Compressor/Gun setting

Any questions about tools or supplies. Post your compressor/gun questions here.



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PostPosted: Sun Jan 15, 2017 1:18 pm
I have a base coat that wants 29 psi, I'm pretty sure that's at the gun with full pull. The question is does it matter how high I set the pressure on the compressor side? I was going to set it at 90 and fine tune at the gun.



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PostPosted: Sun Jan 15, 2017 1:34 pm
you have a regulator at the gun,right?
I keep my compressor at 90psi and adjust the regulator I have at the gun accordingly.



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PostPosted: Sun Jan 15, 2017 10:29 pm
Yes, have the regulator at the gun. Do you know if it matters if the compressor is set at 60? Just curious

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PostPosted: Wed Jan 18, 2017 6:02 pm
You set the PSI for the gun-not the paint.
Check your specs for your gun.
I have HVLP's that vary from 16 PSI to 45 PSI.
Guns vary a lot.
JC.

(It's not custom painting-it's custom sanding)

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PostPosted: Wed Jan 18, 2017 9:04 pm
pull the trigger on your gun and set your appropriate air at the regulator on compressor or a wall unit if you have one.

do not choke your air down at the gun if you can help it.


this is the most common mistake painters make...

i would recommend no more than 40-50 to the gun from compressor
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PostPosted: Thu Jan 19, 2017 1:04 am
Thanks for the info, why do you think it matters where the air is set? I was thinking after the gun takes the air in it wouldn't matter. Unless you feel the air doesn't have enough time to even out.



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PostPosted: Thu Jan 19, 2017 9:54 am
I would agree with Dave. Set the regulator on the gun to wide open. Pull trigger and adjust regulator at the compressor so that the gauge on the gun reads maybe 3-5 pounds higher than what you will need. Fine tune with the regulator on the gun as you go to get that perfect pattern.

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PostPosted: Thu Jan 19, 2017 11:13 am
when you restrict at the gun youre making a small hole for the air to go through and causing pressure not volume because the air fighting to get through therefor yes causing turbulence
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PostPosted: Thu Jan 19, 2017 5:35 pm
Dave is right. Most people are just not understanding the difference between pressure and CFM demand. Those typical gun regulators are pea shooter size constrictions not allowing full flow on demand. That is why there are two air specs. on all equipment especially the gun. Guns are air hogs to begin with when it comes to CFM consumption. Choke that down (yes, even with the correct pressure) right at the gun and you'll get inconsistent results and performance. Some guys will just take some fittings and make a T cheater with a pressure gauge they can just snap in at the gun, check pressure, and snap back out. My only suggestion there is make sure you use the same hi-flo fittings as the rest of your system to get a more accurate pressure.
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PostPosted: Thu Jan 19, 2017 6:14 pm
So are the gauges that come on or with the guns from the manufacturer also restrictive?
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