Ransburg RMA Direct A12867 - Manual (Page 49)

RMA-303 Direct Charge - Operation
LN-9266-11.3 46
OPERATION
!
W A R N I N G
•
Operators must be fully trained in safe oper-
ation of electrostatic equipment. Operators
must read all instructions and safety precau-
tions prior to using this equipment (see NFPA
-33).
As with any spray finishing system, operation
of the RMA-303 involves properly setting the
operating parameters to obtain the best finish
quality for the coating material being sprayed,
while maintaining correct operation and relia-
bility of the equipment used. Adjustments to
operating parameters, which cover spraying,
cleaning, and on/off control, include:
•
Coating materials
•
Fluid flow rate control
•
Fluid valve control
•
Turbine speed
•
Bearing air adjustment
•
Shaping air
•
Brake air
•
Electrostatic voltage
•
Target distance
!
W A R N I N G
•
Electrical discharge of a high electrical ca-
pacitance fluid/paint system can cause fire or
explosion with some materials. If arcing oc-
curs when a specific coating material is used,
turn the system off and verify that the fluid is
non-flammable. In these conditions the sys-
tem is capable of releasing sufficient electrical
and thermal energy to cause ignition of spe-
cific hazardous materials in the air.
FLUID FLOW RATE CONTROL
Externally mounted fluid regulators or gear
pumps are typically used to control fluid flow.
Paint is supplied to the RMA-303 by way of
the tubing bundle through the robot arm.
The atomizer assembly is equipped with micro
valves which are pneumatically operated to
direct the flow of paint to either the feed tube
or dump line and to supply an intermittent sol-
vent to clean the interior and exterior of the
bell cup.
The feed tube has several sized removable
tips available from .7mm - 1.6mm (.027-inch -
.062-inch).. The viscosity and volume of the
coating material being sprayed determine the
correct size of feed tube tip for each installa-
tion. (Reference “Fluid Tip Flow Rate” chart in
the “Introduction” section.)
Fluid Flow Rate Check
In the test mode, the flow rate can be meas-
ured by removing the bell cup from the atomiz-
er, turning the fluid flow on, and capturing the
material in a graduated beaker or measuring
cup for a fixed period of time (shaping air, high
voltage, and turbine air must be off).
! W A R N I N G
•
Danger of shock and/or personal injury
can occur. Proper grounding procedures
must be followed. Personnel must never
work around the turbine when the turbine
is spinning or when high voltage is turned
on.