AIRLESSCO 910E Manuel de service télécharger pdf (Page 13)

DEFECTS CAUSE CORRECTION

Coarse spray Low pressure Increase the pressure.

Excessive fogging High pressure Reduce the pressure to satisfactory pattern distribution.

(overspray) Material too thin Use less thinner.

Pattern too wide Spray angle too large Use smaller spray angle tip.

Pattern too narrow Spray angle too small Use larger spray angle tip (if coverage is OK, try tip

in same nozzle group)

Too much material Nozzle too large Use next smaller nozzle.

Material too thin

Pressure too high Reduce pressure

Too little material Nozzle too small Use next larger nozzle

Material too thick

Thin distribution in Worn tip Change for new tip.

center of pattern Wrong tip Use nozzle with a narrow spray angle.

"horns".

Thick skin on work Material too viscous Thin cautiously.

Application too heavy Reduce pressure and/or use tip in next smaller nozzle

group.

Coating fails to Material too viscous Thin cautiously.

close & smooth over

Spray pattern irreg- Orice clogged. Clean carefully.

ular, deected Tip damaged Replace with new tip.

Craters or pock Solvent balance Use 1 to 3% "short" solvents remainder

"long" sol

marks, bubbles (this is most likely to happen with material of low

on work viscosity, lacquers etc.)

Clogged screens Extraneous material Clean screen

in paint.

Coarse pigments Use coarse screen if orice size allows.

Poorly milled pigments Try different thinner in fresh batch of paint.

(paint pigments glocculate

cover screen. Incompatible

paint mixture & thinners.

TEST THE PATTERN

Good, full Spotty

pattern. pattern

Increase Pressure.

AIRLESS SPRAY GUN TROUBLESHOOTING

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 31 32

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AIRLESSCO 910E Manuel de service Page 13