Ransburg RMA Dual Purge Direct A12300 - Manual (Page 46)

RMA-303 Dual Purge/Direct Charge - Operation
As with any spray finishing system, operation of
the RMA-303 involves properly setting the oper-
ating parameters to obtain the best finish quality
for the coating material being sprayed, while
maintaining correct operation and reliability 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/Trigger Control
• Turbine Speed
• Inner Shaping Air (Pattern Control)
• Outer Shaping Air (Cut-In Air)
• Brake Air
• Electrostatic Voltage
• Target Distance
OPERATION
41
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 solvent to clean
the interior and exterior of the bell cup.
The feed tube has several sized removable tips
available from .7mm to 1.6mm (.027-.062-inch).
The viscosity and volume of the coating material
being sprayed determines the correct size of feed
tube tip for each installation. (Reference "Fluid
Tip Flow Rate Chart" in the "Introduction" section.)
Fluid Flow Rate Check
In the test mode, the flow rate can be measured
by removing the bell cup from the atomizer, 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).
Ransburg
LN-9263-08.5
† Operators must be fully trained in safe
operation of electrostatic equipment. Oper-
ators must read all instructions and safety
precautions prior to using this equipment
(see NFPA-33).
† 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.
W A R N I N G
!
W A R N I N G
!
† Electrical discharge of a high electrical
capacitance fluid/paint system can cause
fire or explosion with some materials. If
arcing occurs when a specific coating
material is used, turn the system off and
verify that the fluid is non-flammable. In
these conditions the system is capable of
releasing sufficient electrical and thermal
energy to cause ignition of specific hazard-
ous materials in air.
W A R N I N G
!