Ransburg RMA Indirect A11600 - Manual (Page 74)

(Continued On Next Page)
General Problem Possible Causes Corrective Action
Low Transfer
Efficiency (or
light coverage)
(Cont.)
No Turbine Air
Speed Feedback
Fault
3. Excessive turbine speed
4. Excessive robot speed
5. Excessive inner/outer
shaping air
6. Excessive target distance
1. Turbine drive air not
present
2. Bearing air return signal
not present
3. Brake air is activated
1. Damaged fiber optic cable
between robot plate and
control panel
2. Connection at robot or bell
plate is loose
3. Fiber optic transmitter
failure
4. Bad transceiver module
5. Excessive vibration
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. For optimum transfer efficiency, spray pattern
control, bell speed, and robot speed should
be set at the minimum to achieve desired
results of part to be coated.
5. 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.
6. The recommended target distance is between
6 and 12-inches (152.4-304.8mm) (see "Target
Distance" in the "Operation" section of this manual).
1. Verify supply air pressure.
2. a. Verify bearing air return signal.
b. Increase bearing air supply pressure to 90
psig (±10 psig) (620.5 +/- 69 kPa).
3. Remove brake air signal (turbine air and
brake air must be interlocked to prevent both
from being used simultaneously).
1. a. Repair or replace fiber optic cable..
b. Bad splice connnection or too many
splices. Maximum three (3) splices
permitted.
2. Re-install cable and tighten locking set screw.
3. Replace fiber optic transmitter.
4. Replace transceiver module.
5. a. Check bell cup for damage
b. Check bell cup for excessive paint buildup
c. Insure bell cup is tightened properly
d. Check cup and shaft tapers for cleanliness
Troubleshooting Guide (Cont.)
RMA-303 Indirect Charge - Maintenance
Ransburg
70 LN-9252-06.4