Ransburg Evolver 303 Solvent Applicator A11976-XXX - Manual (Page 29)

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 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 regu-
lator. Fluid pressures from the circulating system
may exceed the maximum fluid pressure rating
of the Evolver 303 applicator. Because of these
high fluid pressures, a manual step-down fluid
regulator must be used.
Applicator Trigger Control Air
The Evolver applicators require a minimum of 70
psig trigger control air pressure to ensure proper
operation of the applicator piston.
>
Most paints and solvents, including those
listed in "Polar & 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
!
>
Failure to turn voltage OFF during color
change sequence when solvent is flowing
through the fluid nozzle, could cause a fire
or explosion.
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 9)
The fluid valves in the Evolver 303 are actuated
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.
SINGLE PURGE
SPRAYING
When the target part is finished and a color change
is desired, ensure voltage is turned off.
26
Evolver 303 Robotic Atomizers - Operation
Ransburg
AA-07-03.2