Hello again guys, Well, I can confirm the encoders communicate with the control using serial interface. I have some heidenhain ERN471 encoders that I could adapt in case these can't communicate with LCNC, so that shouldn't be a problem. My main concern now is to interface all of this with the Mesa boards I have and maybe purchase a couple of 8i20 to drive these motors.
By the way, should I open a new topic for this? El mar, 5 dic 2023 a las 17:07, Todd Zuercher (<to...@pgrahamdunn.com>) escribió: > I think all Fanuc red cap encoders are digital. The question marks are if > the coms signal is differential quadrature or serial and if serial what > format, and what the commutation tracks/signals are or if they are rolled > into the absolute encoder serial signal. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: gene heskett <ghesk...@shentel.net> > Sent: Tuesday, December 05, 2023 11:52 AM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] OT Fanuc ot-c cpu power supply A16B-1212-0950 > > [EXTERNAL EMAIL] Be sure links are safe. > > On 12/5/23 08:17, Leonardo Marsaglia wrote: > > Hello guys, and thanks for all the replies! > > > > Well, we swapped the majority of the capacitors on the board and we > > still get the alarm on the PSU. I'm almost inclined to consider this a > > LCNC project and start doing the conversion. > > > > One thing I'm considering before doing that is if It's possible to use > > the original Fanuc Servo motors replacing only the drives. I know the > > drives will not be usable because they communicate with their own > > Fanuc serial protocol, but maybe there's a chance I can use the same > motors. > > > > I'm attaching a picture of the X axis motor so you can see. I guess it > > should be possible to control it, but I don't really know how the > > encoder works. I know there's a Hostmot encoder module for Fanuc but I > > don't know anything about them so swapping the servo motors is another > > option too. I have several servo motors here just in case this happened > so I can use them. > > > That looks like the output stage of a 7.5 horse vfd could drive it. A > PID's error voltage might be used to control the driving current, much like > the current crop of smaller 3 phase stepper drivers we have already, like > the LCDA357H but with much higher rated output devices since that one has a > 50 volt, 4 or 5 amp limit. Give me enough time I could figure that out but > someone probably has already. I'm sure you could move it weakly, laying on > the table, with an LCDA357H, a function generator to make steps, a switch > to control direction and a 42 volt power supply. A proof of concept test. > You would have to find its encoder on the connector though, because w/o the > encoder, the LCDA357H will see an error and shut down on the first step. A > schematic of the connector and description of the encoder would be VERY > helpful. The LCDA357H is designed for quadrature encoders (optical) but > sin/cos magnetic analog types are a different game. The motor itself looks > to be a std 3 phase motor. My bet is the encoder is an analog sin/cos type > needing a carrier frequency drive. In which case the digital encoder input > on the likes of the LCDA357H is worthless. So the encoder is the > $64,000 question. Which is it? > > > Thanks again a lot for your help guys! Sorry that I don't reply > > individually :) > > > > El dom, 3 dic 2023 a las 9:00, gene heskett (<ghesk...@shentel.net>) > > escribió: > > > >> On 12/3/23 04:42, Roland Jollivet wrote: > >>> If you can obtain/borrow any thermal imaging device, then run with > >>> the > >> PSU > >>> with covers off and check every 5min. You should identify a > >>> cap-thermal problem. > >>> > >> For that, a $500 ir imager would be nice, but a $29 ir thermometer > >> from the local lumber yard can do as well. Leonardo might even have > >> one of those in his toolbox, if only to check his food for adequate > >> cooking. I do. When I'm on the road, living out of the fridge and > >> microwave of a motel room. > >>> > >>> > >>> On Sat, 2 Dec 2023 at 21:14, John Dammeyer <jo...@autoartisans.com> > >> wrote: > >>> > >>>>> From: Chris Albertson [mailto:albertson.ch...@gmail.com] > >>>>> > >>>>> If it is a simple linear power supply, yes they are very easy to > >>>>> debug > >>>> and > >>>>> repair, LIkey it is the caps. > >>>>> > >>>>> But switching power supplies are much harder to debug, You can > >>>>> guess it might be the same issue but these have dozens of parts that > can fail.. > >>>> In any > >>>>> case, the cost to repair is small. > >>>>> > >>>> > >>>> I disagree. Switching power supplies are way more likely to fail > >>>> from high ESR. That the system runs for a short while and then > >>>> fails is > >> again a > >>>> symptom of a capacitor overheating due to high ESR. Or the voltage > >>>> is right on the edge and as the cap warms up the heat results in a > >>>> change > >> that > >>>> results in the power supply moving out of spec. There may even be > >> enough > >>>> heat developed on the board that a solder joint becomes unreliable. > >>>> > >>>> In the past even PC motherboards have been repaired by a wholesale > >>>> swap > >> of > >>>> the electrolytics. > >>>> > >>>> So what I would do is an initial survey of the electrolytic > >>>> capacitors inside the power supply and order a set. That way the > >>>> machine can still run for an hour or so a day while you wait for > parts from a reputable > >>>> source. Then replace the capacitor when they arrive. That won't > >> prevent > >>>> the power supply from working again and it may well fix the 1 to 2 > >>>> hour failure period. In either case $30 or so worth of caps is cheap. > >>>> John > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> Emc-users mailing list > >>>> Emc-users@lists.sourceforge.net > >>>> https://l/ > >>>> ists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7C > >>>> toddz%40pgrahamdunn.com%7C7fec52bb449e48dca0bf08dbf5b2b254%7C575854 > >>>> 4c573f47cebee96c3e0806fb43%7C0%7C0%7C638373920085440908%7CUnknown%7 > >>>> CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLC > >>>> JXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=4q0NEyFazIVvuKljPpWH3OxAL6W6IlyY > >>>> DPKsqFlCu64%3D&reserved=0 > >>>> > >>> > >>> _______________________________________________ > >>> Emc-users mailing list > >>> Emc-users@lists.sourceforge.net > >>> https://li/ > >>> sts.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Cto > >>> ddz%40pgrahamdunn.com%7C7fec52bb449e48dca0bf08dbf5b2b254%7C5758544c5 > >>> 73f47cebee96c3e0806fb43%7C0%7C0%7C638373920085440908%7CUnknown%7CTWF > >>> pbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI > >>> 6Mn0%3D%7C3000%7C%7C%7C&sdata=4q0NEyFazIVvuKljPpWH3OxAL6W6IlyYDPKsqF > >>> lCu64%3D&reserved=0 > >>> . > >> > >> 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://lis/ > >> ts.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Ctodd > >> z%40pgrahamdunn.com%7C7fec52bb449e48dca0bf08dbf5b2b254%7C5758544c573f > >> 47cebee96c3e0806fb43%7C0%7C0%7C638373920085440908%7CUnknown%7CTWFpbGZ > >> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0% > >> 3D%7C3000%7C%7C%7C&sdata=4q0NEyFazIVvuKljPpWH3OxAL6W6IlyYDPKsqFlCu64% > >> 3D&reserved=0 > >> > >> > >> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lis/ > >> ts.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Ctodd > >> z%40pgrahamdunn.com%7C7fec52bb449e48dca0bf08dbf5b2b254%7C5758544c573f > >> 47cebee96c3e0806fb43%7C0%7C0%7C638373920085440908%7CUnknown%7CTWFpbGZ > >> sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0% > >> 3D%7C3000%7C%7C%7C&sdata=4q0NEyFazIVvuKljPpWH3OxAL6W6IlyYDPKsqFlCu64% > >> 3D&reserved=0 > > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
