On Sat, 11 Mar 2017, Gene Heskett wrote: > Date: Sat, 11 Mar 2017 16:53:28 -0500 > From: Gene Heskett <ghesk...@shentel.net> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: [Emc-users] for PCW > > Greetings Peter; > > I just ran into a 2nd dead module on this 7i90, encoder 2 says everything > is true/high. So I switched the wires & code to use encoder 3, for > Z-jog, and which its not all hooked up yet in the hal file, it works > fine so far. > > I bought me a pair of the static straps, and have not touched that card > w/o clipping on. Stepgen 2 was dead on the initial power-up. And now an > encoder-02 is DOA although the login/registration trace at LCNC startup > looks perfectly normal. > > What can be destroying it now? > > Thanks Peter. > > Cheers, Gene Heskett
Usually grounding issues Any input swings with unlimited current > about 7V or < about -0.5V may destroy the FPGAs input (+voltages tend to kill the bus switches, -voltages the FPGA) Unlimited currents -0.5V are easy to generate if you have grounding issues > -- > "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> > > ------------------------------------------------------------------------------ > Announcing the Oxford Dictionaries API! The API offers world-renowned > dictionary content that is easy and intuitive to access. Sign up for an > account today to start using our lexical data to power your apps and > projects. Get started today and enter our developer competition. > http://sdm.link/oxford > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! The API offers world-renowned dictionary content that is easy and intuitive to access. Sign up for an account today to start using our lexical data to power your apps and projects. Get started today and enter our developer competition. http://sdm.link/oxford _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
