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1. 05:17 AM - Re: Need help with HVLP gun (Snow, Daniel A.)
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| Subject: | RE: Need help with HVLP gun |
--> RV9-List message posted by: "Snow, Daniel A." <Daniel.Snow@wancdf.com>
Bob, I have a similar setup and called AFS when I had the same problem. They instructed
me to do two very important things: 1) Increase air pressure such that
you maintain the required air pressure at the gun with the trigger pulled continuously.
That may mean turning the pressure up to 50-60 psi at the tank.
2) Thin, thin, thin. I don't have a viscosity cup, so the guy at AFS told me to
thin it up to about 2 parts paint to 1 part water.
Of course you probably already know to just barely fog the pieces with the first
pass, wait 3-5 minutes and lightly spray in the perpendicular direction, wait
3-5 minutes and lightly spray, etc.
I don't have the numbers here at work, so I suggest you call AFS. The owner is
very friendly and willing to spend time explaining how to use his products.
Good luck.
Daniel Snow
RV-9A wings finished, waiting for slow-build fuse
Jacksonville, AL
Time: 04:10:54 PM PST US
From: "Bob Smith" <rvator@lindonnet.com>
Subject: RV9-List: Need help with HVLP gun
--> RV9-List message posted by: "Bob Smith" <rvator@lindonnet.com>
I got a new HVLP gun (Alltrade from Costco) and attempted to use it this
weekend to prime some parts for my ailerons. Unfortunately, I could not get
a good spray pattern out of it. It seemed no matter what I tried, it would
only spray a very week, splattery pattern - the paint did not atomize very
well at all. I'm using AFS water-based primer, BTW. Pressure was at 40
psi, then increased to 45 (the gun says use max of 43). I did not thin the
primer because I've had good luck spraying it straight out of the bottle in
the past with my high-pressure touch-up gun. I ended up finishing the job
with my old gun, which does a good job, but I was hoping to significantly
reduce the overspray and amount of paint vapor in the air (and wasted
paint).
The little pamphlet that came with the gun was of little help; I tried its
recommendations for changing the flow and pressure. Anybody here have
experience with a top-feed HVLP gun that could give me some pointers?
Thanks much,
Bob Smith
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