Using the Spray Gun
The PS1 Spray Gun is fed with paint by a siphon (or suction) effect from the paint
cannister. The air flow through the air cap draws paint up the feed tube, into the
nozzle assembly, where it is atomised and sprayed forward.
Mix the paint to the correct viscosity for spraying according to the manufacturers
instructions, and strain it into the paint cannister through a fine mesh filter. When
mixing the paint, make sure that you have enough thinners left to clean the spray
gun after use.
Do not fill the paint cannister to more than 3/4 full - i.e. no more than 750cc. Make
sure that the top edge of the cannister and the sealing gasket are clean and free
from damage before mounting the cannister on the gun.
Set the spray pattern and fluid flow using the adjustment screws on the spray gun.
The spray pattern is variable between round and fan by adjusting the air flow
through the air cap. Turn the spray pattern adjusting screw anticlockwise to increase
flow and give a fan shaped spray pattern. Turning clockwise to close off the air
flow will give a circular pattern. Set the fluid flow according to the paint in use and
the spray pattern by using the fluid flow adjustment screw; anticlockwise to increase
flow, clockwise to reduce flow. As the width of the spray is increased, fluid flow will
also need to be increased.
The air pressure needed will vary according to the paint in use, with thicker paints
needing greater pressure. For most paints, a pressure of between 0.75 and 2.5 bar
(approximately 11 - 36 psi) is adequate.
To reduce overspray and to obtain maximum transfer efficiency, always use the
lowest possible air inlet pressure that produces an acceptable spray pattern.
NOTE: A good spray pattern is achieved when there is an even amount of material in
a fine spray throughout the pattern.
A poor spray will concentrate the paint in the centre of the spray and produce a
blotchy finish
To determine the correct spray pattern and volume for your particular application,
proceed as follows:
1.
Turn the Spray Pattern Adjuster fully anticlockwise .
2.
Pull the trigger to test the pattern, aiming at a piece of card/newspaper etc.
3.
Continue pressing the trigger whilst turning the Adjuster clockwise until the
pattern is correct.
NOTE: If you have carried out the above procedure and the spray pattern is still not
satisfactiory.....then it is likely that the paint requires further thinning.
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