On Saturday 08 April 2017 19:42:26 Jon Elson wrote: > On 04/08/2017 01:51 PM, Gene Heskett wrote: > > I need to go to tsc or somewhere, wallies maybe, and get > > me some of those 3 to 2 electrical adaptors as I just > > found my gigahertz sampler scopes 3rd wire ground pin is > > .2 ohms from a damned probe ground lead, so just hooking > > up a ground lead is making a ground loop. I may even just > > uncover the darned thing and see if I can find the jumper > > and cut it. What the hell were they thinking? > > The problem with that is they used to have line filters with > huge caps to line and neutral, and you'd get knocked on your > rear if you touched a scope with an isolated ground and > anything else. You could even get sparks off the ground clip. > Not sure your current scope has such a filter, but if so, > beware when using it isolated. > > Jon > That consideration has indeed crossed my mind, Jon, so before I make it permanent, that will be checked. Those honking big line bypass caps have tossed me around a bit in the last 70 years. Not the most pleasant feeling...
On the lcnc joint errors front, I unplugged the cat-6 and hdmi video to the monitor cables, pulled them out of the holes in the bottom of the box, and took them back to the pi from an overhead direction, putting 15" of air between the cables and the noise from the stepper drivers. It had, the last time I checked 15 minutes back, made 45 copies of lathe_pawn.ngc w/o a joint error. So I guess I go prowling about fleabay for a separate box to put whats now on the inside of the door in this too small a box. If I close the door, the whole maryann will be too close to the noisemakers. But I think its progress. Thank you Jon. 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
