Controling Pnumatics with joystick.

[Tytus Gerrish]

Originally Posted by 45Auto

The valves must be open when the power is off so the vent valve can relieve all stored pressure. See rule R73.

<R73> The pressure vent plug valve must be connected to the pneumatic circuit such that, when manually operated, it will vent to the atmosphere to relieve all stored pressure. The valve must be placed on the ROBOT so that it is visible and easily accessible.

if they use a doubble-acting valve for the cylender and 2 single-acting valves to stop the exhaust they would fail open and allow the whole system to purge