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Originally Posted by Kevin Sevcik
Several comments here. First, the double solenoid valve spec sheet says the maximum operating frequency is 10 Hz on the
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Figures. They are air piloted and very low wattage. You can faster acting ones that are FIRST legal.
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Originally Posted by Kevin Sevcik
Second, I just had a brain wave. From Eagle Master's post up there. It's hard to get high pressures on both sides of a FIRST piston and still move it and such. But you could use a piston to hold something in place if it was otherwise actuated.
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This brings to mind the appropriate off the shelf part, which of couse the overly-prohibitive FIRST pneumatics rules prevent us from using.
http://www.bimba.com/break/news54.htm
Basically, it is an ordinary cylinder with two enhancements.
*A position feedback resistor
*a second single-acting cylinder which actuates an integrated device which locks the cylinder rod in place, preventing it from moving.