> > What are you searching for? You don't really need the optical isolator if > the VFD and computer grounds are tied together. If you do want isolation > then almost any optical isolator will work Even those "C" shape sensors > will do the job, The resistor and the capacitor are essential but their > values are not critical as long as the product of the R and C adds up to > about the same. >
I just need a speed reference for the VFD that drives the spindle. I wrongly thought my VFD had pulse input, that's why I didn't purchase any card to interface with the VFD. So now I have to decide wheter I use analog speed reference, or the increase/decrease method with the VFD's digital inputs (which I don't really know exactly how it behaves or in which increments it works because the manual is pretty quirky). But I guess I'll give a try to that second option and see how it works, since it's only a little wiring and some hal logic. El dom, 3 abr 2022 a las 0:54, Chris Albertson (<albertson.ch...@gmail.com>) escribió: > What are you searching for? You don't really need the optical isolator if > the VFD and computer grounds are tied together. If you do want isolation > then almost any optical isolator will work Even those "C" shape sensors > will do the job, The resistor and the capacitor are essential but their > values are not critical as long as the product of the R and C adds up to > about the same. > > On Sat, Apr 2, 2022 at 8:32 PM Leonardo Marsaglia <ldmarsag...@gmail.com> > wrote: > > > Well, a quick search gave me ZERO results here. The only results were at > > ar.mouser.com but mouser is not established here AFAIK, it looks like > > their > > spanish site is from Mexico. > > > > El sáb, 2 abr 2022 a las 19:15, gene heskett (<ghesk...@shentel.net>) > > escribió: > > > > > On Saturday, 2 April 2022 17:14:41 EDT Andy Pugh wrote: > > > > > On 2 Apr 2022, at 04:33, Leonardo Marsaglia <ldmarsag...@gmail.com > > > > > > > wrote: > > > > > > > > > > Well, I can try that but I recall we did a simple low pass filter > > > > > years ago > > > > This works, and is isolated. > > > > > > https://photos.google.com/share/AF1QipPXuj4R1h7P3oLpKCcGnfS-mFd-qO5nFPe > > > > > WEY-40VKkLIfDkAhSi7m4YDPVm0JCGQ/photo/AF1QipPEONYllA-BBGWD6cOLXsSWFnCU3 > > > > X27btSueFJs?key=dDNfajB5TTZDalphY2dKamtVeDdrcTRJaGZqdmZR > > > > > > And that is exactly what the doctor ordered. Thanks Andy. > > > > > > But can Leonardo src it in his reach? > > > > > > 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, 1940) > > > If we desire respect for the law, we must first make the law > respectable. > > > - Louis D. Brandeis > > > > > > > > > > > > > > > > > > _______________________________________________ > > > 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 > > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > 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
