On Wed, 2 Feb 2022 at 07:44, Thaddeus Waldner <thadw...@gmail.com> wrote:
> 2) why is servo thread jitter even making into the stepper pulse train with a > Mesa Ethernet card and no communication errors? Do I have anything > misconfigured? The idea of using a PID is that it compensates for the fact that the servo thread updates don't get to the card exactly every servo period. Sometimes the feedback - calculate - send of the required step rate will run early, sometimes late. I am hoping that PCW might pop up to explain exactly why the PID helps here. It's not something I have paid that much attention to as I rarely use steppers. It might be interesting to try a non-pid config. (or just set P to zero which has about the same effect) -- 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, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
