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my airbrush hates me!
28 replies to this topic
Posted 15 October 2004 - 12:57 PM
I do a lot of test srapying each time I paint.
I do this on good old scrap cardboard.
I make sure the mix is right and the pattern dailed in.
Starting and stopping to check for clogs.
I make all the adjustments before any bait gets painted.
Saves alot of head aches.
Waste is very little compared to the saved clean ups, and redos.
Some times , some days I just can not paint, so I give up that day.
Smaller the pattern, finer the tip, the thinner the paint must be.
And it must be a fine pigment.
Posted 20 October 2004 - 09:51 PM
I have been using a Paasche for 10 years and did not have the problem you guys are talking about. Too thick of paint is a likely suspect, but you will know that with the first trigger pull. I keep my airburshes very clean!!!
When I am not using them the heads are soaking in thinner in a cup I modified to fit the airbrushes. Even acrylic or waterborne paints need to be soaked in lacquer thinner or M.e.K. to loosen up hardened pigment. When the carrier or water in you paints dry, the pigment is the same as lacquer or enamel and can only be removed with strong thinner. I even have an actual Spray Gun Kleener made by Kleen and Strip when the tip gets really dirty to soak my parts in. If you are getting a stutter in the airflow, this usually indicates the whole tip asssembly is not tight enough. Careful, I have cracked tips off trying to get them too tight. PM me if you still have problems......
Posted 20 October 2004 - 11:43 PM
Not sure what you mean but the tips need to be tightened. I rinse everything real well in warm water after each session of spraying and things look totally clean to me but I will start soaking the tips in thinner. Most of the problems I have been having are with the metallic colors but do have hassles with all paints. I found that by turning the PSI up to about 45 alot of my troubles have gone away.
I posted this same question on a Yahoo Airbrush Group and half the people told me it was the Wal-Mart Paint and half told me the Wal-Mart paint works fine, lol. Go figure...sounds a bit like our presidential candidates.
Posted 21 October 2004 - 08:36 AM
Jed, don?t soak your single action o-ring on your needle in thinner, or you it will limit the life on it.
Posted 21 October 2004 - 12:00 PM
No need to soak the tips in thinner.
Just use a q-tip with acitone on it to clean them up as nessary.
Cleans the tip, cup out just fine.
Then you can keep saoking in water.
45 psi seams a bit high.
Never though of this before, but where are getting the psi rating at?
Tank, line, or just before the gun.
I have mine gauged right to the coupling of the air brush hose, and regulated right there.
Also how often is the compressor kicking in, and what is the drop that it kicks in at?
Posted 21 October 2004 - 01:35 PM
The 45 PSI came right from Paasche and to be honest really helped things start working for me. I also met a guy through Ebay that does some of the most amazing paint-jobs I have ever seen on cranks and he told me to run about the same pressure. I will try to reduce it some next time and see what happens though now that I have thinned the paint some from what I was using before.
The psi dial is on the tank and it holds very steady so long as the tank is allowed to refresh itself. I can spray for about 10 minutes or so before it will kick in...scares me half to death everytime it does! It kicks in at about 100# in the tank and shuts off at 120.
Posted 21 October 2004 - 02:00 PM
I rarely ever run that high but I have had to in the past.
One thing for sure is at that psi you will have suction.
20-35 is where most of my work is done.
But the spray is well atomized at that setting.
But can you control it very well?
Over spray has to be a problem, paint has to bounce a little.
Glad you are getting some where.
Posted 23 October 2004 - 01:20 PM
"Overspray" would be an understatement Rich. The good news is that one side of my shop has now been repainted so starting today I am turning my chair to face the other way....should have the other side painted within a week or so.
I have been having a large amount of trouble with overspray at all air pressures, particularly when working on the belly...the beer belly. Last night though I turned the brush down to about 20# and it definitely helped reduce this problem but certainly hasn't eliminated it. I find at 20# there is fairly narrow window of where the paint is either "too wet" and hits the bait looking like water color paints or too dry and hasn't properly atomized. Things are improving though as last night I was able to keep spraying for quite some without clogs, wooohoo!