[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!