Air Cylinder

[Reggie335]

Originally Posted by Kevin Sevcik

You should be able to answer that from what we've covered in this thread, so why don't you tell me what you think the answer is and why, and then I'll tell you if you're correct. Teach a man to fish and all that.

What i have Learn the Minimum Working Pressure Is 124psi. i our cylinder Max pressure is 250psi and the rule don't have any restriction on what type of air Cylinder we use so. I say We Can Use These Air Cylinders

[Kevin Sevcik]

Originally Posted by Reggie335

What i have Learn the Minimum Working Pressure Is 124psi. i our cylinder Max pressure is 250psi and the rule don't have any restriction on what type of air Cylinder we use so. I say We Can Use These Air Cylinders

Correct! Well. The max working pressure of the cylinder has to be 125psi, but 124psi is close enough, heh. Go forth and select air cylinders with confidence, as you now know all you need to determine if they're legal or not.

[Reggie335]

Originally Posted by Kevin Sevcik

Correct! Well. The max working pressure of the cylinder has to be 125psi, but 124psi is close enough, heh. Go forth and select air cylinders with confidence, as you now know all you need to determine if they're legal or not.

Thank You Very Much For The Help

[Racer26]

Originally Posted by Kevin Sevcik

Art,
I've seen 5/2 valves out there in FRC. That's actually the style that Vex sells. A 5/2 valve is always sending pressure to one of the output ports. You'll need to plug one of the outputs in that case, or you'll end up dumping pressure to atmosphere when you're exhausting the cylinder. You need either a double solenoid 5/3 center exhaust valve or a single solenoid 3/2 valve.

Not sure why you think that you couldn't run a spring return cylinder on a 5/2 valve.

5/2 single solenoid valves typically used in FRC have 3 ports on the input side (EA, P, and EB), and 2 ports on the output side (A, and B). When the solenoid is not energized, P->A and B->EB. When the solenoid IS energized, P->B and A->EA. If I connect my spring return cylinder's port to B, and plug A (either with a brass plug, or a hose to a T that has a loop of hose between its other two legs), this will work perfectly.

Truly, I have even built a pneumatic system on an FRC bot that could stop in the middle of its travel by using a second valve to control whether or not EA/EB goes to atmosphere.

[Kevin Sevcik]

Originally Posted by 1075guy

Not sure why you think that you couldn't run a spring return cylinder on a 5/2 valve.

5/2 single solenoid valves typically used in FRC have 3 ports on the input side (EA, P, and EB), and 2 ports on the output side (A, and B). When the solenoid is not energized, P->A and B->EB. When the solenoid IS energized, P->B and A->EA. If I connect my spring return cylinder's port to B, and plug A (either with a brass plug, or a hose to a T that has a loop of hose between its other two legs), this will work perfectly.

Truly, I have even built a pneumatic system on an FRC bot that could stop in the middle of its travel by using a second valve to control whether or not EA/EB goes to atmosphere.

*clears throat*

Originally Posted by Kevin Sevcik

I've seen 5/2 valves out there in FRC. That's actually the style that Vex sells. A 5/2 valve is always sending pressure to one of the output ports. You'll need to plug one of the outputs in that case, or you'll end up dumping pressure to atmosphere when you're exhausting the cylinder.

But, of course, if you have a 3/2 valve, plumbing is a lot simpler and less prone to leaks.

[Racer26]

Originally Posted by Kevin Sevcik

But, of course, if you have a 3/2 valve, plumbing is a lot simpler and less prone to leaks.

True.