>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? Do I need to isolate the the power supplies from the chassis and also ground those to the common ground? 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. Just out of curiosity what more do need in the schematic to make it complete. https://sites.google.com/site/bmklawt/home/control-schematic 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
