Kirk Wallace wrote: > On Fri, 2009-01-16 at 09:12 +0000, Tom wrote: > >> Gene Heskett <gene.hesk...@...> writes: >> snip... >> >>> That pretty much leaves noise pickup or ground loops. All grounds should >>> be >>> star topology and tied well to the 3rd pin of a power plug. Shielding on >>> cables should be tied to ground at only one end else that can setup a >>> ground >>> loop... >>> >> Mike, >> >> I second Gene's take on your problem. There is spurious noise in your limit >> sense inputs which is triggering the limits as far as Emc2 is concerned. I >> had >> > ... snip > >> shorter than -- duration (you set the time constant). If you do a search >> here in >> this forum on "debounce filter" you should find plenty of information. >> >> Tom >> > > Has anyone tried using a fiber optic link for sensors? > That would work, but optocouplers and current-loop sensing of switches is simple and works well.
Jon ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
