I still think it's ground related. Are these DC motors?
If they run outside the box ok, then the frame of the motor is relevant. If they are DC, then carbon dust inside the motor could be conducting to the grounded? case, causing problems. On 26 March 2018 at 04:11, a k <[email protected]> wrote: > Hi > I did check wiring. > It was same as when machine work last time 8 month ago. > I did remove all 3 motor drive from inside aluminum box and mount them on > outside wall of same aluminum . > Result. > All axis working good. No uncontrollable motion of axis. > > Maybe problem is that drive generate magnetic field that like induction > create current on metallic box? > I am using linze motor drive. I have them from 2004. > Besides that they do not like to be inside metal box no problem for 14 > years. > > I will make box from plywood . And see result. > > > > > > > > > > > > On Mar 25, 2018 5:29 PM, "Gene Heskett" <[email protected]> wrote: > > On Sunday 25 March 2018 15:02:45 John Kasunich wrote: > > > On Sat, Mar 24, 2018, at 5:54 PM, a k wrote: > > > I use small tester. > > Which does not tell us a thing about what it can measure, please relate > the make and model as some of us might recognize it. > > > > I measure supply 120 v ac. > > Thats another problem, the std line voltage has been 127 volts for > several decades. I would at least compare what this one reads against a > known good meter, because either your building wiring is wonkie, or that > meter belongs in the trashbin, thats about a 5% error. > > > > Meter works. > > I won't give it credit for being accurate. > > > > Axis was moving by them self. > > > > THIS: > > > Touch box with real ground and breaker turn off. > > > > Means you have something screwed up. > > > > STOP and figure out what it is before you kill yourself or someone > > else. > > I'll second this. You have a serious, potentially lethal problem. Please > get someone in there who can find and fix it. We aren't interested in > reading about you in the obit columns of the local papers. > > > > Between box and real ground tester read 30 v ac > > > > Maybe that means your wiring error is on the secondary side of your > > power supply transformer. > > > > -- > 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 > [email protected] > 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
