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Unread 09-09-2012, 22:40
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Re: Andy Mark Supershifter with Pneumatic shifters

Quote:
Originally Posted by jspatz1 View Post
Pneumatic solenoid valves of the type used in FRC are internally piloted valves, which means the pressurized supply air is used to actuate the valve spool, not the solenoid. The solenoid is very small and only opens a tiny port to trigger the pilot air. Such valves have a minimum pressure that will allow it to operate, usually around 30-40 psi. So they actually prefer a high pressure and only function reliably when it is sufficient. So a note to teams: If you have a valve that is not responding when you are certain it is getting a proper electrical input, and you are using low pressure, chances are the pressure too low for the valve to operate.
Right, and the minimum pressure for the valve we were using was at 20PSI. For me, that's not a good reason to say that you need to generate the same force as a 60psi 1/2" piston with a push/pull solenoid to make the thing work.
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