Ransburg Evolver Solvent Applicator 79190-XXXXXXXX - Manual (Page 27)

22
Evolver Solventborne Robotic Atomizers - Operation
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. 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.
Fluid Flow Rate
Fluid flow is adjusted through the robot PLC by varying
the pilot pressure to either an exterior or the on-board
fluid regulator within the spray gun. Fluid pressures
from the circulating system may exceed the maximum
fluid pressure rating of the Evolver gun. Because of
these high fluid pressures, a manual step-down fluid
regulator must be used.
Trigger Control Air
The Evolver guns require a minimum of 70 psig trig-
ger control air pressure to ensure proper operation
of the gun piston.
> Most paints and solvents, including those
listed in Figure 7, 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
!
> Failure to turn voltage OFF during color
change sequence could cause a fire or explo-
sion.
W A R N I N G
!
FLUID VALVE CONTROLS
Trigger, Dump, & Solvent
(See Figure 6)
The fluid valves in the Evolver are 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 trigger valve controls the paint flow to the gun.
When actuated, paint flows through the valve to the
fluid tube and into the spray head.
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 valve
since the trigger valve is intended to cause the fluid
to flow to the gun at the prescribed input pressure.
The solvent valve controls the flow of cleaning solvent
to the gun. When actuated, solvent flows through the
fluid tube and into the spray head. The solvent valve
is not triggered at the same time as the paint trigger
valve to prevent solvent from flowing backward into
the paint line.
DUAL PURGE SPRAYING
The Evolver has optional 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.
When the target part is finished and a color change
is desired, insure voltage is turned off.
The solvent valve controls the flow of cleaning solvent
to the gun. When actuated, solvent flows through the
fluid tube and into the spray head. The solvent valve
is not triggered at the same time as the paint trigger
valve to prevent solvent from flowing backward into
the paint line.
AA-03-02.11