On Friday 13 November 2020 20:45:39 dave engvall wrote: > For all the time spent chasing cable problems it might be nice to have > a chip on a board that would echo signals and generate error messages. > Without good diagnostics one is like the puppy chasing his tail. > > Dave
While I agree, it wouldn't have found this. Only an optical inspection found it, after discovering that it worked with the db25 just barely plugged in. And I've 2 more breakouts ordered, but I have a feeling that is also a waste of time and I'm going to have to build a board to buffer and power boost the encoder signals. By the time they get here, I should have the motor mounts made and installed. The driver works great, now I have to convince hal to make it a good stiff servo. :) [...] > >> We use AMP/TYCO connectors and 3M cable and have basically 0 > >> problems If you plug/unplug the cable frequently, you should use > >> the strain reliefs or the first and last wires in the cable tend to > >> get broken. > >> > >> Peter Wallace > >> Mesa Electronics > > > > Thank you Peter. I found a coat of what might have been paint or > > something similar on pins 12-13 of the bobs rear socket. Chiseled it > > off and washed it out with some carb cleaner spray, its working or > > was. The bob inputs suddenly acted as if they had a.1 cap to ground, > > on all of them, changed the bob for a new but it didn't help. > > Disconnected from the bob, the encoder has about a 2 microsecond > > rise and fall times, 5 volt rail to rail swings, excellent > > quadrature, but hook it up and get instant quad error. I've one more > > bob yet, but changing it is an hour plus chore. But its a different > > version, db25 moved left about half an inch. I'd have to dis about > > 12 other connectors just to take the back panel off and mill the > > slot wider. Either that or remove the standoffs and mount it via > > the connector ears. > > > > Some days it don't pay to gnaw thru the straps to get up and p. > > > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > Cheers, Gene Heskett > > _______________________________________________ > 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
