Ransburg Aerobell (Std.) Rotary Atomizer A12381 - Manual (Page 64)

TROUBLESHOOTING GUIDE (Cont.)
General Problem Possible Causes Corrective Action
Low or No High
Voltage (Cont.)
Low Transfer
Efficiency (or light
coverage)
7. MicroPak or cascade fail-
ure
8. Improper color change
(i.e., paint or solvent in
dump line)
9. Faulty high voltage con-
nection
10. Damaged high voltage
cable
11. Dielectric grease break-
down of high voltage
parts
1. Low or no high voltage
2. Poor grounding of parts
being coated
3. Excessive turbine speed
4. Excessive shaping air
5. Excessive target distance
7. Refer to "MicroPak" manual for detailed
"Troubleshooting Guide".
8. Optimize color change.
9. Verify that high voltage cable is fully sealed in
the cascade and atomizer or junction tank.
10. Remove and inspect/replace.
11. Check cascade and high voltage cable. Re-
place defective parts.
1. Verify high voltage at bell cup edge. Normally,
a high voltage setting of 70-100kV is appropri-
ate for most applications.
2. Verify that parts being coated are properly
grounded (the electrical resistance between the
part and ground must not exceed 1 megohm.
3. For optimum transfer efficiency and spray pattern
control, the bell rotational speed should be
set at the minimum required to achieve proper
atomization of the coating material.
4. Shaping air should be set at the minimum volume
required to gently direct the spray pattern toward
the part being coated. Excessive shaping air will
cause some atomized particles to "blow-by" the
part or bounce back onto the atomizer.
5. The recommended target distance is between
6 and 12-inches (152.4-304.8mm).
(Continued On Next Page)
Aerobell - Maintenance
60 LN-9264-08.2
Ransburg