Stop Fiddling with Valves! Automate Your CNC Vacuum Table. Every CNC operator knows the routine: walking back and forth to cycle manual blast gates, or ruining an expensive sheet of material because someone forgot to open the valve before hitting start. This smart controller completely automates your vacuum. By simply updating your CNC file with a pair of start and stop commands. Making activation right from your CNC screen possible with the added option of an illuminated push button or remote.