Usign a 2-1/2 bore, 24" stroke pneumatic cylinder.

[gpetilli]

Originally Posted by BotDesigner

Hi all,

For scaling we are planning on using a single pneumatic cylinder to lift our bumpers above the low goal. We need a 24" stroke, but I am not sure what size bore to use. Assuming that we have the necessary air tank storage space, would a 2-1/2" bore be faster than a 2" bore? I have read on this thread ,http://www.chiefdelphi.com/forums/sh...light=cylinder, that increasing the bore size of the pneumatic, although it increases the strength, makes it slower because of the extra volume that must be filled by air traveling in 1/4" tubing. Does anyone here have experience with large pneumatic bore sizes?

You will need lots of storage tanks to move that cylinder in 20sec. We used two 2" and one 0.75" cylinders to climb a few years ago. The thing we learned and I will highly recommend to you is to use a single small cylinder to raise your hook and then then all three to lift the robot. You don't need/want to expend that much air to lift the hook. Other than that, we successfully climbed probably 90% of the time. Simple mechanism - if you have enough air.