Pneumatics

i am running a 10 bar lp co2 flipper in my featherweight and i need some help with wat bits i need to buy.firstly i can get my hands on a 1kg fire extinguisher but its a powder 1 would i be able to empty that and use it as my tank.and wat other components do i need to go between my rx,cylinder,tank

Josh, most people use a 600g black bottle as their main CO2 tank. I assume this is for the mini Turb. We have one which we can see to you for a small price, will have to check this with Dave as it is his really. Also If you email Dave or I with your current pnuematic ideas then we can help. It is not such a good idea to delve into this area with no guidence as it is dangerous.

Ed
Team Turbine

(Message edited by geeza on August 13, 2006)

A powder tank will be no good as your main tank, it would only be suitable for a buffer tank. For a basic system you will need;

CO2 Tank - Cost about £35, standard is a 600g bottle
Regulator - A modified welding regulator is normaly fine, but dont modify it yourself, get someone who has done it before.
PRD - safety valve thats lets the gas out if the pressure goes over a set amount, you should have a 1000psi one on the high pressure side aswell but these are now near impossible to get hold of
Valve - to control the flow of gas into ram cost anywhere from £40 upwards new
Ram/Cylinder - size/cost will depend on what power flip you want.
RC switch - such as an electronize switcher to fire the valve from your RX.

Check out;

http://howto.killerhurtz.co.uk/pneumatics.htmhttp://howto.killerhurtz.co.uk/pneumatics.htm

PRD isnt a problem....

FP, PRV- Ive got one mario built that im not using at the momment, if i can find it you can have it pretty cheap.

Ive also got an 11bar one. Also cheap.

Josh i would suggest the very basic of setups for your first system.

Ive got your ram - custom freebie
main bottle - if i can find it u can have it cheap.
regulator - paint ball regulators or welding regulators can be got cheap.
valve - buy a 3/2 valve (on, off, vent) from ebay.

fittings and pipe i always buy from technobots.

when and if you come to birmingham so james can weld up your chassis ill help plumb up your feather. Im helping a mate plumb up a very complex lp pneumatic setup for a double acting high flow hammer, so ill find out were he got his regulator from and let you know:)

he got it from me it seems

Yep its the paintball gun one from you, but it doesnt work! Keeps sending full pressure through the whole system :sad:
JB - is there any chance of sending waynes other regulator from Mario to us please? as he needs it asap.

no chance on earth.

well, if wayne sends me all the cash he promised to pay back, and in the next few days... maybe, but otherwise no way.

http://cgi.ebay.co.uk/NORGREN-CONTROL-VALVE-PILOT-SPRING-3-2-VALVE-1-4-BSP_W0QQitemZ130015938877QQihZ003QQcategoryZ48718Q QssPageNameZWDVWQQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/NORGREN-CONTRO...-1-4-BSP_W0QQi temZ130015938877QQihZ003QQcategoryZ48718QQssPageNa meZWDVWQQrdZ1QQcmdZViewItem

is this what i am looking for for my 3/2 valve?

NO.
It hasnt got a d.c. solenoid to activate it.

does anybody kno were else i can get a 3/2 valve other than ebay coz ive been keepin an eye on ebay and thas the only 1 thas bin on over the last week

You could use a 5 port in reverse to act like a 3 port. But you would need the good Mr Wood to explain how its done.

Or you can just block off the return port on the valve, we ran G3 like this for years.

This should be suitable Josh......although its perhaps a little big.

It might have 5 ports but as Alan said .....easily modified by blocking one.... rather than using my weird mod.

Dont forget to check the solenoid voltage with the vendor...also the physical size and weight.

http://cgi.ebay.co.uk/3-8-BEECH-VALVE_W0QQitemZ120021981641QQihZ002QQcategoryZ1267 QQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/3-8-BEECH-VALV...2QQcategoryZ12 67QQrdZ1QQcmdZViewItem



(Message edited by woody on August 19, 2006)

Another possibility.

http://cgi.ebay.co.uk/SOLENOID-VALVE-SMC-VT317_W0QQitemZ170019253618QQihZ007QQcategoryZ4871 8QQssPageNameZWDVWQQrdZ1QQcmdZViewItemhttp://cgi.ebay.co.uk/SOLENOID-VALVE...18QQihZ007QQca tegoryZ48718QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Again check the voltage etc.

Specs here ....... http://stevenengineering.com/Tech_Support/PDFs/70D3SVT317.pdfhttp://stevenengineering.com/Tech_Su...70D3SVT317.pdf

my team mate asked me a question today, and i dont know the answer for sure, any idea mario/woody?

on a small welding bottle (co2) like youd get from halfords, does the outlet valve do any kind of pressure restriction prior to the regulator?

I think (was fairly sure) no, but im not 100% sure. my team mate wishes to use a gas draw fire extinguisher filled from our robot co2 supply, instead of buying new welding co2 all the time, but is worried about putting the reg onto a fire extinguisher because he heard welding bottles have pre-regulator reduction, and doesnt want to damage his reg.

If woody/mario know either way, please let me know.

My names not woody or mario, But the valve on the top is just a pin valve like on a soda stream bottle, no regulation, just rubbish flowrate, if you take the stud out it looks like a normal BSP male/male 1/8th connector. with a pin in it.

If still in doubt- take one of the valves, hook it upto a bottle of co2 with a guage either side. turn the bottle on. Look at the pressures.

No pressure restriction .

Just stick the reg on the gas draw modded extinguisher.

Just to further put your mind at rest... the inlet pressure rating is 180 bar on a disposable type bottle reg.

http://www.tooled-up.com/Artwork/ProdZoom/SEAREGMMG.jpghttp://www.tooled-up.com/Artwork/ProdZoom/SEAREGMMG.jpg

many thanks

Note that these regulators have no pressure relief devices nor do the welding gas bottles.

thanks kane, thats a good point.
ill advise him.
it is intended fo use only as a welding bottle, but Im sure its only a matter of time before the subject comes up with us.
cheers

No problem.

Well, I will start to get my thread back now THANK YOU VERY MUCH! ;-) Anyhoo, I am getting back to work on the 30lb flipper. I am working with a friend, Bryan to CAD up the bot and do it right this time. Not all half ass like last time! But as is I will have about 7ish pounds left for the arm and armor. A picture is on the profile.... All waterjet and AL frame. The arm will be some sort of steel tube. Armor will probably end up being a sheet or two of paper :-)

ooooor I could post in my own thread! DOH! Sorry! :-)