Semi-Auto Action

[FreakyShotGlass]

I finally got round to making a semi-auto marble cannon on the weekend. At first I tried to use a paintball style blowforward design like this but it didn't work, tolerences required were to close and I don't have a lathe or access to pvc rod. So then I got thinking and came up with this design and it works perfectly.
Here is a little animation of the action that i made, some clearer 2D diagrams will come as soon as I install CS3.

It should be pretty obvious how it works and where the magazine should go.

[jackssmirkingrevenge]

essentially it's the same concept as the other design, just built differently - videos in action please!

[experament-u2]

So then I got thinking and came up with this design and it works perfectly.

have u made it if you have post a video or some picture
please

oh and what program did you use to do the rendering? bongo?

[FreakyShotGlass]

Ive made a gun with it but I left it at a mates house, I'm going to go get it tomorrow so I'll put some vids up then. I used 3DS Max for the render.

[Hotwired]

So how is this semi-auto?

It looks fully automatic to me, just needs a constant air supply and a constant paintball feed - which could have the feed port blocked off by the bolty thing moving forward.

[jackssmirkingrevenge]

It looks fully automatic to me, just needs a constant air supply and a constant paintball feed - which could have the feed port blocked off by the bolty thing moving forward.

that would take a lot of trial and error to get the spring tension correct enough for it to cycle continuously.

For semi-auto you need a separate valve to feed the air in pulses.

[noname]

That's a really good animation, wish I could so stuff like that. Basically, that's clide's semi auto paintball gun.

[to_live]

hmmm sorry but im a bit of a newb at stuff like this, could you possibly label it for me please?

[Jumpin Jehosaphat]

Ooh, I want to make one. Has anyone ever made a chart or list of all the different pipe specifications that can fit into one another?

[sandman]

look at the wiki, it has pipe stuff in there, but idk about pipe that fits into other pipe

[us sniper]

What type of valve are you using to control the flow of air. Does anyone know where I could get a 555 timer circuit. I think that this gun would be perfect hooked up to a bottle of co2. To control the fps of the paintball all you would need to do is change the tension on the spring

[keep_it_real]

How did you stop the balls from rolling out? Did you do something like clide's golf ball gun or something else. And I'm guessing your using a clip or a hopper.