On Sunday 27 December 2020 07:46:04 andy pugh wrote: > On Sun, 27 Dec 2020 at 06:10, Gene Heskett <ghesk...@shentel.net> wrote: > > After reading several different versions of the manual I've found > > online, and killing another tree for hard copy BIG enough to read, > > it becomes obvious that the common point reference for the speed > > input AND the MultiFunction terminal labeled VO in my unit, all use > > the AGM terminal as a commom reference, while the FWD(RUN in my > > case)/REV are referenced to the DCM terminal. > > Do you mean ACM (analogue common?)
Yes, my typu, sorry. At the size of type used in the manual that came with it, it takes a 16mm projection lens to magnify it enough to tell the diff between a C and a G. Great printing job, but in 1 point type. > DCM is listed as digital common. And while it is not common, several megohms between them apparently actually grounding them has no effect on its operation. But if ACM isn't grounded to the 7i76 ground, then the analogin# have no ground reference to measure AM(marked VO on my unit) from. So the reading is zero most of the time and only a small floating point value when It does flicker up a an occasional reading. I had to drag my sampling scope up on the shelf, and probe the orange connector to discover nothing on it is an actual ground. And in order to properly redo that wiring I'll need to add some ground jumpers, at least one and to segregate it right, move some signals from one cable to the other. Might as well start all over. So I will. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
