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New Iwata DA spraying like a SA

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BDF
  • Member since
    May 2020
New Iwata DA spraying like a SA
Posted by BDF on Friday, May 29, 2020 3:11 PM

So I'm getting back into modeling after a 30 year hiatus.  Built a couple simple models that I gave to my son and have been working on better kits.  Anyway, I inherreted a few kits and tools from my late father including a cheap DA airbrush which I was fairly proficient at however, I dropped it (doh!)  So I decided to move up to a nice Iwata Eclipse.  First time using it every thing went fine, cleaned it up properly and put it to bed.  Come to use it subsequently it acts like SA with paint full on full (and I mean FULL.) I can't figure it out.  I literally haven't messed with the needle settings or anything.  As soon as I press down for air, boom, full paint flow.  No changes moving the trigger back.  

I'm waiting to hear back from Iwata but decided to throw this out there in hopes of someone encountering something similar and could suggest something until I hear back

Thanks!

  • Member since
    October 2008
  • From: Fullerton, Calif.
Posted by Don Wheeler on Monday, June 1, 2020 11:18 AM

If paint comes out as soon as you press the trigger, then the needle is not seated against the nozzle.  Look at the front end and see if that's the case.  If it is, loosen the needle chuck and reset the needle.

Don

https://sites.google.com/site/donsairbrushtips/home

A collection of airbrush tips and reviews

Also an Amazon E-book and paperback of tips.

  • Member since
    November 2008
  • From: Central Florida
Posted by plasticjunkie on Tuesday, June 2, 2020 4:17 PM

When you clean the ab and put it away the needle may either be stuck not seating properly or there's gunk in the tip area not letting the needle seat. It' s happened to me several times.

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

  • Member since
    March 2003
  • From: Virginia
Posted by Wingman_kz on Tuesday, June 2, 2020 4:31 PM
Pick up your brush, pull the trigger back and then forward. Watch to see if the little follower goes with it. If it stays back and doesn't follow the trigger forward then the needle is sticking in the needle seal/bearing. The seal is adjustable and sometimes may be a little snug. Then, if there is any residue on the needle or seal and it sets for a while it won't want to travel forward to seat. Enough gunk on it and the trigger may not want to move at all. It happens. If you use lube of some sort on the needle it may set up or become gummy and keep the needle from moving freely. If you back off the tension on the return spring for easier trigger movement it's even more likely to happen. Now, I'm not suggesting that someone not adjust the spring, not at all. Or that you have. I'm just saying it's more likely to happen. What I am saying is, lube the needle sparingly if you do. Get a set of brushes for cleaning airbrushes and from time to time, when you tear it down for cleaning, wet a brush small enough to fit into the passage the needle comes through and make a couple passes through the needle seal. I use lacquer thinner but use your cleaning solution of choice. I go as far as taking out the needle tube and trigger and insert a pipette in from the back to flush it out. The pipette should be able to reach past the air valve so you don't contaminate it and be gentle with the squeeze. If there just seems to be to much resistance when you insert the needle you can back off the needle seal a little. Something like a jeweler's screwdriver will work, just choose the right size. Barely moving it is all you need. Right hand threads so, turn left to loosen. Being a new brush, it just needs a little breaking in probably. But that seal could be a little too snug, it doesn't take much. If in the future it seems too loose, snug it up. Remember, it only has to move a hair.

            

  • Member since
    November 2018
Posted by oldermodelguy on Wednesday, June 3, 2020 5:48 AM

On that brush you physically need to pull out the needle and wipe it down in thinner, then it's also advisable to put on a lite coat of either their lube or glycerin or a lite film of bees wax. Put it back together. Some brushes you can get away with a couple good back flushes and a rinse after painting but not that one, nor it's knock offs either.

  • Member since
    November 2008
  • From: Central Florida
Posted by plasticjunkie on Wednesday, June 3, 2020 8:23 AM

oldermodelguy

On that brush you physically need to pull out the needle and wipe it down in thinner, then it's also advisable to put on a lite coat of either their lube or glycerin or a lite film of bees wax. Put it back together. Some brushes you can get away with a couple good back flushes and a rinse after painting but not that one, nor it's knock offs either.

 

That is an excellent practice to maintain efficiency. I wipe mine every time and even use 0000 steel wool to lightly buff the needle now and then.

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Wednesday, June 3, 2020 9:27 AM

oldermodelguy
On that brush you physically need to pull out the needle and wipe it down in thinner

And here I thought it was just me......

Also, back to the OP, on this 'is the needle seated or not' thing, it isn't that complicated. Release the trigger gently while observing the tip of the nozzle under magnification (or not, if you have good eyes). Look for the needle tip to appear and nest itself at the open tip of the nozzle. If it's not not seated right, you'll see it. It is just that simple.

Wearing my optivisor, that is the final step of my day-end airbrush cleaning. Every time. My airbrushes are always ready for the next session, be it the next morning or next year. Period.

-Greg

BDF
  • Member since
    May 2020
Posted by BDF on Friday, June 5, 2020 12:00 PM

Belated thanks to all.  It was indeed the needle set back a little bit that I just didn't catch after I cleaned it.  Caught it shortly after posting the OP.  Doh!  Spraying great now.  Now back to getting frusterated on having to wait for paint & materials I need for my currently build as I build up my supplies.  

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Friday, June 5, 2020 12:36 PM

BDF
It was indeed the needle set back a little bit that I just didn't catch after I cleaned it.

So easy to do.

BDF
Spraying great now.

And that's the main thing. Glad it's sorted out! Yes

It's always nice to hear the outcome of a posted problem, especially a good one. So thanks for taking the time to follow up.

-Greg

  • Member since
    March 2003
  • From: Virginia
Posted by Wingman_kz on Saturday, June 6, 2020 10:14 AM
Glad you got it going. When you slide the needle in and it's seated, give it a gentle twist before you tighten the chuck. As far as supplies, sometimes going directly to the source can help. Although, some of them are running out of inventory now. But, they will also be the first to restock...

            

  • Member since
    November 2018
Posted by oldermodelguy on Saturday, June 6, 2020 11:40 AM

That's great !!

Supplies here is an issue with UPS, I've been waiting on an item since two weeks ago Friday. Every day it says out for delivery then doesn't show. Next morning says something silly early on, some canned message about missed shipment, then about 10:30 it's listed again out for delivery. I'm three weeks in now from the date of purchase with Amazon Prime. And the tracking number says it's in my area. I actually think USPS might be a wiser shipping method right now in these times we are in.

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