On Sunday, October 16, 2011 07:35:11 AM Bruce Klawiter did opine: > >Yup, that is a concern. The fact that his Z axis appears to have > >abnormal transients even when disconnected from any command input at > >the >same time the X has similar transients seems to indicate a ground > >loop **IS** to >blame for this. There should be NO WAY that two > >amplifiers should have this >kind of transient at the same time. When > >disconnected from the command >source (the PPMC DAC board in this > >case) then the only connections I see are >the +/- 15 V analog supply > >to the servo amps and the motor power supply, and >the system ground. > >Somehow, something is being communicated between the >X and Z amp that > >shouldn't be. > > > >Jon > > I may not be understanding this, when you say the "The fact that his Z > axis appears to have abnormal transients even when disconnected from > any command input" are you saying I unplugged something or just that > there is no code telling the Z axis to move. > > I guess the next thing to do is run all the grounds to one common > location. Should they all go to the ground coming in from the 120 volt > supply?
That is as good a place as any. > Do I need to isolate the the power supplies from the chassis > and also ground those to the common ground? That would also be a great idea. There are sheet silicon rubber products made that will conduct the heat to the chassis fairly well if the supply needs that, or perhaps a rotron style fan can sub for the needed cooling. > I will run all the test and > do all the other suggestion that have been mention, that I am able to > do and report back. I hope I've not laid out too lengthy a test procedure. Sometimes its faster to just redo it. > Just out of curiosity what more do need in the schematic to make it > complete. https://sites.google.com/site/bmklawt/home/control-schematic That is I think, beyond the scope of text messaging, and I'm not good enough in gimp to pull that and fix it. Besides that, I am out of pocket & off the list next week, retrieving a 40kw television transmitter my old tv station has purchased for use as a linear amplifier, we have a CP to raise our digital power. I say 'my' but when one was the CE there for nearly 20 years, it feels like it was mine, I built a lot of it. Yeah, I'm an old fart, made it to 77 a couple of weeks back. ;-) > Much appreciated, > Bruce > ------------------------------------------------------------------------ > ------ All the data continuously generated in your IT infrastructure > contains a definitive record of customers, application performance, > security threats, fraudulent activity and more. Splunk takes this data > and makes sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2d-oct > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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) If you lose your temper at a newspaper columnist, he'll get rich, or famous or both. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
