Ransburg Aerobell 33 AER5000, AER5001 - Manual (Page 37)

Aerbell 33 Rotary Atomizer - Maintenance
Ransburg
33 LN-9521-00.4
Low Transfer
Efficiency (or light
coverage)
No Turbine Air
Speed Feedback
Fault
No Fluid Flow
Low or no high voltage
Poor grounding of parts being
coated
Excessive turbine speed
Excessive shaping air
Excessive target distance
Turbine drive air not present
Bearing air return signal not
present
Brake air is activated
Damaged fiber-optic cable between
atomizer and control panel
Connection at the fiber-optic
transmitter is loose
Fiber-optic transmitter failure
Turbine is not rotating
Fluid regulator does not actuate
Verify high voltage at bell cup edge. Normally,
a high voltage setting of 100kV is appropriate
for most applications.
Verify that parts being coated are properly
grounded (the electrical resistance between
the part and ground must not exceed 1
megohm).
For optimum transfer efficiency and spray pat-
tern control, the bell rotational speed should
be set at the minimum required to achieve
proper atomization of the coating material.
Shaping air should be set at the minimum
volume required to gently direct the spray
pattern toward the part being coated. Exces-
sive shaping air will cause some atomized
particles to "blow-by" the part or bounce back
onto the atomizer.
The recommended target distance is between
8 and 12 inches (see "Target Distance" in the
"Operation" section of this manual).
Verify supply air pressure.
a. Verify bearing air return signal.
b. Increase bearing air supply pressure to 90
psig (±10 psig)
Remove brake air signal (turbine air and brake
air must be interlocked to prevent both from
being used simultaneously).
Repair or replace fiber-optic cable.
Re-install fiber-optic cable and tighten the
compression nut.
Replace fiber-optic transmitter.
Verify rotation of turbine (the paint valve air
pilot must be interlocked with the turbine speed
feedback signal to ensure that paint does not
flow into the air bearing).
a. Verify fluid supply.
b. Verify that air pilot signal is present.
Figure 15: Troubleshooting Guide (Continued)
TROUBLESHOOTING GUIDE
(Cont.)
General Problem Possible Cause Solution