Are the shielded wires only grounded at one end and at the controller end? On Sun, Mar 15, 2015 at 1:22 PM, Karlsson & Wang < nicklas.karls...@karlssonwang.se> wrote:
> I think grounding is the most important. There are normally a common mode > voltage at the inverter output to motor so the inverter power ground will > bounce around each time inverter is switched. If this bouncing is coupled > to the logic ground there may be a lot of problems. > > Nicklas Karlsson > > > > > On Sun, 15 Mar 2015 14:39:24 +0000 (GMT) > russ...@lls.lls.com (Russell Brown) wrote: > > > > > I promised to report back so... > > > > I fitted the filter (Schaffner FN2030 Series 16A 250 V ac 400Hz) on the > > VFD mains input and that did make a difference. My failing case job ran > > 70% of the way through where without it the job failed 10% in. Not the > > complete solution though. > > > > I then tried a ferrite core (mains clipon stylee) on the input of the > > field power supply. No difference. A ferrite core (ring with both > > wires looped through it a couple of times) on the output of the 12V > > field power made no difference either. > > > > A ferrite core (ring as above) on the limit switch wires fitted at the > > Mesa end made no difference either. > > > > So... finally I replaced the limit switch wires with shielded cable > > (grounded only at the Mesa end). That seemed to do the final trick and > > the job ran all the way through. > > > > Of course I don't know if this is a 100% fix or just enough to get > > through my failing case (other jobs without all the above have run > > fine). I guess time will tell. > > > > Hope that's useful for someone. > > > > -- > > Regards, > > Russell > > -------------------------------------------------------------------- > > | Russell Brown | MAIL: russ...@lls.com PHONE: 01780 471800 | > > | Lady Lodge Systems | WWW Work: http://www.lls.com | > > | Peterborough, England | WWW Play: http://www.ruffle.me.uk | > > -------------------------------------------------------------------- > > > > > ------------------------------------------------------------------------------ > > Dive into the World of Parallel Programming The Go Parallel Website, > sponsored > > by Intel and developed in partnership with Slashdot Media, is your hub > for all > > things parallel software development, from weekly thought leadership > blogs to > > news, videos, case studies, tutorials and more. Take a look and join the > > conversation now. http://goparallel.sourceforge.net/ > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming The Go Parallel Website, > sponsored > by Intel and developed in partnership with Slashdot Media, is your hub for > all > things parallel software development, from weekly thought leadership blogs > to > news, videos, case studies, tutorials and more. Take a look and join the > conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
