I.C.T.C. Holdings Corporation 1240 manual Troubleshooting Finish Problems

5.2TROUBLESHOOTING FINISH PROBLEMS

Problem		Probable Cause		Solution(s)
Runs or Sags	A. Coating has been over-		A. Add undiluted material and
		diluted		mix thoroughly; flush gun
				with new mixture
	B.	Application speed too slow	B.	Increase application speed
	C.	Improper overlapping	C.	Overlap passes by up to 50%
	D. Needle and Fluid Tip too		D. Check material viscosity;
		large		refer to Sec. 3.3 for proper
				selection
	E.	Film thickness is too thick	E.	Consider spraying too
		for one coat		thinner coats
	F.	Gun too close to surface	F.	Spray 6-8” from the surface
				to be coated
	G.	Insufficient atomizing air	G.	Increase turbine air volume
				output using VSC; experiment
				with different Air Caps
“Orange Peel”:	A.	Insufficient dilution	A. Check viscosity; add
Finish has the texture of an				thinning solvent
orange peel. A dimpled	B.	Incorrect thinning solvent:	B.	Use slower thinning solvent
appearance, often very glossy.		solvent is evaporating too fast		or retarder
	C.	Gun too far from surface	C.	Spray 6-8” from the surface
	D.	Film thickness is too thin	D.	Apply a “wetter” coat
	E.	Incorrect amount of	E.	Adjust turbine air volume
		atomizing air		output using VSC; experiment
				with different Air Caps
	F. Ambient air temperature too		F.	Reduce air temperature in
		high		spray area and/or add
				retarder to coating being
				applied
“Fish Eyes”:	A. Contaminant on the surface		A. Very difficult to correct once
Small round depressions in the		(oil, moisture) preventing the		surface is sprayed. Ensure
paint film. Normally form as		coating from adhering to the		that surface is clean, dry and
soon as part is sprayed.		surface in certain spots		free from any contaminants
				prior to spraying
“Dry Spray”:	A. Gun too far from surface		A. Spray 6-8” from the surface
Surface is dull and rough. Dry	B.	Incorrect amount of	B.	Adjust turbine air volume
paint particles protruding from,		atomizing air		output using VSC; experiment
or sitting on surface. Unlike				with different Air Caps
Orange Peel, Dry Spray is always	C.	Incorrect thinning solvent:	C.	Use slower thinning solvent
low in gloss.		solvent is evaporating too fast		or retarder
	D.	Film thickness is too thin	D. Apply a “wetter” coat
	E.	Application speed too fast	E. Slow down speed of motion
“Blushing”:	A.	High humidity in the spray	A. Reduce humidity in spray
Large whitish areas in the finish		area: moisture has condensed		area and/or add retarder to
		in the coating as it was being		coating being sprayed
		sprayed.
	B.	Incorrect thinning solvent:	B.	Use slower thinning solvent
		solvent is evaporating too fast		or retarder

For all other problems, please contact your local HERO distributor or HERO directly

HERO Operator’s Manual – Page 20 of 23