[ak_Knight]

Yes, you are correct. Our team uses a multi positioning pneumatic system. We have a single and a double solenoid. The double solenoid is used to determine direction of movement. The exhaust from the double is handled by the single, thus allowing multi positioning.

Our system is simple and effective, you need three spikes which are accompanied by 3 joy stick buttons. The buttons attached to the double solenoid simply handle the direction. The button attached to the single, is the trigger button. The longer you hold the “trigger” button the longer the piston actuates. The shorter you hold it, the shorter the piston actuates.

If you need further explanation, feel free to ask.