On 16 March 2018 at 19:29, Ralph Stirling <[email protected]> wrote: > This offset approach is proving harder than I expected. I think it is > because I'm > using the PID-driven stepgen approach generated by pncconf (7i92 board).
Ah, yes, that will make things harder. You could try using a conventional non-PID setup, those always used to work pretty well, if not quite so well as the PID based one. > I think the velocity gets messed up by the step function in position, > and the pid loop is using velocity. Any further suggestions for > achieving my invisible 90 degree rotations? You could put a limit3 component between the G-code output and the offset input. That would remove the step. -- 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
