[gburlison]

Originally Posted by Transformers

We have tried both types of the solenoids provided in the kit, but neither of them have a neutral state or where the actuator will stop when the button is let go and continue when pressed again. Would we have to purchase seperate solenoids with such a state already part of them? Thanks.

In general, that is not the way pneumatics work. If you can connect a solenoid valve up to the exhaust port on the existing valve ( with some solenoid valves this is not easily done ) then you can stop the cylinder by not letting the air exhaust. This can be very inexact and will change as the load changes because the air will compress. With proper programming this can work, but the positioning of something like an arm will not be very precise.