Peter, I tried grounding several different ways. Made no difference. See if this is a clue. I have one 7i43 for development, with the USB connector, the rest (-P) use an external 5V supply. I plugged in the development board powered by USB. The TRAM error no longer appears, but it does seem to stop communicating with the 7i43. When this happens I lose lock and hold (using servos), and if running at the time, get a following error. Cannot re-enable amplifiers without doing a reboot.
Any ideas? I do have a new motherboard on order. Thanks, Eric On February 8, 2018 12:27:27 PM EST, "Peter C. Wallace" <p...@mesanet.com> wrote: >On Thu, 8 Feb 2018, Eric H. Johnson wrote: > >> Date: Thu, 8 Feb 2018 11:51:24 -0500 >> From: Eric H. Johnson <ejohn...@camalytics.com> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "'Enhanced Machine Controller (EMC)'" ><emc-users@lists.sourceforge.net> >> Subject: Re: [Emc-users] Mesa 7i43 TRAM error >> >> Peter, >> >> Voltage to the card is 4.97V. The cable length is 2'. I had a spare, >but the >> same length. Swapped anyway and getting basically the same thing. A >PITA >> because it usually takes 1-3 hours for the error to occur after a >cold >> start. I am not seeing anything shorter than 3' on the Mesa Price >list. The >> distance in the panel between the parallel port on the computer and >the 7i43 >> is easily less than 1'. This computer still has a DB25, but the new >> motherboards I have use just a female header on the motherboard side >too. >> There must be an adapter that goes to a female DB25. >> >> Is 2' still too much or is the problem elsewhere? >> >> Thanks, >> Eric > > >It might be if there is a ground loop so there is significant high >frequency >current flowing through the cable ground pins. > >One thing to try is to use a very short ( 3" or so ) heavy wire between >the PC >case ground and the 7I43 Ground (just as a test) to shunt any ground >currents >flowing through the EPP cable. > > > >> >> >> I would check that the 7I43s 5V power is OK and maybe try a shortened >EPP >> cable. A TRAM error means the EPP handshake failed (sort of like the >card >> reset or totallly lost communications somehow ) >> >> >> >> >> >------------------------------------------------------------------------------ >> 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 >> > >Peter Wallace >Mesa Electronics > >(\__/) >(='.'=) This is Bunny. Copy and paste bunny into your >(")_(") signature to help him gain world domination. > > >------------------------------------------------------------------------------ >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
