On Saturday, October 08, 2011 04:42:00 PM Chris Radek did opine: > On Fri, Oct 07, 2011 at 08:48:33PM -0700, Bruce Klawiter wrote: > > The machine did not dither or do the jerking with the old Anilam > > control.Someone said the axis might be drifting then snap back into > > position, I put an indicator on an axis and it holds position and when > > it jerks it moves about .002" out of position then back, hard to tell > > it so fast. > > That's really weird, and sounds more sinister than noise on the > encoder signals. > I have the SWAG that the OP doesn't have a true star ground system, and the pop machine is creating a minor pulse when its compressor starts.
Weird story time. Many years ago, when a major employer in Clarksburg closed suddenly, we at the tv station went to a food collection & distribution mode for several months. In doing this, we went hat in hand to several of the local dairy and such distributors, asking for the loan of any spare freezer capacity they had. One company loaned us a 30 foot chest freezer of unknown age, but fairly ancient. We lined up all the loaner freezers along the outside of the studio wall and plugged then into the NEC required duplexes along the wall. Every thing was fine till we turned on the cameras to do the 5:30 news & found about 4 volts worth of 60 hz superimposed on the normally 1 volt video from the cameras. In a scramble while we played PSA's non- stop, I started unplugging freezers since that was the only thing that had been changed that day. I got to that 30 footer and bam, all clear the instant it was unplugged. Since there was by then donated food in all of them, we first cleared that box out to the others as room allowed and plugged the others back in. The first thing I noted when we spun it around was that it wasn't trailing a factory line cord. Getting out a meter, I quickly found that the narrow blade was ringable to the 3rd pin, and that the wide blade was ringable to the freezer cabinet. So I first opened the cap on the end of the cord, only to find that it was actually scrambled even worse. So I put that back according to the color code, which then connected the narrow pin to the freezer cabinet. Going to the other end of this 'line cord' I found that it had been spliced into the box wiring, apparently by someone totally color blind. And there weren't any wire nuts in sight, just twisted together and taped. And it looked as if it had been that way for at least a decade. So if you do not personally know that every device plugged in is properly wired, start by unplugging things, even the ones you just "know" are correct. I've found one of those pocket hot wire sniffer/beepers gizmo's to be extremely handy. It has managed to keep me alive several times. Because, as the above story amply demo's, they live among us, and they even breed! Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Slow day. Practice crawling. ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
