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setting up a spray gun


 
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moday
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Joined: 07 Jul 2008
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PostPosted: Thu Oct 19, 2017 3:04 am    Post subject: setting up a spray gun Reply to specific post Reply with quote

I have an HVLP gun from TSC...not a great gun but I'm trying to use it. I have a regulator at my compressor and there is a regulator that goes on the gun. Any suggestions as to where to set the psi's for each when I try to spray? I'm using primer first and then will use paint. The primer seems a bit thicker but I plan to thin them both....

Any suggestions or advice is appreciated in advance. May not be a real good gun but was not their cheapest one. I bought paint thinner for clean up and the little brushes for clean up.

thanks, MO
 
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Rod (NH)
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Joined: 18 Jan 2002
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Location: SE New Hampshire

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PostPosted: Thu Oct 19, 2017 4:20 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

Try This:
Spray Gun Air Pressure

 
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TJ in KY
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Location: Kentucky

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PostPosted: Thu Oct 19, 2017 4:37 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

Rod (NH) just posted an excellent link. There are many others who helped me when I painted my first tractor last year. Rod (NH), CNKS, Steven Newell come to mind there are many others. There is a lot of information on this site by searching the archive.
If you go to modern view and click on search, and then search archive. Type in what you are looking for and chose the forum (Paint and body work) and you will get a lot of information.
Searching the archive

 
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showcrop
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Location: Chester NH

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PostPosted: Thu Oct 19, 2017 4:41 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote


Thinning the primers may be counter productive. Read and follow the instructions on the labels. High build primers, especially polyester are supposed to go on thick.
 
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Stephen Newell
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PostPosted: Thu Oct 19, 2017 7:53 pm    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

The pressure would vary depending on the gun and the paint. Unless you are using a very long air hose the pressure regulated at the compressor is good enough. Start with 40 psi and see how it works. If it seems like it's putting out too much paint turn it down. Turn it up if it sprays like a rattle can.
 
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dr sportster
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PostPosted: Fri Oct 20, 2017 10:39 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

Your true PSI is the gauge at the spray gun. If you hold the gun sideways you can observe the point away from the gun that the paint is most atomized. That is your distance from the work. Too far and small droplets rejoin each other get larger and become runs in the work. You want the point where the droplets are small.
 
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Duane WI
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PostPosted: Sat Oct 21, 2017 2:48 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

A simple suggestion is once you get the spray gun working the way you want right down every setting. Air pressure, how many turns open the needle valves are open, etc. That is what I did and it makes it easier to get the gun working the next time you use it. You might find different paints have different settings. If you are like me and don't paint very often it really helps.
 
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dr sportster
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PostPosted: Sat Oct 21, 2017 7:21 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

Some type of surface to test spray on is important . An old metal panel or even cardboard . Something to test your pattern on.
 
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steve706
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PostPosted: Wed Oct 25, 2017 10:53 am    Post subject: Re: setting up a spray gun Reply to specific post Reply with quote

25 to 30 psi max is the general norm for help guns. This is a pretty good video on how to set up a help gun. https://youtu.be/T5jPZQA0pQY
 
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