Correct, It is a fiber optic system. The problem was actually in a adaptor (rs232 I think to USB) that would have been properly grounded had the USB went to a tower (non laptop) chassis. This is as I understood it.
What I can say for sure, is it runs great now. This may have been a problem that has plagued me (and DT) for some time. When we first installed it this happened and this is the second round of trouble. Let me tell you- they have spent lots of $$$$ on warranty and tech support with our machine, in fact our machine is out of warranty and our cost has been basically shipping of small parts. They stand behind it, if this is a needed fix, I am sure it will be addressed and corrected.
a few months ago, I asked Mike Clem if it was possible to do a few tricks with the G-code. He said no but give him a few days. I had a new version that did what I needed two days later. These are just facts, true accounts of how they deal with there customers.
I have no clue if the lines should have been isolated, but I do know I am happy when a part comes of the table that that needs no finish work. I actually had some parts returned becuase the edges were "too sharp", the DWG stated "break all sharp edges" I had to laugh.
I hope everyone is enjoying the Fullmoon as much as I am!!
Cheers,
WSS
PS, I am curious what cncheese's solution was?