Did I jack it up?

Johnny

Double Actioner
Master G233:

In my attempts to 'make it a better brush', in addition to all the mentioned tips, I clipped 2 rings off the air valve spring. I'm still getting plenty of air through the brush - but it will not deliver any product/paint unless I crank the pressure up to 50/60 psi. Also - it will not begin to deliver any product unless the trigger is nearly all the way back.

If it ain't broke don't fix it - right?

I see the price for the Iwata Medea? HP-CS Gravity jumps up and down, on Amazon, between 179 and 187.

Why do some ads insert the word Medea and some do not?

Medea, High Performance, etc...... What's the deal?

Also - Other than Amazon, who has a good return policy. Who do you guys like?
 
The air valve spring really has nothing to do with paint coming from the tip. You can remove the spring altogether, and aside from the air potentially staying on all the time, the brush will still function. There is a very good chance that air pressure would allow the valve to close as normal anyway... If the brush will now not draw paint forward, it is more likely that there is dirt (dried paint) in the nozzle, perhaps around the nozzle cap opening, or on the needle.

Medea is an importer for Iwata, and is often listed as part of the name. You will also see it written as Anest Iwata, as well as simply Iwata - all the same thing. Prices on Amazon are whatever a retailer feels they can get away with - I have seen some very outlandish prices on products before.

Iwata has a half dozen of more lines of brushes, starting with the Neo for Iwata, Revolution, Eclipse, High Performance, High Line, as well as Micron, or Custom Micron... there are more, but you get the gist. Each model goes up in price, as well as (in theory) potential performance.

There are several online retailers I enjoy dealing with. Merriartist and Coast Airbrush for Iwata product, Spraygunner for just about everything else - including Creos GSI brushes - you may also want to consider. They are the same quality, being made in the same factory, as Iwata, but at lower prices.
 
:eek:

why you done that? -.-


Also just for info, maybe you will find this usefull one day. You can get softer springs for your airbrush. :whistling:

Just a technical note- removing coils from a spring does not change the spring rate. The only way to change a springs rate (in practical terms) is to change the wire diameter, coil diameter, or the amount of coils per inch.
 
Just a technical note- removing coils from a spring does not change the spring rate. The only way to change a springs rate (in practical terms) is to change the wire diameter, coil diameter, or the amount of coils per inch.

This is interesting topic. I've always cut and stretched my springs which seemed to make a difference to me. Same with the spring in back, I cut that one too and it makes a huge difference.
 
This is interesting topic. I've always cut and stretched my springs which seemed to make a difference to me. Same with the spring in back, I cut that one too and it makes a huge difference.

So, what happened when you stretched the spring? You changed the amount of coils per inch, right?
 
So, what happened when you stretched the spring? You changed the amount of coils per inch, right?
***

Not a darn thing. Why is a spring even necessary there? The piston in the air valve supplies any downward and upward pressure - right? When depressed it's all air no matter what you do?

On another note, which I posted elsewhere. As I mentioned now the gun will not dispense paint and I cannot get the bubbles to stop.
 
So, what happened when you stretched the spring? You changed the amount of coils per inch, right?
I had to go take a look and see what exactly I was doing. So I cut the coils, and like you say it doesn't change the spring specs other than it decreases the pre-load on the parts. I only stretched the spring if I got a little carried away and there wasn't enough pre-load to either return the trigger up or forward. if that makes sense.
 
***

Not a darn thing. Why is a spring even necessary there? The piston in the air valve supplies any downward and upward pressure - right? When depressed it's all air no matter what you do?

On another note, which I posted elsewhere. As I mentioned now the gun will not dispense paint and I cannot get the bubbles to stop.


I missed "the bubbles to stop" part - this is the nozzle. It is either not tight, sealed, or has dirt blocking it, or it has unfortunately cracked. The other option is that the nozzle cap is not screwed down all the way...
 
Hey, the nice thing is, even if you FUBAR the brush, it didn't cost you much. You could replace it with another $30 brush. You could also choose to get a brush that doesn't require re-engineering for $60-$80 and still not break the bank. Bill Kennedy @wleonartistry just did a good review on an $80 Sparmax that looks really good.

 
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