Not spraying well

SPI white epoxy or any other brand I have used should spray like a dream with just about any spray gun with a 1.4 to 1.7mm fluid tip and a moderate sized air cap. HVLP or RP. I doubt it is your product. I sprayed some last summer with 4 year old activator and it was fine.

What you show could well be a lack of adequate air flow in cfm--check at your hose output with an anemometer. What is your RTS viscosity?
 
D.A.T. said:
SPI white epoxy or any other brand I have used should spray like a dream with just about any spray gun with a 1.4 to 1.7mm fluid tip and a moderate sized air cap. HVLP or RP. I doubt it is your product. I sprayed some last summer with 4 year old activator and it was fine.

What you show could well be a lack of adequate air flow in cfm--check at your hose output with an anemometer. What is your RTS viscosity?
Click to expand...

What is, or does, RTS mean?
 
MikeK said:
How about more pictures.
I really can't tell other than coverage of an issue myself.
Epoxy can spray strange occasionally and Temperature is usually the factor why.
If you have excessive orange peel, runs,dry spray,etc.
Your correct. Equipment.
Click to expand...
The key picture is this one. Never said I have runs. Yes there is a pick of a heavy coat but that was intentional as I wanted to see how that would lay. The only problem is ATOMIZATION.
As I just stated temperature is not the issue unless above 65F is an issue. Everything is above 65!
 

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I wasnt asking anything. The previous post was asking what RTS meant and I was just answering his question.
 
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I would agree, it looks like a gun issue because it looks like it's spattering it on. If the epoxy doesn't feel too thick so you can eliminate that variable, then any time I've had an issue similar to this it's because a seal came out of my gun when I was cleaning it and I didn't realize it, or perhaps a flake or chunk of some paint was lodged inside it, or something was not tightened up all the way, essentially creating an air leak and reducing atomization.

Also a really important one--what kind of cup are you using, and if the cap is vented, is that vent plugged? That is a common cause of spattering as well.

I'm not a pro, but have been spraying this epoxy (and in gray, black, and white) since 2010 I think it is pretty low maintenance and fool proof from a spraying perspective (the one exception is the pigment migration that can occur if you spray it too heavy). In other words, it's never been so finicky that It had to be used with a very specific pressure, etc.
 
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Even a blocked air horn hole.
Tear the Gun COMPLETELY apart and Inspect,clean EVERYTHING.
Find a parts breakdown diagram of It for Reference if you're not familiar with this and specific Parts internally if You feel this is your Issue.
Done any Test sprays on Paper to look at ?
That will tell a Lot.
 
The OP states he has tried two guns--a 1.4 and 1.7. I'd try a known clear hose right off the top of the air tank and only reduce my pressure at the gun there and see what happens.
 
orangejuiced86 said:
I was asking anything. The previous post was asking what RTS meant and I was just answering his question.
D.A.T. said:
SPI white epoxy or any other brand I have used should spray like a dream with just about any spray gun with a 1.4 to 1.7mm fluid tip and a moderate sized air cap. HVLP or RP. I doubt it is your product. I sprayed some last summer with 4 year old activator and it was fine.

What you show could well be a lack of adequate air flow in cfm--check at your hose output with an anemometer. What is your RTS viscosity?
Click to expand...
My
Click to expand...
 
One thing I would do is break down the gun with the issues, clean it well, paying attention to the various small holes in the nozzle and other places. Make sure you don't have a clog somewhere. Make sure the nozzles holes aren't wallowed out from improper cleaning (using something metallic to go through the holes) When you reassemble make sure that everything is tight, that any gaskets are where they should be etc.

Then do as Barry suggested. Heat the epoxy to 90+. Use your Prolite and spray a test piece. If it works then you know that it is either a gun or temp issue. Atomization issues can be caused by the thickness of the material. Warm the material, it thins and flows easier therefore helping atomization. It's all related.

So if it works doing it that way then you need to look at your guns that were giving the issues. Blockages in the nozzle/needle area are the most common. The fluid tip not being completely seated will also cause sputtering. I don't know what gaskets your gun uses, one that is missing or bad can also cause it to sputter and not atomize correctly. Look for a gun diagram online of your specific gun to see that you have all the gaskets in place and that everything is assembled correctly.

If you can't get the Prolite to spray well then it is an airflow issue. I doubt that is the case but that would be the only thing left. Cheater valves. a blockage in your air hose, or piping for example.
 
After verifying the pressures in the system I believe I have moisture in my system. I have more desiccant coming in today or tomorrow and will clean everything out. Will let you know how it comes out real time. After looking at the results it makes sense.
 
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Nochain said:
After verifying the pressures in the system I believe I have moisture in my system. I have more desiccant coming in today or tomorrow and will clean everything out. Will let you know how it comes out real time. After looking at the results it makes sense.
Click to expand...

Your upcoming update will be greatly appreciated. Sometimes people ask for help with an issue and after receiving possible fixes, we never hear back from them letting us know what worked to correct the issue.

Thank you,
 
Nochain said:
After verifying the pressures in the system I believe I have moisture in my system. I have more desiccant coming in today or tomorrow and will clean everything out. Will let you know how it comes out real time. After looking at the results it makes sense.
Click to expand...
Moisture and atomization are quite different. What was it that made you think atomization? Were you seeing water droplets or vapor? If so then yes moisture sounds like it is your issue? How do you have your lines setup? Just replacing the dessicant will only fix it for a short time if you have your filters too close to your compressor or your lines are run improperly.
 
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