On Friday 13 November 2020 11:14:24 Gene Heskett wrote: > Greetings all; > > I, despite seeingthe signals on the bobs input leds just fine, am not > seeing them at all the inputs to encoder.01 in the 5i25. And I just > made that 5' cable a month ago. > > IDC crap. I have a 100 ft roll of Belden ribbon cable thats now about > 15 years old, unused portion still in the Belden box. But apparently > either the blue amphenol db25, or the black hirose 26 pin header > connectors, both gold flashed, are crap. Or the cable has been gnawed > in two, without leaving a mark on it. > > Where are you guys buying /known good/ cable and connectors these > days? > I found it, but its crazy. Somehow, in the db25 on the rear of that board, it had collected a hardened, yellow film on pins 12 & 13. Some carb cleaner and a lot of scraping finally got down to the metal and a good connection.
But now I need advice. The current pid.a.feedback (this was formerly a stepgen driven axis) should be obtained from the encoder, which produces a group of outputs. and here I am assuming the position is whats fed back to the pid as feedback. I can "net" that up easily enough to obtain a static position. But are there other advantages to using the encoders velocity outout. What about the pid's FF inputs? IOW, where can I find a tut that explains all this? I have skimmed our Documentation.pdf, and our wiki, without finding any obvious examples. you could say, with some truthfullness, that we are oriented to stepper driven machines. Thank you. > > Cheers, Gene Heskett 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
