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Unread 25-11-2015, 16:06
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Re: Automation Direct solenoid question

Quote:
Originally Posted by FrankJ View Post
We always use single solenoid valve unless there is a design reason to use a double solenoid valve.
We used double solenoids exclusively our first three years because it's all we had. We figured out late in the 2014 build cycle that single solenoids would have been much better. Our understanding is:
  • Single solenoids are less expensive, use fewer electrical ports, and are appropriate for a mechanism that has a "default" state which it is in most of the time, and is only actuated occasionally, e.g. a launcher. We should also have used singles to emulate a 3-position valve, where we kept air pressure on both sides of our pistons most of the time, and exhausted air on one side or the other to move our arm.
  • Doubles are better when the cylinder spends similar amounts of time in each state.
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