Doubt in pneumatics

I would like to answer another question I have and I would like to see if you can solve it for me.

The doubt I have is on the subject of pneumatics, I have seen teams that use double-acting pistons and only use the one that is to leave and the one that is to return use a rubber band, here what I would like to know is how they configure it, if they continue to use double-action selenoid or change it for a single-action one, And since they program it because I’ve already tried it and when I want to make it come back the piston doesn’t come back, that would be my doubt that I have.

Without further ado, I bid you farewell and send you my cordial greeting.

A single acting air cylinder has a spring inside which causes the air cylinder to automatically retract when the pressure is removed.

A double acting cylinder does not have an internal spring, so normally air pressure is applied both to extend and retract the air cylinder. To save air, many teams will use air pressure to extend the cylinder, and use an external band to retract the air cylinder. An advantage of using a double acting air cylinder in this way is you can choose whether the rubber band extends the air cylinder or retracts the air cylinder. The unused port on the double acting air cylinder should be left open, and the unused port on the solenoid it should be plugged.

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If your having trouble programming it, could I see your code? Also if you are having trouble powering one look at this video for help https://www.youtube.com/watch?v=jdsBtRKlf7k. This goes over the new pnematics kit and how to power and pump it . Using the old pnematics kit your experience will be similar (pressure goes out a and b and in P). If you have any more questions feel free to ask them here.

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Hello good day, I have a doubt since I tried to do what you tell me but at the moment the air comes out, all the air that is in the cylinder comes out, the truth is that I do not understand much about pneumatics, but I would like to know how they do it so that all the air does not come out, Without further ado, I bid you farewell and send you my cordial greetings

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Hm that’s a bit strange, could I see your set up? Also try different fittings on your solenoid and pistons and see if that is what is causing your problem

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Thank you very much for replying​:pray::pray:, I’m sending you pictures of how my pneumatic is connected

When you run your double-acting air cylinders as if they were single-acting, you need to plug the other port on the solenoid. That’s why you lose all your air.

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ThI tried to cover them with electrical tape but still the air was escaping, it should be noted that I covered port B and the R that is below B.

Is it okay to cover both ports?

How would you recommend me to plug those ports?

like this : on the b port of your pnematics :
WIN_20240312_18_54_52_Pro-removebg-preview
This creates a plug that prevents air from coming out.

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