On Friday 07 October 2016 19:05:56 Gene Heskett wrote: > Greetings to PCW; > > I have a 2nd apparent failure of a 5i25, affecting the same p3-15 pin. > So I am suspecting I have a bad BoB or home rolled cable. > > I have a perfectly good 4.77 volts at the BoB's input, which does go > to ground if I touch the wire to the machine frame, but it is not > getting thru the BoB and the 5i25 to motion.probe-input. > > How hard is it to setup a 3rd port, using the parport in the computer, > so I could move the cable to the parport long enough to verify it is, > or isn't, the 5i25. > > Unlike the first time when I thought I had blown that pin on the 5i25 > because there wasn't a solid ground on the machine frame, this time > there is zero volts dc on the machine frame, and less than 1 millivolt > of AC with the motors all moving, So I do have a good ground now. And > I have cable and connectors enough to make a new cable. And I've > another BoB because I bought two for the Sheldon. So somewhere in > this briarpatch is a fix. Changing the BoB would be a PIMA because > while the old on is pretty much straight thru, the 2 new ones I have > are hopelessly scrambled. > > Is that parport tester in the docs standalone? If yes, that should > sort this quite a bit faster. Just move the cable to the parport and > test away. > > Things to check other than what I just listed? > > That teflon rod, with a piece of 10 gauge copper for the probe is > together and looks like it will work well with my hole finder routine. > > But first I need to actually make a G38.2 work. > > Thanks Peter. > > Cheers, Gene Heskett
I think I found it. I put another cable and bob on that 5i25 socket, worked. Looking at the male to male I had to use with that hacked up BOB, I could see it was 10 or 15 thou from being fully crimped, so another few pinches with the vice and it seems to have a solid connection now. I suspect there is nothing wrong with the 5i25 I took out from the first time it failed. So back to the grindstone with this current project. I don't really like that particular male IDC, it did not come with the cable clamping top. Thanks all for bearing with me. 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> ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
