BOB\Driver crashing? on CNC Plasma table.

[gr8fun]

Hi JAZZCNC

I think I should be doing something, even if it s to earth all the bits (table, water bath, garage doors etc.) to the same star earthing point as currently nothing is earthed unless it is plugged in (and I'd hazard a guess some of my kit does not have earth connected! - I inherited much of it from my grandfather)
So I plan to link it all up and connect it to the mains earth (the rod arrived, but I've not decided on a location for it yet - if i can use the mains earth that will save me a job.)

Moving on to the shielded cable, I've just got my head around mains wiring, but signal cables are a totally different ball game I'm sure.
What should I be looking for? I need 4 core shielded, but how "big" or "small"? Is bigger better or detrimental?

I'll be taking the opportunity to relocate the PC and drivers etc. further away from the table so this is all a good thing :-)
Thanks for your help everyone.

Dan