Some simple pneumatic questions

[supernova]

Some simple pneumatic questions

I only got it working on sunday! Didnt think i could fire the ball valve fast enough with the actuator ram i have, but it seems to work ok. Wont know if its going to lift anything untill i put some weight at the end of the arm. That will be this weekend

And the u tube video isnt that good, The arm its actually moves faster. Couldnt work on the robot in the garage as the builders were round, got kicked out the kitchen so the living room was the only other option!

[blazerbotics]

Some simple pneumatic questions

You could of tried flipper one of the armchairs!

[widow_twanky]

Some simple pneumatic questions

Can anyone explain to me the difference between magnetic or non-magnetic cylinders (apart from the obvious)?

[maddox]

Some simple pneumatic questions

Simple, if youre talking about aluminium , bronze or stainless steel bodied cylinders, the magnetic part is a ring around the piston, between the sealings, that makes it possible to detect the position of the ram with a simple reedcontact on the cylinders body.

Otherwise youre talking about lineair electromagnetic accelerators, and thats an entire other story.

[widow_twanky]

Some simple pneumatic questions

Thanks Mario.

Just one more thing. If I were to use a 1/2 2/2 valve (Burket or similar) on the upward stroke of the cylinder can I just fit a quick exhaust valve on the cylinder. I recall Woody mentioning that this wasnt desirable but at the time we were talking about using a 5/2 valve.

I suppose the alternative is to keep the 5/2 valve in place and tee it into the feed making its primary function an exhaust.

Andy

Andy

[woody]

Some simple pneumatic questions

Andy,
Working on the assumption that you need a flow increase ...Id probably recommend a 2/2 valve with a flow rating suited to your setup on the extend side of the ram ... combined with a small 1/8 port 5/2 and a self relieving regulator + QEV Exhaust on the retract.

Note that the 2/2 Burkert valve hasnt an exceptional flow rating.

Some data on your setup ... bore , stroke ,flipper tip lift and working pressure would help with a recommendation.

Woody

[Mouldy]

Some simple pneumatic questions

In the original turbulence when it was first built we put a burket on the fire.. it was pants.. wouldnt even selfwright.

We changed to a variation of woodys Q.E.V firing idea and it turned it from a rubbish lifter to quite a competitive flipper.

[glen]

Some simple pneumatic questions

out of curiosity whats involved in converting a hydraulic ram to operate as a full pressure pnuematic ram?

any internal mods or just enlarging the ports in the ram itself?

cheers

[woody]

Some simple pneumatic questions

Not a total answer to your questions but worth a read.

http://www.fightingrobots.co.uk/discus/messages/9/845.htmlhttp://www.fightingrobots.co.uk/disc...ges/9/845.html

[glen]

Some simple pneumatic questions

Cheers woody,

ive stripped the ram down and found its 5mm wall thickness steel and the piston itself is actually using a metal seal on it like a piston ring.

its next to impossible to move the piston by hand. is it okay to replace the metal ring with an o ring seal to lower the resistance?

thanks again.

[woody]

Some simple pneumatic questions

Replacing the piston seal with an O ring should be fine....Id go for a very light fit.