Andy just to confirm. On a 7i76 the 0_10v is isolated from the Mesa card I think. Is a 7i77 similar? I just a bit cagy about connecting up electrically to the VFD inputs. As I don't want to blow anything.
I'm still struggling to understand how this would work. On Fri, Oct 30, 2020, 12:49 AM andy pugh <bodge...@gmail.com> wrote: > On Thu, 29 Oct 2020 at 10:23, andrew beck <andrewbeck0...@gmail.com> > wrote: > > > I think the 7i77 is a bit different though and just wondering how to best > > control the VFD > > The 7i77 is +/- 10V so you would want to use an "abs" module to make > sure that the 7i77 analogout doesn't see the negative spindle speed > commands > Then set up GPIO using the abs.is-negative / is-positive outputs to > trigger the direction inputs. > (possibly using reed relays for isolation) > > -- > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
