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Originally Posted by eren96
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There's a red dot on the input to Solenoid Set. It means you've connected something of a type that the function doesn't expect, and it has coerced the value to something it can use. Where did you get the Forward, Reverse, and Off constants that you have going into the Select functions? It's possible that you're feeding the Solenoid function with Relay values. They happen to be completely compatible and shouldn't cause problems, but it's usually a good idea to keep the program as "happy" as possible.
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Although the pressure switch or compressor aren't wired, we can't extend the pistons below nearly 100 psi. Is it normal?
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Most pneumatic systems will "work" down to 30 psi without difficulty, though they of course won't provide much force. I don't think your symptoms can be explained by anything in the code. It's probably time to examine your pneumatic system in detail. What kind of solenoid valves are you using? Do they have a manual actuation feature, perhaps a small button or lever?
Or maybe whatever you have the cylinder connected to just requires that much force in order to move. What is the mechanism you're trying to activate with the cylinder?