My last update on my plasma table has been to convert to a water table. I run the water just touching the bottom of the metal and have virtually no dust or smoke. I welded up a tank that sets under the table and connects the pan under the cutting slats. The pan is 4 inches deep and contain the slats. I raise the water using regulated air to the tank. It's very controlable. The pipe that connects the pan to the tank reaches almost to the bottom of the tank. Another fitting in the top is connected to a "Tee" fitting with a valve on each side of the Tee. One side is connected to the air supply, the other to open air. By closing the open air valve and opening the pressure side the water level can be raised or lowered. On mine I made the tank large enough to fill the pan, or drain it completly down to reduce evaporation loss as well as humidity in the shop.
One tip I got from this forum is to use a little soda ash, 3 cups or so(available from pool suppliers) to keep the water from getting stagnant. Tank holds about 100 gallons of water. Works great
never set a pace that you can't maintain
Traveler