here in this Forum we have got some kind of thread dedicated to pneumatic cylinder lubrication. Unfortunately for you it is in German language.
There you find the lubricant recommended to be
And of course, very sparse application is recommended.Paraffinum perliquidum
Well, that is really fine to hear. Instead of having the piston now pushing out the pressurized air of the other side you get it moving against ambient pressure (and some back pressure because some air still needs to move out for the piston) you now get maximum force. The way back is naturally different. The old (blue) cylinders lack some sealing gasket on the piston shaft. This is where always the air escapes to ambient ... pfffft. And this is where you loose pressure. I think you wrote something about new (black) cylinders where you removed this gasket? Anyway. The gasket on the cylinder head (where the shaft comes out) cause friction losses and thus slower speed. The highest piston speed you receive from high air pressure and leastmost friction losses. Oh, and by the way, I thought up to now that your cylinder starts the ball into the game. But now I see that the cylinders push the levers. Did you check that there is some gap between the levers and the base plate? The hinges also are with leastmnost friction?rubem hat geschrieben: ↑22 Jun 2021, 15:10@Harry, I experimented with the setup you suggested (thanks for the idea!), using a separate switch for the second valve. You are right, the forward movement is much faster if the valve are not operated simultaneously. It works well if switch 1 is pressed for a very short time, but the speed to move the piston back is much slower after pressing it around one second or more. It this case it generates an audible "pfffft". It seems more pressure builds up while valve 1 is open.
The ball mass should be similar to those of ft. Basically they take the same diameter and material. It is just the speed (or better impulse (from momentum and conservation of momentum)) the ball receives.
Just some experimental and fixed "valve 1 open" time, some delay and then the "valve 2 open" time should do. A Reed-Switch might be too much here.
Continuar a experimentar
PS: One thing I almost forgot. With your setup there is minimum to no pressurized air reservoir. Without sufficient storage capacity the pistons move at the rate the compressor pumps the volume. This is quite slow. Maybe you can convert some enmpty plastic bottle or something else into an "air tank". Something like on this picture https://ftcommunity.de/bilderpool/veran ... -27/39114/