In bringing this thing slowly back to life, I found a goodly bit of the noise this evening.
In the process of adding my single bolt ground, I had grounded the Z drives - rail from the psu by putting a 3" piece of wire that was handy leftovers, in the - rail of the driver, then clipped it to a run of braid about 4" from the bolt. Totally bad dog as it was injecting about 2.5 volts of noise into the run of braid headed for the lid of the box and the 7i90 & pi lived. I had a stray wire about that same length sticking off the bolt, so I wire nutted those two together. 2.5 volts of noise all over the lid stuff became 300 mv. Thinking about that after the fact, I am wondering if an even better idea might be to put a pair of .1 mylars in series across the drivers power rail inputs, and take the junction of the two caps down to that bolt. Balancing the line so to speak. Comments? So now I am down to hooking it all back up. But I am having a heck of a time making good crimps that will plug into the 10 pair plastic headers. The tool mostly works although its leaving the pin squeezed a bit wide where the crimp is, and that makes it hell to get it pushed into the header plug, but theres no place to grip the female pin and crimp it at the same time. But I'm slowly learning how to partially close the crimper so it sort of gets a grip on the pin, and then insert the wire. Need younger, less arthritic fingers I think. :) But tomorrow should get me back to where I was 10 days ago. With home & limit switches yet to install. 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
