> > Wrong atribution Leonardo. It was posted by Andrew Beck, I was just > commenting that it appears Andrew was overdriving the motors a bit. >
That's ok Gene :) I just wanted to clarify because some older Fanuc spindle drives (the mazak that's from 1983 had one of those) worked with 0-10 volts for speed command and are easy to replace. But these apparently are not that friendly. I would love to install LCNC on this lathe like on any machine, but that would take several weeks easily so It's not the happiest option at the moment. El mar, 13 jun 2023 a las 1:05, gene heskett (<ghesk...@shentel.net>) escribió: > On 6/12/23 22:58, Leonardo Marsaglia wrote: > > Guys, just to clarify, the control is still Fanuc, not LCNC. So I need to > > interface with the Fanuc control. Also, the drives on this lathe are all > > using serial communications (the lathe is from 1997) so I think it's not > > that easy to replace an original drive for a non Fanuc one. That's why > I'm > > just hoping there's some kind of interface to convert the signals from/to > > the fanuc control to use a standard VFD. If not, I guess I'll have to > > replace the drive entirely and try to repair the one that's not working > > without the rush of getting the machine working again. > > > > El lun, 12 jun 2023 a las 17:36, gene heskett (<ghesk...@shentel.net>) > > escribió: > > > > Wrong atribution Leonardo. It was posted by Andrew Beck, I was just > commenting that it appears Andrew was overdriving the motors a bit. > > >> On 6/12/23 15:58, andrew beck wrote: > >>> Leon I use a cheap Chinese vfd costs about 190usd > >>> > >>> And buy a encoder for it. About 50usd and I'm controlling two fanuc > >>> spindle motors here fine. > >>> > >>> They auto tuned the motor in about 4 secs and run awesome. > >>> > >>> I can get 150 percent torque at zero rpm. If I run a pid loop in > >> linuxcnc > >>> almost a servo level control response > >>> > >>> Have a look at the video there are links on there. I made it a few > >> months > >>> ago > >>> > >>> https://youtu.be/vARlybdtC6Q > >>> > >>> I'll message you in WhatsApp too. > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > did you get that msg? > >>> > >>> On Tue, 13 Jun 2023, 07:40 Leonardo Marsaglia, <ldmarsag...@gmail.com> > >>> wrote: > >>> > >>>> Forgot to attach a picture of the label on the spindle drive. Sorry. > >>>> > >>>> El lun, 12 jun 2023 a las 16:33, Leonardo Marsaglia (< > >>>> ldmarsag...@gmail.com>) > >>>> escribió: > >>>> > >>>>> Hi guys, I hope you're all doing well > >>>>> > >>>>> Sorry for the OT but we have a problem with a Daewoo lathe and as > >> always > >>>>> this is the first place I think of. > >>>>> > >>>>> So, this morning the lathe started up as always, but when we selected > >> the > >>>>> gear to validate the spindle movement the screen showed a 409 SERVO > >> ALARM > >>>>> and the spindle drive on the back was showing alarm number 12. From > >> what > >>>> I > >>>>> could find on several forums this is an overload alarm and in the > worst > >>>>> case scenario the IGBT firing module or the IGBT module itself could > be > >>>>> damaged. > >>>>> > >>>>> Is there any way to check this in an easy manner? > >>>>> > >>>>> Also, is it possible to adapt a normal VFD in case this is the > >> problem? > >>>>> Because maybe there are some Fanuc Serial protocol to analog voltage > >>>>> converters (I'm just wishing such an adapter exists) that could be > >> used. > >>>>> > >>>>> Thanks as always for your help! > >>>>> > >>>>> Leonardo > >>>>> > >> Might be ok for short term operation, Leonardo, but 150% at zero rpm > >> tells me the vfd's max low speed boost exceeds the motors FLA, aka Full > >> Load Amps. The vfd should have a variable to fix that. Most do > >> anyway.. Also, most vfd's will have a minimum hz setting which should > >> turn off the drive below around 10% of 60 hz. I have mine set to > >> disable at 5hz. I can do 5.5 for half an hour and still lay my hand on > >> the motor w/o burning it. Who needs a backgear? > >>>> _______________________________________________ > >>>> 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 > >> > >> 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 > >> Genes Web page <http://geneslinuxbox.net:6309/> > >> > >> > >> > >> _______________________________________________ > >> 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 > > 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 > Genes Web page <http://geneslinuxbox.net:6309/> > > > > _______________________________________________ > 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
