WALTHER PILOT WA 800, Руководство по эксплуатации

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5.4 Spray Pattern Adjustments
The spray pattern of the PILOT WA 800 models 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 pump or the material pressure tank. Please
comply with the operating instructions and safety warnings issued by the manufacturers
concerned.
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.
1
2
B R
B
R
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
• Spray jet should be flatter
Spray pattern is too thick
at the ends
• Spray jet should be rounder
Coarse pearl effect • Increase atomising air pressure
Material application in the
centre of the spray pattern
is very thin
• Decrease atomising air pressu-
re
Spray pattern is split in
the centre
• Increase nozzle diameter
• Reduce atomising air pressure
• Increase material pressure
Spray pattern is very
spherical
• Decrease 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.
Notice
In order to perform the following procedures please use the drawing at the beginning
of these operating instructions.
Replacement of Air Cap and Material Nozzle
1. Unscrew the knurled air cap retaining ring in (pos. 1) from the front body
(pos. 6).
2. Pull the air cap (pos. 2) of the front body.
3. Unscrew the material nozzle (pos.3) of the front body.
4. Screw the desired material nozzle (if necessary change the air distribution ring)
and insert the desired air cap in the front body.
5. Screw the air cap retaining ring in onto the front.
With internal control:
An optimum spray pattern can be regulated by using adju-
stment screws B and R .
The adjustment screw B regulates the wide/flat jet,
the adjustment screw R regulates the round jet.
Without internal control:
The spray pattern is adjusted by a ressure regulator in the
plant (see operating instructions of plant systems manuf-
acturer).
The connection B is for the wide/flat jet,
the connection R is for the round jet.
Turn cap (1) 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 (2).
desireable spray-painting result