Pneumatic

[woody]

Pneumatic

There will be loads of flow thru the buffer transfer ports and into the rams 60mm base port .... assuming that the simple valve works as envisaged.
Hopefully Ill get time to chat with you this afternoon / evening ( UK time )about the valve concept.

[wazio]

Pneumatic

Woops.. that would help. Here is a cut away with the vent holes addd.
http://www.putfile.com/pic.php?img=4665231http://www.putfile.com/pic.php?img=4665231

[wazio]

Pneumatic

All but for the Valve part I think it is done... Weight is about 8 pounds. . . Tiz 3/16, 1/4, and 3/8 walls... I am sure I can loose some weight but done wana take stuff away till I hear from the brains in here

http://www.putfile.com/pic.php?img=4671060http://www.putfile.com/pic.php?img=4671060

[maddox]

Pneumatic

Im ahead guys, the buffer/ram/top are only 2 parts, all ali.

The raw material is aquired.

This ram will look like a ali billet with a few holes in it....

[wazio]

Pneumatic

Hey Mario... Shoot me a mail, I am at the airport now going to see my little woman for the weekend in CA and will not be on the computer much if at all. Plus Sunday is the SuperBowl!!!
I wana get to work on the list for ya so I can start to get the parts. Chad-at-teamwazio-dot-com. Have a good weekend all!

[Mouldy]

Pneumatic

Chad im impressed. Keep up the good work. Out of interest what travel have you put onto the base piston? (I.E. How far does it have to travel from closed to fully open to fire the ram?)

[woody]

Pneumatic

An approx optimal clearance would be Radius x Radius of the base port divided by the Diameter of the base port.
This would give the same cross sectional area for flow... between the base piston and the port ... as the port orifice itself has.

[wazio]

Pneumatic

what woody said

[maddox]

Pneumatic

Idealy it would be 15 mm in Chads ram.
But the flow is rather huge, so Ill limit it to 8mm. Still gives the surface let trough of 12+ Burkert valves

[woody]

Pneumatic

You also get a fair bit of wasted co2 with a big clearance ....as all the gas under the valve is vented.
So as Mario pointed out there needs to be a sensible compromise between ultimate flow , required performance and gas consumption.

(Message edited by woody on February 05, 2007)

[wazio]

Pneumatic

Looking for a small 2/2 valve for this thing... Anybody has something that would be up to the task?

[woody]

Pneumatic

http://www.fas.ch/eCatFASBin/eCatFAS.dll/PrintENTCATALOGUE?ID_ENT_CAT=1105&ID_ENT_CAT_PUIS_ BOB=1063http://www.fas.ch/eCatFASBin/eCatFAS...CAT=1105&ID_EN T_CAT_PUIS_BOB=1063

[woody]

Pneumatic

http://www.fas.ch/eCatFASBin/eCatFAS.dll/PrintENTCATALOGUE?ID_ENT_CAT=1105&ID_ENT_CAT_PUIS_ BOB=1063http://www.fas.ch/eCatFASBin/eCatFAS...CAT=1105&ID_EN T_CAT_PUIS_BOB=1063

The valve is rated for 60 bar .. with an A.C. Coil ...youll need to overvolted a D.C. coil to operate it ..... perhaps the 6v option would be best.

[wazio]

Pneumatic

Got some work done on the ant today... Self rights and flips alot better with the new tube that I got. Still only at 90PSI when the max is 145PSI. New videos and pictures.
- http://www.teamwazio.com/bots/getflippen.phphttp://www.teamwazio.com/bots/getflippen.php

[philip_taylor]

Pneumatic

How would a Burkert 2200 or 2400 valve go for releasing the pressure from a 70 * 100 mm ram? Do you know the mass of these? I am having trouble finding a spec sheet in English.