For Every Airbrush Artist!

Ready to get involved? Register for free and you won't see any google advertising!

Register

My needle test

Discussion in 'Airbrushes' started by Than, Nov 2, 2019.


  1. Than

    Than Young Tutorling

    Joined:
    Jul 28, 2019
    Messages:
    35
    Likes Received:
    19
    Trophy Points:
    6
    Location:
    Thailand
    Today I try to compare new and old h&s needle again. Both are 0.4 mm. New needle has less cogging but It’s more delay than old. I use same color and air pressure. May I miss something or my less skill?

    59E1717A-4618-47BA-81F1-0CA77BBB3426.jpeg
    doc1 likes this.
  2. jagardn

    jagardn Airbrush Acquisition Disorder Patient Elite Member!

    Joined:
    Jan 4, 2013
    Messages:
    3,090
    Likes Received:
    2,590
    Trophy Points:
    126
    Location:
    Sarasota FL
    Any delays I’ve ever seen with H&S brushes is that the trigger is not all the way forward when the needle chuck is tightened.

    After re-assembly, look directly at the needle/nozzle junction. Any movement of the trigger should immediately move the needle back.
    jord001 and doc1 like this.
  3. Than

    Than Young Tutorling

    Joined:
    Jul 28, 2019
    Messages:
    35
    Likes Received:
    19
    Trophy Points:
    6
    Location:
    Thailand
    I don't think so because trigger delay doesn't happen when i use 0.2 mm needle
  4. jagardn

    jagardn Airbrush Acquisition Disorder Patient Elite Member!

    Joined:
    Jan 4, 2013
    Messages:
    3,090
    Likes Received:
    2,590
    Trophy Points:
    126
    Location:
    Sarasota FL
    I don’t have the new needle, so can’t really speak for it.

    Did you happen to polish your original needle? Just stabbing in the dark.
  5. Than

    Than Young Tutorling

    Joined:
    Jul 28, 2019
    Messages:
    35
    Likes Received:
    19
    Trophy Points:
    6
    Location:
    Thailand
    No, I didn’t polish any needles.
  6. DaveG

    DaveG Detail Decepticon! Very Likeable!

    Joined:
    Jan 2, 2017
    Messages:
    1,872
    Likes Received:
    3,372
    Trophy Points:
    111
    Location:
    West Virginia
    I will get my H&S out, and do some work with the .4 in the next day or so... With that said, here are a few photo's of some other needle tests that I did that represent what I see when switching from the original needle, to the V2 in the infinity - yes, I know they are different brushes in the photo's, but the results are typical -

    This first picture is typical of how I start - I turn my air pressure way down, and try my lines - I turn pressure up about 5psi at a time, and test - examining my results. Generally, results start out crappy, get good when I hit the air pressure that the combination likes, and then get crappy again as I continue to increase air pressure.

    line test1.jpg
    This second picture is about spot on with the results I see when I change needles from original to V2 in the Infinity. The left hand lines are with the old needle - Once I initiate my line, I just keep drawing the line till tip dry chokes off paint flow. Switch needle to the V2, same paint, same air pressure - initiate line and draw till tip dry chokes off paint flow. You can see I am getting about 3 or 4x the amount of line prior to dry tip build up... If I occasionally pick the tip before the paint stops, I never really have to completely stop to clean the needle.
    line test2.jpg
    Last edited: Nov 2, 2019
    MarcosD, doc1 and SiRoxx like this.
  7. Than

    Than Young Tutorling

    Joined:
    Jul 28, 2019
    Messages:
    35
    Likes Received:
    19
    Trophy Points:
    6
    Location:
    Thailand
    Are your nozzle H&S?
  8. DaveG

    DaveG Detail Decepticon! Very Likeable!

    Joined:
    Jan 2, 2017
    Messages:
    1,872
    Likes Received:
    3,372
    Trophy Points:
    111
    Location:
    West Virginia
    The photo's used previously were just to give a visual representation to what I wrote - I just did this with one of my H&S Infinity's with a .4 needle/nozzle set up using the v2 needle. Never cleaned the needle during this quick session -
    line-test-.4_1.jpg

    I did the same as I described previously - I used the MAC valve on my hose to just about close off air flow. I tested, then opened it up a little, and tested again, until I went past where I got the best line. I then backed off the MAC valve a little (reduced pressure) to bring it back into the sweet spot.
    MarcosD, Than, jagardn and 1 other person like this.
  9. jagardn

    jagardn Airbrush Acquisition Disorder Patient Elite Member!

    Joined:
    Jan 4, 2013
    Messages:
    3,090
    Likes Received:
    2,590
    Trophy Points:
    126
    Location:
    Sarasota FL
    This reminds me of how fine the lines are from the .4mm.
    Pretty amazing.
    doc1 and DaveG like this.
  10. DaveG

    DaveG Detail Decepticon! Very Likeable!

    Joined:
    Jan 2, 2017
    Messages:
    1,872
    Likes Received:
    3,372
    Trophy Points:
    111
    Location:
    West Virginia
    For sure, the .4 is a competent set up - it just opens up kinda quick compared to the smaller sizes, so it takes some finesse :thumbsup:
    MarcosD and jagardn like this.
  11. Than

    Than Young Tutorling

    Joined:
    Jul 28, 2019
    Messages:
    35
    Likes Received:
    19
    Trophy Points:
    6
    Location:
    Thailand
    I may know the cause of this problem. I use lacquer paint for model. The first time I tried it. I used spray paint color. (I drill a color can and thin color before use with AB ) because it’s cheap. Maybe a large pigments of spray paint color don’t suite with 0.4 v2 needle. Then I try to use mr.color(gunze). It’s better! but the old needle still easier than new needle.
    I’d better go back to using the old needle.
  12. DaveG

    DaveG Detail Decepticon! Very Likeable!

    Joined:
    Jan 2, 2017
    Messages:
    1,872
    Likes Received:
    3,372
    Trophy Points:
    111
    Location:
    West Virginia
    You use what works best for you - you will figure it all out. As far as the V2, it is simply a better design than the original, and offers it's benefits. Not everyone will get along with it - just like not everyone gets along with the H&S altogether vs., say an Iwata. Some people prefer the Badger over the Iwata etc... If you have it all working for you, that is all that matters.
    doc1 and Than like this.
  13. ashwind

    ashwind Double Actioner

    Joined:
    Nov 4, 2019
    Messages:
    34
    Likes Received:
    33
    Trophy Points:
    16
    I enlarged my nozzle slightly so that the needle protrude more so that the paint needs to "travel" further and thus making it open slower and overall gives me better control. The most notable drawback is I get more dry tip :D


    20191104_105805.jpg
  14. DaveG

    DaveG Detail Decepticon! Very Likeable!

    Joined:
    Jan 2, 2017
    Messages:
    1,872
    Likes Received:
    3,372
    Trophy Points:
    111
    Location:
    West Virginia
    Yeah, "enlarging" a nozzle is a brave move, as they will crack far more often than not, unless annealed- which will hurt your longevity... If you picked up dry tip, well, you negated one of the benefits of the v2 needle. I would simply drop down to the .2 and go to work ;).
  15. ashwind

    ashwind Double Actioner

    Joined:
    Nov 4, 2019
    Messages:
    34
    Likes Received:
    33
    Trophy Points:
    16
    I experience similar issues as well (0.2mm). For example, my pre-thinned Mr. Color works better with my old needle. Then I thicken the paint, it works great on the new needle but not so well with the old needle anymore. I generally had to rework my paint thinning ratio for the new v2 needle. Some paints had to be thicken, some had to be thinned further. We Modelers tend to use many different brands of paint and they are not the same.
    DaveG and Than like this.
  16. ashwind

    ashwind Double Actioner

    Joined:
    Nov 4, 2019
    Messages:
    34
    Likes Received:
    33
    Trophy Points:
    16
    I know, I definitely wont recommend doing this. I have extra nozzle/needle sets and was feeling adventurous (fully expecting to break it... but it didn't :D). I did it very slowly and carefully with a tiny drill, with metal polish and lots of luck.

    The reason I use the 0.4 instead of a 0.2 is that the finest line the 0.4 can produce is close to the 0.2 but it can spray much wider and take all sorts of metallic paints I use to paint models.
    Than likes this.

Share This Page