-down fluid regulator
must be used.
Applicator Trigger Control Air
The Evolver 303 dual purge applicators require a
minimum of 70 psig trigger control air pressure to
ensure proper operation of the applicator piston.
AA-08-01.1