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

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
trigger control air pressure to ensure proper op-
eration 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
explosion.
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.
Evolver Solventborne Robotic Atomizers - Operation
22
Ransburg
AA-03-02.12