Back when I was making my own Biesemeyer clone (http://joe.emenaker.com/Table-Saw%20Fence/Table-Saw%20Fence.html ), I was cutting a lot of angle-iron and steel tubing on my RAS fitted with a metal-cutting wheel. Boy, did that thing make sparks like the dickens! I thought it was going to ignite the sawdust which had accumulated behind the RAS from earlier projects.
Well, I'm about to buy a DC and make my own cyclone for it. It struck me that I'd be *asking* for trouble if I tried cutting metal with a DC hooked up and running.
But what if I had a cyclone which emptied into a bin with a little water in it? The water would catch all/most of those sparks. Not only that, but it would be nice just for plain wood chips, since it would help keep them under control when you detatch the bid to dump it out... and it would help guard against some other DC-related fire hazards (like hitting a nail or something).
So, I figured I'd ask: Does anybody out there *do* this? Alternatively, has this been discussed before?