Quote:
Originally Posted by GeeTwo
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...[/list]
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The main thing that should drive the decision to use single- vs double-acting solenoids is the desired failure behavior. When the controls enter a disabled condition (between auto and teleop, at the end of a match, when the e-stop button is pressed, etc) double-acting solenoids will remain in the state that they were last actuated into. Single-acting solenoids will automatically (regardless of the amount of air pressure) return to their default state; a competent robot designer would evaluate whether this will have any safety or gameplay implications.