How do you make your compressorless system work, when all valves "bleed" air slowly?

[kmcclary]

Originally Posted by WeldedHarlequin

I am [our team's] pneumatics captain.
I encountered this problem with the new SMC dual coil solenoids this year, and if you want to go that route I discovered that the problem significantly lessens (if not dissappears) when you remove the small gasket (there are two, one more flat, one smaller and more rounded). Having only the flatter gasket seemed to help.
[...]
My situation may be different, but I was using the Rexroth after the SMC (In Series, to slowly adjust the throw of the actuator). Here's what I did (a little bassackwards): [used the Rexroth to plug the SMC's exhaust ports].

An excellent suggestion! I'll try a series valve string. (That's an easy test.) Who knows? It may at least SLOW the leak enough to work for this year.

Originally Posted by imax48236

The part number of the solenoid we used last year was made by Rexroth, with part # 5728400410

http://www.boschrexroth.com/pneumati...o= 5728400410

This was in last year's KOP, and is available for purchase this year. We have an extra if you want to trade/buy it.

Thanks for the offer, but that's the one I tried already (see above). It too slowly bleeds out its exhaust port. It was better than the Festo, but worse than the SMC dual coil. (It's also too late for mail swaps before ship, but we appreciate the thought!)

We're definitely overweight right now, so I *have* to solve this one so I can delete the compressor. (That's over four pounds!)

No more overnight shipping now (no mail on Monday), so unless someone else has some really slick trick we can try in the next two days with whatever we have on hand (or can get from a hardware store), I may have to resort to whipping up another "digital cork" servo-valve again.

Any other suggestions, anyone?

- Keith McClary
Chief Engineer, Team 1502 "Technical Difficulties"