Andy, That sounds plausible, I will check at the next opportunity.
Thanks, Eric On November 1, 2017 8:14:07 PM EDT, andy pugh <[email protected]> wrote: >On 1 November 2017 at 23:25, Eric H. Johnson <[email protected]> >wrote: > >> The problem is in the A axis. It seems to be >> losing encoder counts at very low speed, but not otherwise. It took a >bit to >> track down because when I initially had it moving multiple rotations >I could >> not get any errors running A by itself. Running with a feed rate in >excess >> of 20000 (Degs per min), resulted in no errors. Slowing down to 10000 >> started to show a very small amount of error, and from 5000 on down >the >> error was very pronounced. > >I think that this might be a floating GND or a half-disconnected >differential signal. > >My thinking is that at high pulse rates you get AC coupling and the >data gets through, but at low pulse rates the coupling breaks down. > >-- >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 >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
