On Fri, 9 Jul 2021 at 18:43, John Dammeyer <jo...@autoartisans.com> wrote:
> Although if I understand the G31.1 correctly the Z axis tracks the encoder > reported speed right? No, that would be silly. It tracks the actual spindle position. G74 / G84 work on open-loop velocity, but assume a tension/compression head. > So the spindle speed before the tapping starts and for reversing is really > more of a guide than an actual written in stone value? > > In other words, is the PID even needed? No, you can, in fact, turn the spindle off and rotate it by hand and LinuxCNC will still track. -- 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
