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solenoid to pilot a hammer valve

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: wyz2285 » Thu Nov 03, 2011 4:32 pm

I have tested the valve, it is balanced, but from my early test, open the valve it's extremely easy, and respondes pretty well to the solenoid :wink:
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Unread postAuthor: mobile chernobyl » Thu Nov 03, 2011 5:59 pm

Wow! Just saw opened this thread today, and it reminded me of a study on paintball concepts I was working with someone a long time ago.

Before I ever got into "advanced" spud stuff I use to collaborate with custom marker makers over at pbnation.com to come up with crazy and new ideas for marker internals....

This exact idea was an iteration of a design we came up with a while back - 6 years ago. I sourced out the "pancake" solenoid, did all the power calculations and everything - it turned out to be nowhere near worth it compared to a normal air operation.

Here's a pic of the idea back then - before I had any advanced 3D cad knowledge. The baby blue portion on the back of the gun is the pancake solenoid. It required about 9V and a few amps to generate the same force as the more commonly used weighted pneumatic cylinder. There was another draw back - Duty cycle - it was no where near capable of performing with the fast acting air cylinders. So you could maybe squeeze a string of 20BPS out but it wouldn't hold that for a while without overheating and/or killing the batteries quick - which were even the higher capacity li-po batteries.

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Unread postAuthor: wyz2285 » Sat Nov 05, 2011 9:30 am

I always thought a paintball gun doesn´t need to be moded at all, there are a lot designers who have probably already calculated everything :lol:
Anyway, I did a quick GGDT about this valve with 400 and 800 psi, with 0.25g airsoft bb, 400 psi I may get 800 ft/s, while 800 psi will go up to 1100ft/s :twisted:
I really hope the finished gun can do that.
So I went to a online paintball store where I use to buy my parts. I was looking for air regulators. There are 3000 to 400 psi ones and 3000 to 800 ones. My question is the 3000 to 400 ones can be regulated to 3000 to 800 ? If it could, it´s a lot better choice than the 3000 to 800 ones, as I can use the gun in low power and high power for different proposes. Thanks
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Unread postAuthor: dewey-1 » Tue Nov 08, 2011 1:08 pm

wyz;

I updated schematic per your request and will e-mail it to you.
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Unread postAuthor: wyz2285 » Tue Nov 08, 2011 2:55 pm

Thank you so much! :)
I changed the values of the YENKA model and made a simulation, all worked :)
can´t wait to make the real thing.
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Unread postAuthor: POLAND_SPUD » Wed Nov 09, 2011 2:24 am

I changed the values of the YENKA model and made a simulation, all worked Smile
can´t wait to make the real thing
Make the real thing (the timing circuit) and then get a solenoid valve :)
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Unread postAuthor: wyz2285 » Wed Nov 16, 2011 9:53 am

Hi everybody.
During last two weeks I have been testing and adjusting the solenoid+valve system. It wasn't reliable at all, sometime open sometimes doesn't. Apparently jack was right about the hammer issue, the solenoid has a great holding power when fully opened, almost enough to activate a blowgun. But if I put little weight on it before it's activated, it won't move. After checking the black bird airgun valve, looks like that valve needs much less travel space to open. So I actually only need the valve to block the feeding of bb from the magazine, half of the bb's diameter will be enough to do that. I will make the valve more sensitive to the solenoid, probably only 0.4 cm to open, but if somebody have constructive opinion, feel free to share. I will post some picture about the solenoid.
Btw dewey-1, the solenoid's resistance it's 15.5 ohm
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Unread postAuthor: dewey-1 » Wed Nov 16, 2011 1:34 pm

Is this how the solenoid is actuation the hammer valve?
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Unread postAuthor: wyz2285 » Wed Nov 16, 2011 2:24 pm

Well yes that's my basic idea, but the finished system will be quite different, as I will change the valve, also adding weight on the solenoid.
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Unread postAuthor: jackssmirkingrevenge » Fri Nov 18, 2011 1:05 am

wyz2285 wrote:Apparently jack was right


:shock:

:D
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Unread postAuthor: wyz2285 » Fri Nov 18, 2011 3:07 am

Oh btw for who wants a demo video, I will show it this weekend. As I haven't find a right size spring, the valve is only able of one shot.
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Unread postAuthor: Goats spudz » Fri Nov 18, 2011 12:01 pm

make your own spring!
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Unread postAuthor: wyz2285 » Fri Nov 18, 2011 3:38 pm

I´m making my own spring, but it´s really difficult to find the right wire and shape it right too. The solenoid doesn´t left any tolerance for mistakes :wink:
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Unread postAuthor: Goats spudz » Fri Nov 18, 2011 6:10 pm

guitar string wire and a drill to spool it on and harden and temper it :P
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Unread postAuthor: wyz2285 » Fri Nov 18, 2011 7:14 pm

Didn't know this way of making a spring :p looks simple and as almost all my friends play guitar I should find a nice string. So after the heating process it stays in a definitive spring shape? What's the temperature needed for that?
Got a spring now, a picture of the prototype. As soon as the epoxy cures, I will up load a video.
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