Gee, does that mean we can't run our Tesla Coil next to our CNC Router? LOL.
http://hot-streamer.com/pool/i4a.jpg Bert's Tesla Page
Seriously, I'm grounding everything. If nothing else just string a 10 gauge wire from your machine to a pipe that is at least 2 feet, or more, in the ground (or plumbing pipe). All the metal casings on the machine and the frame needs to be grounded somehow. Sorry to hear about your loss jgro!