On Wed, 21 Jul 2004 15:14:15 +0000, Bruce L. Bergman wrote:

Distance is the solution to hot metal bits lighting the bag off -
make the downdraft welding table of all metal, and run a long
sheet-metal suction duct outside to where the dust collector fan unit
is. Any hot metal that has to travel 20' or more through the ducts
should have enough time to cool down before hitting the filter bag.

Outstanding suggestion, and much cheaper than a cyclone.
--
The instructions said to use Windows 98 or better, so I installed RedHat.