/// <summary>
/// Push a tray into tray stack from conveyor.
/// </summary>
public void PushOut()
{
_mc.VUnloadConveyorCylinder(TrayCylinderState.PushOut);
_mc.VUnloadConveyorCylinder(TrayCylinderState.Retract);
if (GetOutsideOpticalSensor() == true)
{
throw new Exception("Tray stuck on conveyor");
}
}