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Warning
Keep away from the front of the spray gun - imminent Risk of Injury.
Warning
Make sure that nobody is present in the spraying zone when the gun is started
- imminent Risk of Injury.
1. Start the gun to produce a spray pattern sample (
see 5.2 Starting / Stopping
Requirements
).
2. Inspect the sample and readjust the settings of the gun as may be required
(see
5.4 Spray Pattern Adjustments
).
5.4
Spray Pattern Adjustments
The spray pattern of the PILOT WA XV / WA XV needle-pull / WA XV-HVLP can be
adjusted as follows.
Wide and / or Flat Jet Pattern
Wide / Flat and / or Round Jet Pattern
1. Loosen the knurled air cap retaining ring
slightly.
2. Rotate the air cap
horns into
• a vertical position
= flat jet pattern
• a horizontal position
= wide jet pattern
3. Tighten the air cap retaining ring
.
4. Loosen the lock nut
using a Size 11
mm wrench.
5. Turn the fine-adjusting screw
in
• - direction = increase roundness of
spray jet contour
• + direction = increase wideness/
flatness of spray jet contour
6. Once the desired spray jet contour is
adjusted tighten the lock nut
.
Middle-air adjustment (only PILOT WA XV-HVLP)
The adjusting screw
is used to adjusted the middle-
air.
Adjustment of the Material Flow Rate
1. Turn the material Input regulating screw
from its normal position (= notch
mark an the matrial needle adjuster) in
•
– direction = decrease of flow rate.
•
+ direction = increase of flow rate.
Adjustment of the Material Pressure
This adjustment can only be made at the controls of the pumping or circulation
system or material pressure tank. Please comply with the Operating Instructions and
Safety Warnings issued by the manufacturers concerned.
Adjustment of the Atomisation Air Pressure
The atomizing air Pressure is to be adjusted at the air Pressure reducing valve of the
compressor system. Please comply with the Operating Instructions and Safety War-
nings issued by the manufacturer.
If you wish to change the spraying Pattern beyond the adjustments outlined so far,
you must retool the spray gun (see
5.5 Retooling of Spray Gun
). WALTHER offer a
great variety of air cap/material nozzle/-needle combinations for this purpose.
Correcting of Spray Pattern Imperfections
The table below shows what to do to correct a spray pattern.
desired spray pattern
Spray pattern test
Fault
Required adjustment
Spray pattern is split in the
centre
• setting a wider spray pattern
Spray pattern is too thick at
the ends
• Setting a more rounded spray pattern
The spray pattern shows
rather large droplets
• Increase the
atomising air pressure
Material application in the
centre of the spray pattern
is very thin
• Decrease the
atomising air pressure
Spray pattern is split in
the centre
• Increase the nozzle diameter
• Reduce
atomising air pressure
• Increase material pressure
Spray pattern is very spher-
ical
• Reduce material pressure
• Increase
atomising air pressure
