Hi When you said wide pin, Do you mean pin that looks like round /cylindrical shape? And there also 2 flat shape pins.
On Mar 23, 2018 3:00 PM, "Gene Heskett" <ghesk...@shentel.net> wrote: > On Friday 23 March 2018 17:04:51 a k wrote: > > > hi > > i reassemble my lcnc mill, and i found that axis move by them self. > > i think it is something to do with static electricity. > > i found ground - and when grounded lcnc body of machine - breaker turn > > off. i measure with dc voltage between machine and ground 2. vdc and > > when i measure ac voltage between lcnc machine and ground it was 35 v > > AC. > > > > i know that when use real ground like a water pipe and ground in > > outlet there always will be current they always be 30 v ac. > > can it cause problem? > > > Yes, probably by blowing "pins" on the interface card. Most of this stuff > is 5 volt, or 3.3 volt. 30 volts will blow it. > > You either do not have a useable static ground on your machine or its > wired wrong, machine or building to be determined. I've had to correct a > goodly number of so-called static grounds made up by a carpenter that > knew nothing about the NEC code book and treated them as > interchangeable. > > Static grounds are to be bridged to powerline neutral ONLY at the > building service entrance according to our NEC. If you are not capable, > get an electrician who is. There is no shame in doing so. > > Basically, with that single connection opened in the service, and the > building entrance breaker opened, there should be no continuity between > the static ground and anything that is the wide pin of a wall socket, or > to an earthen ground. The building, if you have continuity to the narrow > pin of a wall socket, make sure everything is turned off first, but the > person who wired it, maybe 40+ years ago, is color blind. And you stand > a good chance of being shocked, or worse... > > Connected back up, but the breaker still off, you should get not more > than an ohm, maybe 2 ohms, between the static ground and the neutral > (wide pin) of a wall socket, any and all places in the building. > > Good luck. > > > thanks > > aram > > ---------------------------------------------------------------------- > >-------- Check out the vibrant tech community on one of the world's > > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -- > 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) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
