Nicklas, I guess I didn't describe the setup as well as I could have. The Gecko 320's are the source of the 20 khz pulses but the 320's are on the x and z axes and the noise is coming in on the spindle encoder lines. The noise is there even when the 320's are NOT active and the x and z motors are not running at all. The noise stops only if I pull the error/enable connection and disable the drive. The spindle encoder lines don't get very near the motor leads but I guess the motor leads could be radiating even when the motors are not running. By the way it gets really bad if I jog either x or z axis.
I will disable all but one of the 320's and try some ferrite beads on the motor output wiring to see if that will help. If it helps I can get enough beads to do them all. It I guess I could also try some bypass caps right on the 320's at the 48 volt DC terminals. I hadn't used any there yet because the 320s are only about 6 wire inches from the output filters on the trans/rect/filter type supply/. Thanks, Cecil At 04:11 AM 1/15/2017, you wrote: > > > Has anyone else experienced the PWM switching noise of their drives > > > getting into their signal level circuits? > > > If so, how did you deal with it? > > > > > > Thanks, > > > Cecil > > > > > Ahh, so I have company. I've converted the switching motor psu's to > > analog, but its pretty hard to block when the rediated noise is 12 volts > > p-p at about 100 megahertz before you start building a star ground. > >Common mode filter on motor cables? > >------------------------------------------------------------------------------ >Developer Access Program for Intel Xeon Phi Processors >Access to Intel Xeon Phi processor-based developer platforms. >With one year of Intel Parallel Studio XE. >Training and support from Colfax. >Order your platform today. http://sdm.link/xeonphi >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
