On 9 May 2018 at 00:00, andy pugh <bodge...@gmail.com> wrote: > I will try that. I do have the ferrites on the 3 x 8i20 that run the > other axes.
The latest on this is that I have re-assembled the machine in the original configuration to begin trouble-shooting and the accursed thing is working perfectly. The only departure from the troublesome installation is that the motor frame-earth wire in the servo motor cable is now _not_ connected to the earthing block on the DIN rail that mounts the STMBL. This does actually fit with both John's discussion of capacitive coupling between the windings and the frame and PCW's mention of ground-bumping. It seems wrong to leave it hanging, though. I might try connecting it to the mains-power earth (which is continuous from the wall plug, through the PSU, DC power cable and to the STMBL DC input.) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
