Ransburg MMA-570 Direct_Ind Charge Atomizer A13366 - Manual (Page 77)

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
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 min-
imum 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.
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 simultane-
ously).
General Problem Possible Cause Solution
TROUBLESHOOTING GUIDE - INDIRECT CHARGE
(Cont.)
Low Transfer
Efficiency (or light
coverage) (Cont.)
No Turbine Air
Damaged fiber optic cable be-
tween robot plate and control
panel
Connection at robot or bell plate
is loose
Fiber optic transmitter failure
Bad transceiver module
Excessive vibration
a. Repair or replace fiber optic cable.
b. Bad splice connection or too many splic-
es. Maximum three (3) splices permitted.
Re-install cable and tighten locking set screw.
Replace fiber optic transmitter.
Replace transceiver module.
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
Speed Feedback
Fault
MMA-570 Direct/Indirect Charge - Maintenance
Ransburg
LN-9279-13 74