On Saturday 11 March 2017 17:01:23 Peter C. Wallace wrote: > On Sat, 11 Mar 2017, Gene Heskett wrote: > > Date: Sat, 11 Mar 2017 16:53:28 -0500 > > From: Gene Heskett <[email protected]> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <[email protected]> > > To: "Enhanced Machine Controller (EMC)" > > <[email protected]> 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 > Its all on a star circuit now, using 1/4" tinned braid. I don't think theres any excessive bounce left. I have enough modules left to make it work, and I have one more card yet, so I guess I'll "wait for the other shoe".
Thanks Peter. > > -- > > "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 > > [email protected] > > 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 > [email protected] > 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> ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
