H& S infinity problems help

[bazers]

Hi guys I bought a infinity air brush about four months ago and got overspray all the time ( some of you may remember ).[ATTACH]316716[/ATTACH][ATTACH]316717[/ATTACH] I put it down to getting used to it but am still having problems so I thought it must be the compressor as it is old and gauge don't work very well so I bought a A S 186 on a few recommendations ( and thanks for all the input on that is is great) but I am still having problems see photos . I have used different settings and paint thinning but cant get a clean spray, any help would be great.

the 15 ,21, 32 is p s i . and 50 50 is thinners to paint on 1st pic. 2 paint to 1 thinners on second pic.

bazers

[Wouter]

normally overspray has nothing to do with the compressor. In general it means that there's still some mess in your airbrush from previous sessions, probably in the nozzle which clogs the paint and makes that it sprays like that. Thinning it heavier might help as well. But I'd suggest you give the airbrush a thorough cleaning and preferable put it even in an ultrasonic cleaner (these aren't too expensive these days, mine cost 25€)

Cheers

[Steven000]

Barry, it might be a silly reply but have you ever checked for water inside the compressor-tank? (condensation)
If it's an old one and you never got the water out there might be coming to much additional water with your airflow.

Just a thought, it's probably not it...

edit: You would get the opposite of overspray I guess :thinking:

Goodluck
Steven

[Tim Marlow]

Hi Barry
Steven has made a good call there, worth checking if you haven’t....it’s worth draining moisture after every use, especially in the damp seasons such as autumn...

[Wouter]

I've had moisture in the past and for years now I use a moisture trap between the ab and the airhose. Works out well. But as Steven states, that doesn't cause overspray ^^

Cheers

[Tim Marlow]

Hi Wouter, might not cause overspray, but it could cause sputtering, which gives similar symptoms....

[bazers]

Thanks for comments guys I never checked for water but would I get it in a brand new compressor? .

[Tim Marlow]

Hi Barry
You’ll get it every time you compress, then decompress, air. The compression increases the concentration of moisture present and the release of air cools the compressed gas, causing condensation to form....

[JR]

Barry.
I use the same AB.
If after trying Tim and Wouters suggestionsre the condensation, and still have problems (My AS186 had a moisture trap with it ) have you ever considered Vallejo improver ? I had problems with paint flow, thought it was caused as Wouter mentioned, it was , that small piece of hard paint stuck inside the tip ,even after a clean through.

To counteract that I bought a bottle of the flow improver. Added as suggested and with a little thinner as well I find it sprays well. This is supposed to reduce the occurance of paint drying on and in the tip.

I had excatly the same problems with spray, some times it was good some times poor , now mostly good ! Bought an ultrasonic cleaner , helps get into those tight spots, also use an Iwata lube , keeps the trigger and other moving parts smooth in use .
John

[rtfoe]

Hi Barry,

You may have a crack or split at the tip of your nozzle. Air instead of flowing through the conical aperture over the needle traps paint in the crack and splatters the paint. This is more apparent at lower PSI's. You will need to unscrew the tip and replace it.

Cheers,
Richard

[JR]

Hi Barry,

You may have a crack or split at the tip of your nozzle. Air instead of flowing through the conical aperture over the needle traps paint in the crack and splatters the paint. This is more apparent at lower PSI's. You will need to unscrew the tip and replace it.

Cheers,
Richard

Good point Richard, I had a nozzle I'd damaged when trying to clean forgot all about that. (To shameful to admit :sad-face: )
John .

[Jim R]

Hi Barry
From what you describe and your photos I would say you have either a damaged needle or nozzle.
Take out the needle, lay it on a flat surface and gently roll it from side to side. Watch the tip. You should be able to notice any irregularities. Check the point under magnification. Visually check the nozzle for any faults - a crack or a burr. Replace the needle, push it fully forward into the nozzle but don't tighten the lock. Turn the needle with your fingers while maintaining gentle pressure into the nozzle. It should feel absolutely smooth.
I am sure you have already tried all the above. It sounds as if the fault is small and so very hard to see. I don't know if you are a member of a club or attend model shows but it may be worth taking the airbrush to let someone else try it.
Jim

[bazers]

Thanks for suggestions guys will wòrk my way through them .

[JR]

Thanks for suggestions guys will wòrk my way through them .

Barry .
It would be good to read the out come, might be helpful to someone else.

Good luck .
John .

[bazers]

Hi Barry
From what you describe and your photos I would say you have either a damaged needle or nozzle.
Take out the needle, lay it on a flat surface and gently roll it from side to side. Watch the tip. You should be able to notice any irregularities. Check the point under magnification. Visually check the nozzle for any faults - a crack or a burr. Replace the needle, push it fully forward into the nozzle but don't tighten the lock. Turn the needle with your fingers while maintaining gentle pressure into the nozzle. It should feel absolutely smooth.
I am sure you have already tried all the above. It sounds as if the fault is small and so very hard to see. I don't know if you are a member of a club or attend model shows but it may be worth taking the airbrush to let someone else try it.
Jim

Thanks Jim ,I have just stripped airbrush down and checked nozzle and it looks ok but will check your other ideas with needle eta, no clubs near me .
Just thinking back I was getting the same problems with my iawata neo that's why I bought the infinity,!!!.