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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: Goats spudz » Fri Oct 28, 2011 11:51 am

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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 12:14 pm

hum... interesting stuff
Are these cylinders operates as fast as a solenoid? anyway that 3-way is a cool thing to buy :roll: gonna ask my dad for more money :D
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Unread postAuthor: pneumaticcannons » Fri Oct 28, 2011 3:08 pm

wow im just finding this post know... :oops: what about a aeg pistol? I've seen cheapo models in the states for $40. You would get a nice grip too. Im just wondering if that would be over kill though as it is just functioning as a hammer lol.
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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 3:51 pm

No problem, feel free to share your idea anytime :wink:
A AEG pistol is a little overkill to be used as hammer, I have thought about it. Have in consideration of the price, even through it would come with a already made electronic selection fire. Specially here where I live is extremely strict about realistic bb guns, buy it from ebay it's impossible, buy one from store will cost me 87euro, too much to dismount it.
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Last edited by wyz2285 on Tue Nov 01, 2011 7:27 am, edited 1 time in total.
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Unread postAuthor: Goats spudz » Fri Oct 28, 2011 5:09 pm

where do you live because then we can find some friendly suppliers
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Unread postAuthor: al-xg » Fri Oct 28, 2011 5:37 pm

How about you go about this differently and only use the solenoid as a release mechanism for a more classic spring powered hammer using blow back to re-cock ?
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Unread postAuthor: wyz2285 » Sat Oct 29, 2011 4:20 am

I live in Portugal, practically the worst place a spuder can be.
I spent last night thinking about using air to blow back a spring hammer, for this valve is very easy, I only have to drill a port in the back of the valve stem. But can't give me selection fire, witch is my main goal of this project, only full auto, as I can't figure out a trigger mechanism for semi auto.
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Unread postAuthor: pneumaticcannons » Sat Oct 29, 2011 4:25 am

-No-

thailand is the worst :D

personally, I think the blowback thing would defeat the purpose of the valve you have created. What happened to the solenoid that you said you ordered? did it work?
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Unread postAuthor: wyz2285 » Sat Oct 29, 2011 4:37 am

The problem is that solenoid isn´t working as good as I hoped, the metal core of the solenoid only alows 2 cm of travel distance, the valve needs at least 1.5cm lifting only 0.5 cm for the hammer to accelerate before hit the valve :( right now I my try to make a longer core for the solenoid
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Unread postAuthor: al-xg » Sat Oct 29, 2011 5:09 am

personally, I think the blowback thing would defeat the purpose of the valve you have created.


Technically his design is allready somewhat blow back operated.



Select fire with a solenoid operated sear would be pretty easy to acheive.

As far as semi-auto is concerned nearly all blowback powered airguns/paintball guns/... would run full auto if it wasn't for the trigger group design. Have you had a look at the ZDSPB.com marker animations ?
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Unread postAuthor: wyz2285 » Sat Oct 29, 2011 5:15 am

Yes I have looked some paintball animations, some of them are quite neat design, but make those trigger with precision with the tools that I have is difficult.
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Unread postAuthor: wyz2285 » Tue Nov 01, 2011 7:26 am

After a small modification of the valve´s spring, the solenoid+valve is working :D
So I ordered this, it´s a NE555 timer chip.
After a short reading about 555 timer chips, I´m not able to come up with a circuit for semi/auto (a 3 shot burst fire if possible :roll: ). So if somebody have already done this, help is very appreciated :)
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 01, 2011 7:44 am

wyz2285 wrote:After a small modification of the valve´s spring, the solenoid+valve is working :D


video!
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Unread postAuthor: wyz2285 » Tue Nov 01, 2011 8:10 am

Jack can't you wait until it's more presentable? It's quite ghetto now, and I only put well made products on my youtube channel :wink:
Right now just a 12v dc input to the solenoid, when turn it on, opens the valve, when turned off, the valve closes, smooth action
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Unread postAuthor: jackssmirkingrevenge » Tue Nov 01, 2011 8:15 am

wyz2285 wrote:Right now just a 12v dc input to the solenoid, when turn it on, opens the valve, when turned off, the valve closes, smooth action


That sounds presentable enough ;)
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