AIRLESSCO TS1500 - Manual (Page 23)

Troubleshooting
3A1183D 23
Airless Spray Gun
Problem Cause Solution
Coarse spray Low pressure Increase the pressure
Excessive fogging (overspray) High pressure Reduce the pressure to satisfactory pattern
distribution.
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 tip group)
Too much material Nozzle too large Use smaller tip
Material too thin Use smaller tip
Pressure too high Reduce pressure
Too little material Nozzle too small Use next larger tip
Material too thick
Thin distribution in center of
pattern “horns” Worn tip Change to new tip
Wrong tip Use nozzle with narrow spray angle
Thick skin on work Material too viscous Thin cautiously
Application too heavy Reduce pressure and/or use tip in next
smaller tip size
Coating fails to close and
smooth over Material too viscous Thin cautiously
Spray pattern irregular,
deflected Orifice clogged Clean carefully
Tip damaged Replace with new tip
Craters or pock marks, bub-
bles on work Solvent balance Use 1 to 3% “short solvents remainder “long”
solvents (this is most likely to happen with
material of low viscosity, lacquers, etc.)
Clogged screens Extraneous material in paint Clean screen
Course pigments Use coarse screen if orifice size allows.
Poorly milled pigments (paint
pigments glocculate) Use courser screen, larger orifice tips. Obtain
ball milled paint. If thinner had been added,
test to see if a cover screen. Incompatible
drop placed on top of paint mixes or flattens
out on the paint mixture and thinners on the
surface. If not, try different thinner in fresh
batch of paint.
Excess paint builds on tip
guard Spray gun too close to surface Hold gun further from surface sprayed
Pressure setting too high Reduce pressure setting
Drips, spits from tip Valve seat and/or ball in gun
head damaged or worn Service spray gun, replace valve assembly