air cylinder cotrol palm engraver

by richard westerfield
(hackensack new jersey)

dear sir
do you know of a way i can build a air cylinder cotrol plam engraver

if i sound like a nut case i am not

its air cylinder that drives a graver back and fouth with pressure seed control in the handle

as you push the the handle with your palm it go faster and faster when you let of the plam of your hand it goes slower and slower please help me if you can

thank you

Richard Westerfield

____________________
Bill says...

While I do not know of a valve that you can buy "off the shelf" to me, what you are describing, is a sort of "dancer valve" that reacts to increasing or decreasing pressure on the lever (or in your case the palm valve operator) to increase or decrease the flow of air to a single acting, spring return, air cylinder.

I welcome contributions here from companies that might manufacture these types of controls.

Cheers,

Bill




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air cylinder cotrol palm engraver

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Oct 14, 2011
 air cylinder controed palm engraver
by:

any one else want to add to this post
thank you
Richard Westerfield
Sep 16, 2011
 danceing valve
by: richard westerfield

where can i find one of these and are they big ?
my be if i had a picture of one i would have a better idea of what i am geting myself in
thank you
Richard Westerfield

___________________

Richard, I don't know where you are in the world so I can't offer any specific info. Contact your local industrial suppliers of air cylinders and air valves. Any of them that have been in industry for a while will know of this type of circuit / valve.
Sep 07, 2011
 "dancer valve"
by: Anonymous

whats a "dancer valve"
thank you
Richard Westerfield

__________________

One that responds to a changing input with a varying outflow. A basic one has air outflowing one port or another depending on the movement of the valve actuator. More complex ones can vary the outflow volume as well.

Think of a moving web, tracking back and forth on a roll. As the web moves off the roll towards one side it pushes on a lever that alters the angle of the roller slightly via an air actuator to move the web back onto the roll. As the web tracks to the other side of the roll, it releases the valve actuator, which alters the roller angle slightly the other way, to bring the web back. The web "dances" back and forth. Or, it could be used to increase or decrease tension on a web so that the web "stretch" stays within parameters.

B.

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