Posted 15 April 2012 - 02:35 AM
also, while i'm soliciting advice, does anybody have a reliable, compact, and studless pneaumatic auto valve? i've already tried building sofo's version, but it does not work. again, any ideas?
much appreciated, Saberwing40k
Rumble is Red,Frenzy is Blue,
On Decepticon Cypertron,
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My current project: ETF HTX-380, on Brickshelf, and Eurobricks.
Posted 15 April 2012 - 02:45 AM
As for the pneumatic auto valve, Seriel has a great design. I can't remember his website off the top of my head, but you might be able to find a link to it somewhere in the forum.
Here is a 3 valve design I used on my tractor:
Sorry the picture isn't very clear, but it's fairly compact and uses clutch gears to keep the motor from stalling once the valves have hit their limit.
Posted 15 April 2012 - 05:54 PM
You know how you can actuate a linear actuator by two ways: spinning the axle in the center and keeping the barrel straight, and vice versa. The only way i can think of getting a linear actuator back to center without the axle in the center moving, is to put a new-style technic turntable around the bottom mounting point of the barrel (be sure to mount on the half with the gear teeth) and then, you can have the bottom axle powered by a medium motor, and the turntable too. This us how it will work:
1.) the medium motor powering the LA axle starts spinning, and reaches the maximum extension point.
2.) the medium motor powering the axle stops, and the turntable motor starts rotating the turntable, which holds the linear actuator barrel.
3.) the medium motor powering the turntable goes down and stops.
4.) you are back where you started.
I don't know exactly how you can make this automatic, but you can make some type of NXT trigger or sensor which alerts another motor to turn a switch and that switch would power the other motor....
I hope that helps you for the returning actuator siduation. Good luck!
As for the pneumatic auto valve, there are many different solutions for this...I just use the hockey stick shooter piece (aka the return to center block) and I put that on the pneumatic switch and I use a m-motor to turn that...
Posted 15 April 2012 - 06:56 PM
I gave it a bit of thought, this should work:
Let me know if you don't understand ;)
Posted 15 April 2012 - 08:32 PM
Posted 16 April 2012 - 01:07 AM
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