30
31
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 560 2-K can be adjusted as follows:
Adjusting the jet pattern
Adjustment of the material flow rate
Adjustment of the Material Pressure
This adjustment can only be made at the controls of the pump or the material pres-
sure tank. Please comply with the operating instructions and safety warnings issued
by the manufacturers concerned.
R
B
2
1
3
Adjustment of the Atomizing Air Pressure
The atomizing air pressure is adjusted at the air pressure reducing valve of the com-
pressor system. Please comply with the operating instructions and safety warnings
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 offers a
great variety of air cap/-material nozzle/needle combinations for this purpose.
Correcting of Spray Pattern Imperfections
The following table shows what to do to correct a spray pattern.
Spray pattern
test
Deviation
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 nozzle air pres-
sure
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
spherical
•
Reduce material pressure
•
Increase atomising air pressure
5.5
Retooling of Spray Gun
Combinations of air cap, material nozzle and needle, designed to match specific
spraying media tpyes and grades, form a unit - namely the nozzle insert assembly.
In order maintain the desired spray-finish quality standard always replace the com-
plete nozzle insert assembly.
Warning
Prior to retooling: Make sure that the spray gun is in unpressurized condition, i.e. all
air and material inputs must be shut off - if not, imminent risk of injury.
Note
In order to perform the following procedures please use the drawing at the beginning
of these operating instructions.
Note
When mounting the nozzle, the material needle should be in a flashed condition.
An optimum spray pattern can be adjusted by
using control screws R and B.
The control screw R regulates the round jet, the
control screw B the wide/flat jet.
The material flow rate for the component
(B) can be adjusted by turning the adju-
sting screw (1).
Turn cap (2) from the standard position
(= notch mark on the piston housing)
•
to the inside in order to decrease the
material flow rate.
•
to the outside in order to increase the
material flow rate.
The material flow through the nozzle can
be performed without using atomizing air,
when the drawbar (3) is used.
desired spray result
