When I am spraying on my practice hood, it seems like my paint droplet size is a bit large, I seem to be doing this with everything, primer, base, and clear. What is the best way to fix this? Tip size, air or fluid adjustment?
I used 1.7 tip for primer, 1.5 tip for base and clear, have air into hvlp gun set at I believe 35-40 psi (since I cant measure at cap).
Paint droplet size
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You need to verify the inlet pressure for your gun, some
do require more than that and air pressure would definetly change the drop size. I have a gun that takes 45 psi at the inlet and one that takes 16 psi so they do vary a lot. And that's measured at the inlet with trigger pulled. Both are 10 psi at the tip. JC.
(It's not custom painting-it's custom sanding) |
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,,,,Tip size
"The number of parasites in the USA has now eclipsed the number of productive members of society"
Capt Rick Hiott. www.reelfishhead.com |
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Screw in the fluid control, turn up the air pressure....This will make the droplet size smaller. 1.5mm is a bit large for base/clear but "can" work if its dialed in and your gun travel speed is adjusted to your rate of flow (speed up).
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A 1.5 is good for clear,,,but to big for base.
"The number of parasites in the USA has now eclipsed the number of productive members of society"
Capt Rick Hiott. www.reelfishhead.com |
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Good if your trying to put out a fire...well at least for me! |
If its a dark solid color or even white, I would say 1.5 would "work" but wouldn't be ideal by far.... For clear, hose it on baby! If you're spraying vertical panels, no....1.4 or even 1.3 is much better for fear of sags/runs. Flat laying large panels can take a little thicker coats without worry. 1.3 or 1.4mm tip is much better for all types of base coat colors, better control and atomization.
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You can spray with a bigger tip size and still get good results, it's all in the gun adjustment.
When I first went to HVLP I sprayed everthing with a 1.8 for a couple of years before I learned what worked better. I got really good results with that large tip, so I don't believe the tip size is as important as everyone believes, it's another small piece of the puzzle, but definetly not a deal breaker. To small is much worse than to big. If it's a decent gun and you know how to adjust it you can get good results with most any std tip (within reason). JC.
(It's not custom painting-it's custom sanding) |
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I agree with most all input at this point. In light of the tools you have at hand I would go with Bobby first. Turn in the fluid adj. half a turn in at a time while practicing after each adjustment.
Never argue with an idiot, he will drag you down to his level and beat you with experience.
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Just remember, choking down a gun can hurt its performance, and on some it will effect the spray pattern. I was told by a DeVillBiss rep many years ago that you shouldn't choke a gun down. You should change the fluid tip. I always run my guns wide open!
"The number of parasites in the USA has now eclipsed the number of productive members of society"
Capt Rick Hiott. www.reelfishhead.com |
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33 posts
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