Pneumatic Cylinders on ebay - any good?

[calumco]

i wouldn't say theres an average size, depends on the size of the robot and whether you'd use 2 etc

personally i'd just use the one thou because another rams just adding extra weight, ive got a 50mm bore ram in mine

do your pneumatics so that your buffer tanks piped as close to your valve as possible aswell

[limpet]

ok thanks.
I`ll soon have all the main bits so I can start building.

[limpet]

Looking at 5/2 valves, are the 1/4 ok? I was planning on 1/2 for best flow rate but they seem a fair bit bigger than ones I`ve seen people using. I thought 1/4 would be too restrictive?

[calumco]

i use 1/4 valves cause i can't get any bigger off the techno bots website lol but yeah they are ok

[limpet]

Thanks Calumco, now bought.

[calumco]

use 12mm pipe aswell from your buffer to the valve and from the valve to the cylinder if you can. you'll be surprised at the massive difference in power.

took a pic for you of some pneumatic stuff I've been playing about with for something i wana make - i know i haven't got a relief valve connected to the pipework but shhh lol

[attachment=0:2q2qzil4]BILD0002 (2).JPG[/attachment:2q2qzil4]

from the bottle its 8mm pipe then going up to 12mm for the buffer and the rest. its only 8mm pipe from the valve to the cylinder for now because i didn't have the right fittings lol

just from adding a buffer and using the larger dia pipe its changed the cylinder from acting like a lifter to jumping off the floor when i fire the valve

[mattsdragons]

post another pic once you have the prv in calum? ill save it as its good reference for a LP diagram thing

[calumco]

just tee off a section of the 8mm pipe before the pressure gauge and have it in there

normally when testing ill have all the pneumatics in the robot but swap the prv for a gauge so i can get the pressure set right then once it is, ill just swap the gauge back to the prv

[Laser]

Where do you get that bottle you are using for your main tank Calum?

[calumco]

the 2 smaller 600g black bottles that aren't connected to anything are from johnno

and the bottle i'm using in the pic is a 2kg bottle i bought off kenny ages ago

or did you mean the buffer? that's off grant cooper