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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 Oct 27, 2011 2:15 pm

Problem: that solenoid doesn´t work :(
cause: the solenoid hammer has too little travel distance, less than 2cm and I need about 2.5 cm for the valve to operate correctly :roll:
Pneumatic cylinder are too expensive and big, anybody have alternative for me? thanks
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Unread postAuthor: Goats spudz » Thu Oct 27, 2011 3:28 pm

make your own coil with ajustable ROF not sure if my circuit is correct but you get the idea. :D
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Unread postAuthor: wyz2285 » Thu Oct 27, 2011 4:04 pm

I have thought about making my own coil, but considering with the battery I'm going to use it has to be made with very thin coil, with the size of the coil in mind it would be a hell of work to make a proper one. I'm now try to see if it's possible make a serviceable hammer for the solenoid. Thx for the circuit btw, even though I don't know if it works, but it's a start point at least :)
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Unread postAuthor: Goats spudz » Thu Oct 27, 2011 8:08 pm

could you wrap insulated copper wire or magnet-wire around a reel thats used for holding thread for sewing and discharge a capacitor through it like a coilgun but instead of using the coil gun to shoot projectiles, shoot a rod into the hammer like a solenoid


http://en.wikipedia.org/wiki/Coilgun
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Unread postAuthor: jackssmirkingrevenge » Thu Oct 27, 2011 11:21 pm

wyz2285 wrote:Problem: that solenoid doesn´t work :(
cause: the solenoid hammer has too little travel distance, less than 2cm and I need about 2.5 cm for the valve to operate correctly :roll:


I though the idea was that the solenoid hits a hammer that is not actually attached to it?
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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 2:26 am

I thought about the idea of "shot" the hammer, and it would work, but charge capacitor is difficult, I can't get a transformer that doesn't burns out quick.
Jack if the hammer is float, I need a low friction travel base to hold the hammer, but even if the friction is really low, the small amount of power the solenoid gives (0.8 N) still going to be wast quite a lot
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Unread postAuthor: jackssmirkingrevenge » Fri Oct 28, 2011 2:29 am

Image

Travel can be mechanically amplified...
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Unread postAuthor: POLAND_SPUD » Fri Oct 28, 2011 2:58 am

Travel can be mechanically amplified
naaah just get a real solenoid that can do some work

found one in an old electronic typewriter (thought it was a printer as I got it partially disassembled)...
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Unread postAuthor: jackssmirkingrevenge » Fri Oct 28, 2011 3:18 am

POLAND_SPUD wrote:naaah just get a real solenoid that can do some work


Pascal thinks that is boring :P
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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 3:54 am

Oh well :roll: I still need +-0.6 N to open the valve, I better start looking a serviceable solenoid, or buy a stronger battery, so the hammer has enough energy to operate the valve without extra travel distance.
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Unread postAuthor: Crna Legija » Fri Oct 28, 2011 4:12 am

i still think a motor with eccentric cam driving the hammer would be much simpler.
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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 7:47 am

It would be much easier, but semi auto operation is quite difficult to achieve, even through full auto and burst fire is very easy :p I meant give it a try
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Unread postAuthor: Crna Legija » Fri Oct 28, 2011 8:21 am

yeah that true.
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Unread postAuthor: Goats spudz » Fri Oct 28, 2011 8:34 am

jackhammer? you should buy a cylinder on ebay
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Unread postAuthor: wyz2285 » Fri Oct 28, 2011 11:17 am

50£ for one cylinder :evil: and I will have to buy a electric 3-way to actuate it too
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