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Unread 10-29-2017, 02:30 AM
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Speed Flow Control Pneumatic Connector mechanical

Is there any way to find a Speed valve Flow Control Pneumatic Connector that I can control it without using a mechanically.
I mean the speed of the flow
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Unread 10-29-2017, 02:14 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

Such devices exist.

However, they will likely be more expensive than mechanical flow controls, and they're probably not legal for use in FRC if this was your intention.
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Unread 10-30-2017, 02:56 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

There are mechanical valves that can reduce the speed of the air flow.
I used these to slow down the movement of 2 pneumatic cylinders.
Something like this.
https://www.alliedelec.com/smc-corpo...-07s/70071623/

Dave
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Unread 10-30-2017, 03:40 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by DaveL View Post
There are mechanical valves that can reduce the speed of the air flow.
I used these to slow down the movement of 2 pneumatic cylinders.
Something like this.
https://www.alliedelec.com/smc-corpo...-07s/70071623/

Dave
Thank you
Yes I use them, But I need advice not mechanical valves to control the speed of Flow of the air
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Unread 11-15-2017, 11:42 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

I think we're a little confused by your request.

Do you want to control the speed of a pneumatic cylinder electronically?
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Unread 11-15-2017, 03:24 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

What application would you use them for?

If it's to control the speed of a pneumatic cylinder, I doubt it will respond fast enough. Those types of valve are generally used for continuous flow applications.
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Unread 11-15-2017, 03:49 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by DaveL View Post
There are mechanical valves that can reduce the speed of the air flow.
I used these to slow down the movement of 2 pneumatic cylinders.
Something like this.
https://www.alliedelec.com/smc-corpo...-07s/70071623/

Dave
Those will only slow the cylinder to a specific speed. It cannot dynamically control the speed of a cylinder.


Something like this ( http://ph.parker.com/us/12051/en/oem...ure-controller ) with a spring return and position detection cylinder (Internal potentiometer) will work ... and you could even dictate how far you want the cylinder to extend.
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Unread 11-15-2017, 04:15 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by Daniel_LaFleur View Post
Something like this ( http://ph.parker.com/us/12051/en/oem...ure-controller ) with a spring return and position detection cylinder (Internal potentiometer) will work ... and you could even dictate how far you want the cylinder to extend.
I understood that the OP wanted to throttle the speed of the airflow mechanically (with a hand valve), not electronically on the fly. If I'm wrong though, you don't necessarily need a fancy servo valve or electronic regulator. Teams have had success sending a PWM signal to a regular old solenoid valve.

(I just spent 15 minutes unsuccessfully looking for a half remembered 2014 reveal video of a pneumatic catapult shooting from a half-dozen locations on the field, but I can't remember who it was now)
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Unread 11-15-2017, 04:25 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by nuclearnerd View Post
I understood that the OP wanted to throttle the speed of the airflow mechanically (with a hand valve), not electronically on the fly. If I'm wrong though, you don't necessarily need a fancy servo valve or electronic regulator. Teams have had success sending a PWM signal to a regular old solenoid valve.

(I just spent 15 minutes unsuccessfully looking for a half remembered 2014 reveal video of a pneumatic catapult shooting from a half-dozen locations on the field, but I can't remember who it was now)
I read it as just the opposite, IE not using a mechanical needle valve.

Most PWM generators cannot produce enough current to drive a valve. That being said, your suggestion would work with some lower current valves.

Truly, it depends on the OPs application.

I still like being able to extend a valve to what ever length I want
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Unread 11-16-2017, 01:23 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by Kevin Thorp View Post
I think we're a little confused by your request.

Do you want to control the speed of a pneumatic cylinder electronically?
Sorry for that confused, I am looking to regulate the speed of Flow of the air electronic controller, if there is.
Not the pressure controler
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Unread 11-16-2017, 01:36 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

Let's see if I can translate properly:

You want to use an electronic (not mechanical) method to control the speed of air flowing past a point in a pneumatic system.

In other words, something like http://www.andymark.com/product-p/am-2897.htm, but electronic not "turn the screw".



I don't know for sure if something like that exists. If I had to whip something up I'd grab a continuous-rotation servo, attach that to the knob on the linked piece by a method to be determined, and use the servo to adjust the flowrate.


I'm really wondering why you'd need to do that, though...most applications you'd just want to set the speed once.
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Unread 11-16-2017, 12:06 PM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by EricH View Post
Let's see if I can translate properly:

You want to use an electronic (not mechanical) method to control the speed of air flowing past a point in a pneumatic system.

In other words, something like http://www.andymark.com/product-p/am-2897.htm, but electronic not "turn the screw".



I don't know for sure if something like that exists. If I had to whip something up I'd grab a continuous-rotation servo, attach that to the knob on the linked piece by a method to be determined, and use the servo to adjust the flowrate.


I'm really wondering why you'd need to do that, though...most applications you'd just want to set the speed once.
The item I pointed to in my earlier post has a variable size orifice, which acts essentially like a high speed needle valve.

It can be equipped with a downstream bleed orifice or not. Making it either a pressure controller or a flow controller.
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Unread 11-17-2017, 11:02 AM
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Re: Speed Flow Control Pneumatic Connector mechanical

Quote:
Originally Posted by EricH View Post
Let's see if I can translate properly:

You want to use an electronic (not mechanical) method to control the speed of air flowing past a point in a pneumatic system.

In other words, something like http://www.andymark.com/product-p/am-2897.htm, but electronic not "turn the screw".



I don't know for sure if something like that exists. If I had to whip something up I'd grab a continuous-rotation servo, attach that to the knob on the linked piece by a method to be determined, and use the servo to adjust the flowrate.


I'm really wondering why you'd need to do that, though...most applications you'd just want to set the speed once.
That's exactly my question
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