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Groups > comp.os.linux.misc > #95544
| From | "Carlos E.R." <robin_listas@es.invalid> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: My Computer History (Re: Is This An Old Folks Home?) |
| Date | 2026-11-12 12:57 +0100 |
| Organization | Tebibyte_Retro_Gaming |
| Message-ID | <f6mgsmxege.ln2@Telcontar.valinor> (permalink) |
| References | (7 earlier) <11cnc4c$3g7sr$1@dont-email.me> <WoRHS.510$v13.412@fx38.iad> <slrn11evu95.82s.spamtrap42@one.localnet> <284esmx8jg.ln2@Telcontar.valinor> <11d25gi$36fpm$1@dont-email.me> |
On 2026-11-11 17:35, Rich wrote: > Carlos E.R. <robin_listas@es.invalid> wrote: >> On 2026-11-08 05:23, Robert Riches wrote: >>> On 2026-11-08, Charlie Gibbs <cgibbs@kltpzyxm.invalid> wrote: >>>> On 2026-11-07, Lars Poulsen <lars@beagle-ears.com> wrote: >> >> >>> Within a few years either side of 1980, a professor in an EE class >>> told a story from early in his career. He was hired by GE to work >>> on _BIG_ (as in 8 feet to 16 feet diameter) motors and generators. >>> He said GE would hire EEs and teach them mechanical stuff, because >>> that worked better than hiring MEs and teaching them electrical >>> stuff. >>> >>> He was tasked with solving a problem with premature bearing failure. >>> When a failed machine was torn down, basically all the failed >>> bearings were found to be coated with varnish. It turns out the >>> moving parts within the bearing assembly were building up a static >>> electric charge, which would eventually arc through the oil, >>> creating a small spot of varnish. Eventually, the varnish would >>> build up, and the bearing would fail. >>> >>> The solution was to add something to the oil to make it slightly >>> conductive to electricity. Management told him he had just earned >>> his salary for his entire career--and to go do it again. >>> >>> The professor's last name was Clegg. He taught at Brigham Young >>> University. >>> >> >> There is something I don't understand. The entire machine would be >> built of metal, except the insulation on the coils. Ball bearings >> are metal, the balls are made of metal. How could the static build >> up? Maybe the oil layer was insulation enough? > > Oil functions to lubricate moving parts by forming a very thin liquid > layer between the bearing surfaces. So the actual metal of the > bearings (if the lubrication is properly maintained) never actually > make contact. The bearings "float apart" on a microscopically thin > layer of oil. Makes sense. But I never knew this for sure. > > But oil, sans additives, is an insulator, so there is also no direct > path for electrical conduction. So if the motion did build up static > charges, they would eventually arc through the oil layer. That arcing > would likely do no good for the oil in the path of the arc, so the > "convert to varnish" makes overall sense. Yep... So this probably affects all machines, right? Cars included. -- Cheers, Carlos. ES🇪🇸, EU🇪🇺;
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Is This An Old Folks Home? Farley Flud <ff@gnulinux.rocks> - 2026-11-02 23:08 +0000
Re: Is This An Old Folks Home? "Carlos E. R." <robin_listas@es.invalid> - 2026-11-03 02:51 +0100
On the on-topicness of tape drives (was: Re: Is This An Old Folks Home?) Nuno Silva <nunojsilva@invalid.invalid> - 2026-11-04 23:47 +0000
Re: On the on-topicness of tape drives Rich <rich@example.invalid> - 2026-11-05 04:14 +0000
Re: On the on-topicness of tape drives c186282 <c186282@nnada.net> - 2026-11-05 17:29 -0500
Re: On the on-topicness of tape drives Rich <rich@example.invalid> - 2026-11-05 22:52 +0000
Re: On the on-topicness of tape drives c186282 <c186282@nnada.net> - 2026-11-05 19:11 -0500
Re: On the on-topicness of tape drives Rich <rich@example.invalid> - 2026-11-06 02:41 +0000
Re: On the on-topicness of tape drives c186282 <c186282@nnada.net> - 2026-11-05 22:31 -0500
Re: On the on-topicness of tape drives Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-06 20:51 +0000
Re: On the on-topicness of tape drives rbowman <bowman@montana.com> - 2026-11-07 02:41 +0000
Re: On the on-topicness of tape drives Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 06:39 -0800
Re: On the on-topicness of tape drives rbowman <bowman@montana.com> - 2026-11-07 18:30 +0000
Re: On the on-topicness of tape drives Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 15:26 -0800
Re: On the on-topicness of tape drives rbowman <bowman@montana.com> - 2026-11-08 01:15 +0000
Re: On the on-topicness of tape drives The Natural Philosopher <tnp@invalid.invalid> - 2026-11-08 11:28 +0000
Re: On the on-topicness of tape drives rbowman <bowman@montana.com> - 2026-11-08 18:14 +0000
Re: On the on-topicness of tape drives Beej Jorgensen <beej@beej.us> - 2026-11-06 05:59 +0000
Re: Tape Drives Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-11-06 06:18 +0000
Re: Tape Drives Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2026-11-07 18:40 +0800
Re: Tape Drives Peter Flass <Peter@Iron-Spring.com> - 2026-11-07 07:33 -0700
Re: Tape Drives c186282 <c186282@nnada.net> - 2026-11-07 13:12 -0500
Re: Tape Drives "Kerr-Mudd, John" <admin@127.0.0.1> - 2026-11-08 14:32 +0000
Re: Tape Drives c186282 <c186282@nnada.net> - 2026-11-08 21:31 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-02 21:08 -0500
Re: Is This An Old Folks Home? rbowman <bowman@montana.com> - 2026-11-03 02:26 +0000
Re: Is This An Old Folks Home? Woozy Song <suzyw0ng@outlook.com> - 2026-11-04 09:55 +0800
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-03 22:14 -0500
Re: Is This An Old Folks Home? Rich <rich@example.invalid> - 2026-11-04 03:54 +0000
Re: Is This An Old Folks Home? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-04 06:21 +0000
Re: Is This An Old Folks Home? TJ <TJ@noneofyour.business> - 2026-11-05 20:40 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-05 21:52 -0500
Re: Is This An Old Folks Home? "Carlos E. R." <robin_listas@es.invalid> - 2026-11-06 14:28 +0100
My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-06 18:37 -0800
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-07 00:51 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 06:20 -0800
Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-07 07:38 -0700
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-08 02:47 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) Robert Riches <spamtrap42@jacob21819.net> - 2026-11-08 04:23 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-08 05:00 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-08 20:50 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-09 03:53 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-10 15:06 +0100
Re: My Computer History (Re: Is This An Old Folks Home?) rbowman <bowman@montana.com> - 2026-11-10 19:11 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-10 23:04 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-10 15:01 +0100
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-10 22:45 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-11 13:38 +0100
Re: My Computer History (Re: Is This An Old Folks Home?) Robert Riches <spamtrap42@jacob21819.net> - 2026-11-11 15:09 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-12 12:57 +0100
Re: My Computer History (Re: Is This An Old Folks Home?) Rich <rich@example.invalid> - 2026-11-11 16:35 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-12 12:57 +0100
Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-07 07:31 -0700
Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-07 06:52 -0800
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-07 20:09 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Thomas Koenig <tkoenig@netcologne.de> - 2026-11-08 08:08 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-08 21:24 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-08 18:34 -0800
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-08 22:54 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-09 04:39 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:08 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 02:25 +0000
Re: My Computer History Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-11-10 02:32 +0000
Re: My Computer History c186282 <c186282@nnada.net> - 2026-11-09 23:07 -0500
Re: My Computer History Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 18:36 +0000
Re: My Computer History rbowman <bowman@montana.com> - 2026-11-10 19:15 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 22:49 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Lars Poulsen <lars@beagle-ears.com> - 2026-11-10 06:03 -0800
Re: My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 18:36 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) scott@slp53.sl.home (Scott Lurndal) - 2026-11-10 15:08 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-10 23:36 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-09 07:29 -0700
Re: My Computer History (Re: Is This An Old Folks Home?) The Natural Philosopher <tnp@invalid.invalid> - 2026-11-09 16:11 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:19 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Bob Eager <throwaway0008@eager.cx> - 2026-11-10 14:31 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-10 23:21 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Bob Eager <throwaway0008@eager.cx> - 2026-11-11 12:11 +0000
Re: My Computer History (Re: Is This An Old Folks Home?) Lynn Wheeler <lynn@garlic.com> - 2026-11-09 07:48 -1000
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:55 -0500
Re: My Computer History (Re: Is This An Old Folks Home?) Peter Flass <Peter@Iron-Spring.com> - 2026-11-09 21:35 -0700
Re: My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-10 21:32 -0500
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) John Levine <johnl@taugh.com> - 2026-11-09 16:56 +0000
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-09 21:46 -0500
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) Robert Riches <spamtrap42@jacob21819.net> - 2026-11-10 18:06 +0000
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-11-10 18:45 +0000
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-12 13:00 +0100
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) c186282 <c186282@nnada.net> - 2026-11-11 00:03 -0500
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) "Carlos E.R." <robin_listas@es.invalid> - 2026-11-12 13:04 +0100
Re: spooling, My Computer History (Re: Is This An Old Folks Home?) John Levine <johnl@taugh.com> - 2026-11-10 19:26 +0000
Re: Is This An Old Folks Home? Beej Jorgensen <beej@beej.us> - 2026-11-04 19:15 +0000
Re: Is This An Old Folks Home? Farley Flud <ff@gnulinux.rocks> - 2026-11-04 20:38 +0000
Re: Is This An Old Folks Home? Nuno Silva <nunojsilva@invalid.invalid> - 2026-11-04 23:51 +0000
Re: Is This An Old Folks Home? "s|b" <me@privacy.invalid> - 2026-11-05 17:48 +0100
Re: Is This An Old Folks Home? Robert Riches <spamtrap42@jacob21819.net> - 2026-11-05 16:56 +0000
Re: Is This An Old Folks Home? The Natural Philosopher <tnp@invalid.invalid> - 2026-11-05 20:55 +0000
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-06 12:23 -0500
Re: Is This An Old Folks Home? Farley Flud <ff@gnulinux.rocks> - 2026-11-06 19:25 +0000
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-06 15:59 -0500
Re: Is This An Old Folks Home? rbowman <bowman@montana.com> - 2026-11-07 02:50 +0000
Re: Is This An Old Folks Home? Nuno Silva <nunojsilva@invalid.invalid> - 2026-11-07 09:03 +0000
Re: Is This An Old Folks Home? rbowman <bowman@montana.com> - 2026-11-07 18:01 +0000
Re: Is This An Old Folks Home? The Natural Philosopher <tnp@invalid.invalid> - 2026-11-07 21:55 +0000
Re: Is This An Old Folks Home? rbowman <bowman@montana.com> - 2026-11-08 01:01 +0000
Re: Is This An Old Folks Home? "Carlos E.R." <robin_listas@es.invalid> - 2026-11-12 12:43 +0100
Re: Is This An Old Folks Home? L Thorpe <lt666@sixsixsix.net> - 2026-11-07 18:31 +0000
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-07 13:39 -0500
Re: Is This An Old Folks Home? L Thorpe <lt666@sixsixsix.net> - 2026-11-07 19:07 +0000
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-07 14:30 -0500
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-07 13:01 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-07 15:54 -0500
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-08 00:33 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-08 21:05 -0500
Re: Is This An Old Folks Home? "Joel W. Crump" <joelcrump@gmail.com> - 2026-11-10 05:30 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-10 22:03 -0500
Re: Is This An Old Folks Home? c186282 <c186282@nnada.net> - 2026-11-06 23:00 -0500
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