Yes, I figured as much, but I figure it’s a problem that should be solved and the noise looks like a contributing factor.
I am guessing that the source of the trouble is probably the VFD, as 80kHz seems like a plausible base frequency for driving an AC motor. Only the USC should be operating at a frequency higher than 60Hz other than the VFD. The machine uses three gecko drives and large steppers, so it’s not very sophisticated. I traced out the grounds briefly and while they look fine, I did some dumb stuff. Like running a ground wire from a 12V power supply to a terminal block, then back to the ground connection, making no other connections at the terminal block — no idea why I’d have done that. > On Aug 4, 2020, at 8:48 AM, andy pugh <bodge...@gmail.com> wrote: > > But, random indexes shouldn't actually have the effect described. The > index-enable only gets set once at the start of the cycle. It > shouldn't matter what the Z-phase does from that point on. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
