picture/diagram of controllable single/double

[holty531]

does anyone have picture or diagram of the controllable actuator system, using a single to control air to the double?
i have tried following the text instructions i have searched however none seem it do it.

[Jeff 801]

Sorry to bring this back up but does any one out there have this digram or a link to it
Thanks

[Racer26]

It looks basically like this


-------- EA ---------- EA
| |------\ P | |-------| (plug)
Pressure In-----| DS | EB |--------| SS | EB
| |------/ | |-----> (open to atmosphere)
-------- ----------
| | A| B|
A| B | \__/
------|=======|



Use the DS to control direction, and the SS to allow/disallow movement.

[DonRotolo]

An alternative is to just buy the correct solenoid valve to allow for mid-cycle positions called a "Three-position pressure center" valve. The spec sheet is here. (http://www.smcetech.com/CC_catalogs/smc/pdf/SY3000_Valve.pdf) Look at valve type SY3520-6H, for example.

Don

[Racer26]

That works too, under the current rules. The system I laid out above, and personally devised in ~2004 (maybe not the first to do so, but I did it on my own) works with exclusively KOP parts, and I would argue can be made better (with addition of a couple other components) than a center off valve, as far as stability/accuracy goes.