Quote Originally Posted by n0f8r View Post
Ok - thanks - looking at getting one of these since my current chinese controller does random shit (like sending the gantry in random directions at full rapid speed) when I try to use Mach3 probe wizard routines from ProbeIt or ProbeWizard - and the ProbeIt guy says the CNCDrive controllers work...

Bit confused though - shouldn't an opto-isoloated output from the AXBB help avoid grounding issues?

[edit] - I still haven't really got my head around ground loops - but I suppose it depends on how you're powering those outputs and the VFD, and I guess the opto-isolation is only between those outputs and the Ethernet inputs from the computer

so I guess I'll just try it and hope for the best - I'd guess my current controller has the same kind of direction output feeding into my VFD, so hopefully that means I don't have the same grounding issue.
I got the AXBB-E and upgraded from Mach3 to UCCNC at the same time and am glad I did. One thing I didn't know at the time was all the built in probing options. You can download it and runn in demo mode to take a look at them.