Maybe not for CNC, but would USB-fibre -- fibre-USB cables transcend the terrible 5m limit?
On 22 April 2017 at 20:26, Linden <l...@island.net> wrote: > When I worked in the semi con industry we used to have converters for > regular rs232 serial com at 9200 bod. Was a 9 pin sub d at one end of the > adaptor then 2 glass fiber cables plugged in to the other. The receptacle > and the fiber cable were made by omron. I think the device itself was made > in Austria and grew out of some ones basement to small production. The only > problems we had were the glass fiber portion of the cables not being > crossed when some one had it apart or corrosion on the little PCB due to > exposer to HF fumes and other nasties. This was on machines designed and > built in the early 90. > > On April 22, 2017 9:56:27 AM PDT, Gene Heskett <ghesk...@shentel.net> > wrote: > >On Friday 21 April 2017 19:10:23 dave wrote: > > > >Did you get my PM to you yesterday evening? > > > >> Years ago when I thought fiber might catch-on I grabbed some 62.5/120 > >> plenum fiber at Boeing Surplus. > >> I got as far as connecting a 10-base2 card to a fiber converter > >> fishing out both ends of the fiber on the reel > >> and terminating with 3M (?) hot-melt end. It worked nicely but 10 Mhz > >> isn't straining fiber very much. The good thing about fiber is the > >low > >> error rate; something around 1E-12. I just disposed of the converters > >> a few days ago. > >> Still have several Km of fiber and a few connectors. 10-baseT works > >> just fine thru conduit buried between desktop > >> (house) and shop. About 35 m. > >> > >> Dave > > > >I found, at newark/element14, some more fiber fittings, in this case a > > > >board mount cover for a 603 sized smd led that the fiber can be plugged > > > >into, takes 2mm od fiber, snap fit in board holes, at $0.17 a copy from > > > >Bivar. Found some fiber but in 10" lengths, assembled, so still > >looking. > >The key brand name seems to be Bivar for the hardware. 603 size smd > >leds > >are similarly priced. I did find an smd phototransistor, but its target > > > >is not centered in the package. Not a major problem since I'll probably > > > >be designing the pcb, but it would be nice to use the same pcb pattern > >on both ends. Since Bivar has a phone numnber in the pdf, I'll see if > >I > >can contact them Monday. Hopefully its still a good number. > > > >> On 04/21/2017 01:53 AM, Erik Christiansen wrote: > >> > On 20.04.17 14:51, Gene Heskett wrote: > >> >> The led makers have now had 40+ years to design such a package, > >and > >> >> I fail to understand why it has not happened. > >> > > >> > Somewhere near the bottom of my junkbox is an envelope with a pair > >> > of Siemens opto-link (real product name long forgotten) devices, > >> > which came out around 35 years ago. They're small grey rectangles > >> > with through-hole pins, and a fibre entry with ring-nut (like on a > >> > collet holder) on one end. Dunno if they're still marketed, though. > >> > > >> > At Digi-key, this Broadcom offering looks just like one end: > >> > > >> > > >https://www.digikey.com/product-detail/en/broadcom-limited/SP0000638 > >> >58/516-2872-ND/2220931 > >> > > >> > But that would leave the rest of my coil of shielded twisted-pair > >> > (for RS485) cable gathering dust. With 7v of permissible > >> > common-mode, and differential transmission for noise immunity, what > >> > more is really needed? RS485 transceivers are around $2 to $3 IIRC. > >> > (I saw some for 25c today, but they were surplus stock of a now > >> > obsolete device.) > >> > > >> > Erik > >> > > >> > > >-------------------------------------------------------------------- > >> >---------- 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 > > > > > >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 > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. > ------------------------------------------------------------ > ------------------ > 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
