Thanks Chris, that was my thinking as well. I’ll try that tomorrow and see what we find. I’m not sure there’s much more I could disconnect in the ground department, but we’ll start looking at that after we isolate the problem to encoder vs. USC board.
> On Aug 1, 2020, at 5:35 PM, Chris Albertson <albertson.ch...@gmail.com> wrote: > > On Sat, Aug 1, 2020 at 11:40 AM Matthew Herd <herd.m...@gmail.com> wrote: > >> Thanks Gene, I hope you’re well also. I disconnected that grounding wire, >> no difference observed in the ppmc.0.encoder.03.index behavior. The noise >> seems the same both when spindle is running and stopped, with a tendency >> strongly toward "true" than "false." Pulses seem to be both long and >> short, but I’d guess they’re about 80-90% true. Not at all what I’d >> expect, even with noise. >> > > Should be easy to see now where the problem is. Disconnect the encoder > cable and look at the actual wire with a real 'scope, not a software hal > scope. Is the signal a clean quadrature when the spindle turns or noisy? > If the signal is clean you know the problem is the interface card or a > connector and if noisy the encoder itself is the problem > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
