Quote:
Originally Posted by novamx3
You can't use them to stop the stroke at a point... They are strictly for sensing when the cylinder has reached it's end of stroke (or a given point but the cylinder will still continue onto the end of stroke unless it has flow controls and is limited to a very slow travel rate.). Almost all pneumatic cylinders have 2 positions and 2 positions only (typically extended or retracted). If we could use hydraulics we would be talking about lvdts and proportional controls... Alas, it is against the rules!
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As nova stated above, these switches are only to be used to check whether a cylinder is in a certain state. This might be useful for things like: "Is the loader inside the frame?", "Is our launcher completely reset?", etc. Some of that feedback can let the cRio know if you're in a state that's ready to shoot, possibly keeping you from dry-firing.