Graco 333013B, Инструкция - Каталог запасных частей

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Operation
24 333013B
5. Continue to increase the fluid pressure and spray
test patterns. Do not exceed 3000 psi (21 MPa, 210
bar) fluid pressure. When the particle size remains
constant, the fluid is being atomized at the lowest
possible fluid pressure.
For improved atomization at lower fluid flow rates,
change to a smaller tip orifice size.
6. Turn on the atomization air (A1) and adjust the air
pressure until the tails disappear.
See Spray Pattern Troubleshooting on page 34 to
correct spray pattern problems.
7. The pattern width can also be reduced by applying
fan air pressure (A2).
Adjust the Electrostatics
1. Shut off the fluid supply.
2. Prepare the isolation system for high voltage opera-
tion.
3. Turn on the turbine air (TA) and adjust the air pres-
sure per the settings in Table 1 . Set the proper
pressure at the turbine air hose inlet
when air is
flowing .
4. Check the turbine speed of the gun by checking the
indicator light on the standard gun body or for the
smart gun check the actual turbine speed on the Pro
Xp Auto Control Module. See Table 2 . Adjust the
air pressure as necessary to keep the indicator light
green or the values within 100-750 Hz.
NOTE: Smart models display values not color indicator
lights.
5. Check the voltage output by reading the kV meter
on the isolated enclosure. 45-55 kV is normal.
See Electrical Troubleshooting , page 37 to correct
voltage problems.
F
IG
. 16 Eliminating Tails
Table 1. Approximate Dynamic Turbine Air
Pressures
Turbine Air
Hose Length
ft (m)
Air pressure at turbine air hose inlet
for full voltage
psi (bar, MPa)
15 (4.6) 54 (3.8, 0.38)
25 (7.6) 55 (3.85, 0.38)
36 (11) 56 (3.9, 0.39)
50 (15.3) 57 (4.0, 0.40)
75 (22.9) 59 (4.1, 0.41)
100 (30.5) 61 (4.3, 0.43)
No Air
Too Little Air
Correct
Amount of Air
Table 2. Indicator Colors/Values
Indicator
Color
Description
Green
400-750 Hz
When spraying, the indicator should
remain green, indicating sufficient air
pressure to the turbine.
Amber
<400
If the indicator changes to amber after 1
second, the air pressure is too low.
Increase air pressure until the indicator is
green.
Red
>750
If the indicator changes to red after 1 sec-
ond, the air pressure is too high.
Decrease air pressure until the indicator is
green. Excessive turbine speed can
shorten the bearing life and will not
increase the voltage output.