pic: Servo Controlled Valve

[kmcclary]

loading photo ...

[Nate Laverdure]

Interesting and novel idea, but I can't think of a use for it.

And does this violate <R99> (customizing pneumatics components)?

[Darkforces]

nice

[Nitroxextreme]

My best guess at an application would have to be some sort of cut off valve to lock in a vacum....seems like a solenoid would also provide the same effect

[kmcclary]

Originally Posted by Nitroxextreme

My best guess at an application would have to be some sort of cut off valve to lock in a vacuum....seems like a solenoid would also provide the same effect

A good app (IF you get the speed up with servo and/or valve changes, as I suggested above).

Nope, you can't use a kit valve for directly controlling vacuum. If you look at the kit valves specs, they are ALL "piloted". That means they need positive air pressure on their inputs (of several TENS of PSI), just to operate. Therefore, they can only control air going INTO your Vacuum Generator, and the VG must be directly connected to your suction cup. (Which DOES work...)

But if you are intending to generate vacuum with a kit motor, be aware that none of the kit valves are capable of directly controlling vacuum, because even a perfect 14.7 PSI differential across them isn't a sufficient pilot pressure to allow them to operate.

- Keith

[AdamHeard]

This would be nice to automatically close the valve at the start of the match. We lost 2-3 matches in 2005 from not closing our valve which powered our gripper.

[Ed Sparks]

Not to rain on anyone's parade..........

This valve's main purpose is to "Dump" air pressure quickly in the event of some emergency (like the main breaker for your pneumatics). If you have this thing embedded in some other device, you obviously will not be able to access it. It's suppost to be located in a place that can be accessed quickly (again, like the main breaker).

Hint:
I would not pass this thing in tech inspection.

[jgannon]

Originally Posted by Ed Sparks

Not to rain on anyone's parade..........

This valve's main purpose is to "Dump" air pressure quickly in the event of some emergency (like the main breaker for your pneumatics). If you have this thing embedded in some other device, you obviously will not be able to access it. It's suppost to be located in a place that can be accessed quickly (again, like the main breaker).

Hint:
I would not pass this thing in tech inspection.

Ed, if you read the other comments and the description on the picture, you'll see that this mechanism is being used as a valve to operate under a vacuum. I suspect that in order to be legal, they are using another identical valve elsewhere to operate as the "breaker" that you describe. In light of this, I don't see any reason why it wouldn't pass inspection.

[Nate Laverdure]

Will it really work to "lock in" a vacuum seal on the inner tube, or will you have to constantly supply suction to maintain grip?

[DonRotolo]

Originally Posted by kmcclary

stopping a cylinder in a mid-position, by plugging the vent port.

No need to do that, see This Post, COTS stuff that does that exactly. But see Here, too to understand why you might not want to do this.

Originally Posted by Nate Laverdure

Will it really work to "lock in" a vacuum seal on the inner tube, or will you have to constantly supply suction to maintain grip?

You need to supply vacuum almost continuously, there is a certain amount of leakage. Also consider how to let it go... But, maybe you want to use a Clippard tank to store vacuum, this'll seal it in.

Don

[Brian C]

Maybe I'm oversimplifying this but. Why not just run an additional variable regulator downstream between the solenoid valve and the vacuum generator?

This way you can operate the kit valves at an increased pressure (ie: 60psi) and then regulate the pressure down to your desired psi for the vacuum generator.

[AV_guy007]

my guess is that it open the value to empty the pneumatics system instead of doing it by hand

[lukevanoort]

I'd guess it is for controlling vacuum. I'm surprised the servo has enough torque, those valves can be sort of sticky.

[ADZDEBLICK]

would this work as a variable solenoid of some sort?

[redbarron]

Maybe it dumps the system to let down the ramp instead of using a solenoid to extend or retract a piston if its a one shot deal. Though i dont think thats legal is it?