It sputters no matter what i do to the trigger.[V]
Richard,
Remove the head of the airbrush and shoot air through it and see if it sputters.
Mike
It shoots air exactly like it did when it was new head off and on it just sputters when i run anything through it.[V][banghead]
I am beginning to think it is the packing nut or washer which is parts #8 and 9 in the diagram below.
On page 3 of this link it tells you how to tighten the packing nut in step “F”
http://pmhansen.com/Information/VVJRVLVLS.pdf
Mike
Everything is tight i took it out then put it back in the problem continues, could either one the nut or the washer be faulty i havent realy used it much just on models so i cant see anything realy going bad yet but thats not to say it cant happen i appreciate all the trouble shooting i wouldnt know this much without your help. if you have any new ideas im all ears thanks in advance Rich[8D]
So with just air coming out, the airstream is steady with no sputtering, but with any liquid it sputters as it exits the airbrush correct?
You described it as “spitting” in one post and “sputtering” in another, so I am wondering if you mean it just skips the line you are shooting, or that it spits bigger particles out onto the surface?
Mike
It started out as spitting (leaveing bumps on the aircrafts paintjob) thats what prompted me to clean the brush in the first place i usually keep it like new as far as cleaning goes the brush is treated like royalty. After i broke it down and cleaned it more thorouhly it started sputtering sort of a spraaaaaaaaay spray spraaaaaaaaaaay if that makes any sence there is a break in the strem of liquid that passes through the brush that isnt there when it just sprays air.
Rich,
A couple more questions:
What tip and needle are you using?
Is it the #1 (fine) set?
Do you have a #3 (med) set that you could try instead?
Mike
Im useing the tinyest set i have right now but i will go through and try everything in my arsenal if you think it will help! I shall return.[:D]
The reason I ask is because the #1 tip and needle can be picky about what paints will go through them reliably. The #3 would be a better choice.
Mike
It sprays better but only because it has a steadier pulse it would coat better but it still pulses i would be takeing a chance by useing it.[banghead][%-)][|(]
Rich,
Did you strain your paint first?
I am wondering if clumps are causing this.
Try 3 parts Model Master enamel to 2 parts thinner and strain it through a piece of women’s nylons to remove any particles.
This may sound dumb but it has happend more than once, you do have the aircap cover off of the airbrush correct?
Since they have a hole in them I have seen people leave them on when airbrushing not knowing that you have to remove them. [;)]
Also, you never said what pressure you are spraying at did you?
Mike
Its funny you should mention the cap i was just thinking that for another problem in this forum how funny. There is no preasure guage on my compressor so i really dont know. I have never strained my paint thats a cool idea but it pulses when i run water and straight thinner (or a mix of both) so thats not it. I am useing a compressor made by paasche specificly for this airbrush im at a loss i dont know what started this and its hindering my progress on another aircraft im starting to pull my hair out.[:(!][V][banghead]
Rich,
Is this the first time it has ever pulsed air like this?
I am wondering if your compressor is the culprit now.
The diaphragm compressors like the Paasche D500 will pulsate when new so if it is getting old it may not be putting out enough air pressure.
Is there another compressor that you can borrow to see if that is the problem?
Mike
Im starting to think you might be right ill see about another compressor im sure one of my neighbors has one. What would cause it to go bad all of a sudden especially when it does not get used all that often?Besides i think we have exhausted all other avenues with the brush itself i have taken it apart and put it back together now 12 times. Im starting to think its not the brush. Ill get back to you sometime tomarrow with the verdict. I cant thank you enough for your time and patience, Thank you so much![:D][8D][bow] It never pulsated before that i can remember but there have been times that i have had it wide open when shutting it down, but when i turned it back on not remembering it was wide open it struggled hard to run until i released the valve could this be the cause?[B)][xx(][?]
Rich,
It’s hard to say but diaphragm compressors get hot easily and sometimes have problems.
I wish you lived closer as I have three compressors here that we could try out. [;)]
It was my pleasure helping out where I could. I enjoy talking airbrushes in case you couldn’t tell. [:D]
Mike
Well you seem to be the expert here and you definitely know what you are talking about! ill see what happends with another compressor and i will certainly get back to you. ill talk to you soon thanks again for the help.[:D]