Generating A Spray Pattern Test; Correcting Spray Pattern Flaws - WALTHER PILOT GA 9010 Traducción Del Manual De Instrucciones Original

Attention
The material pressure must not be set higher than 6 bar for the GA 9010 Marking
and 4 bar for the GA 9010 Marking-MB, otherwise safe operation of the spray gun
cannot be ensured.
Set the control air pressure to at least 4 bar, so that operation of the spray gun can
be started.
Warning
Always depressurise the spray gun after work is completed. The pressurised lines
may rupture and persons standing nearby may be injured by the escaping material.
5.2

Generating a spray pattern test

A spray pattern test should always be generated when:
• the spray gun is used for the first time.
• the spray material has been changed.
• the gun was disassembled for maintenance or repair.
The spray pattern test can be made on a sample work piece, sheet metal, cardboard
or paper.
Warning
When spraying materials, do not hold hands or other parts of the body in front of the
pressurised nozzle of the spray gun - risk of injury.
Warning
When starting the spray gun, make sure that there are no persons in the spraying
range - risk of injury.
1. Start operation of the spray gun to generate a spray pattern test (see 5.1 Start-
up and shut-down).
2. Monitor the spray pattern test and change the settings on the spray gun,
as required.
Adjusting the material flow volume
The material flow volume can be adjusted with the raster setting (21). Screwing in
the adjusting screw reduces the material flow volume, and vice versa.
Regulating the material pressure
This setting can only be made at the pump or the pressure vessel. Observe the
manufacturer's directions and safety instructions.
Regulating the atomiser air pressure
The spraying pressure is set by the compressed air reduction valve of the compres-
sor system Observe the manufacturer's directions and safety instructions.
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5.3

Correcting spray pattern flaws

Spray pattern Description
with flaws
Spray pattern uneven
and heavily run spray
mist on one side
Spray pattern bulging
too much in the centre
Spray pattern splitting
slightly
Crescent-shaped spray
pattern
Spray pattern heavier
on one side
No sharp edges,
coarse spray mist
Spray pattern not
circular,
insufficient material in
the centre
Misshapen spray
pattern
Spray pattern too large
and oval
Spray pattern not
uniform
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Desired spray result
Possible cause Remedy
Thoroughly clean the
Horn orifice on air cap
horn orifices
contaminated
If necessary, replace
Faulty air cap
air cap
Material flow or viscosity Reduce material flow
too high Adjust viscosity
Atomiser air too high Adjust atomiser air and/
Material viscosity too low or viscosity
Air holes on air cap Thoroughly clean the
contaminated air holes
Faulty air cap or material Replace air cap and/or
nozzle material nozzle
Atomiser air too low Adjust atomiser air
Atomiser air too high Adjust atomiser air and/
Material viscosity too low or viscosity
Faulty air cap or material Replace air cap and/or
nozzle material nozzle
Material flow or viscosity Reduce material flow
too high Adjust viscosity
Material needle closed Open material needle
too far wider
Material viscosity too high Adjust viscosity
Material nozzle too large Use smaller material
nozzle