I have been following this thread somewhat, and have a question, What is the difference between a line reactor and emi input filter?
We have a AD GS3 40hp drive in our turning center, and have the same noise problems with the drive, and I am not sure which one to buy, or do I need both? The drive schematic shows putting an emi filter on both sides of the drive, would that help as well? At $272 bucks a piece, I don't want to throw money away, but I do want to get this put to bed, we have been dealing with it for 2 years now, and I am getting tired of it. Thanks Rick On 5/14/2015 9:53 AM, Dave Cole wrote: >>> The Rasmi input filter > Take it off and see what happens.... > > If that drive is screwing with your keyboard that is on the OUTSIDE of your > control cabinet, imagine what kind of RF exposure is on the inside of your > control cabinet! > > Those AD VFDs should also be sold as EMI test generators. ;-) > > Dave > > > > On 5/14/2015 8:53 AM, Tom Easterday wrote: >> I spent some time with the spectrum analyzer but did’t have much luck in >> isolating the sink for the noise. I just verified that my VFD does indeed >> produce a large amount of noise between low kHz and about 10MHz! I did some >> re-routing of wires and replaced some that weren’t shielded. I ordered some >> ferrites for the VFD-motor wiring and my computer I/O extension cabling >> which will be here in a couple days. >> >> However, I did find the source of the main problem! It was indeed my >> keyboard. Not the USB wiring from keyboard to pc, but the keyboard ITSELF >> is very sensitive to the noise created by the VFD. If I move the keyboard >> to the very extreme end of it’s (rather long) usb cable the problem >> disappears completely. 6” closer to the cabinet and noise reappears. >> Apparently the noise is being interpreted as key presses by the keyboard >> circuitry. I replaced the new water resistant Logitech keyboard with a very >> old Apple keyboard I had lying around and no more random characters! I >> also had a second problem where the VFD would shut down somewhat randomly >> which I thought was related to this noise as well. That turned out to be an >> over current condition at very low rpm. Tweaking some settings fixed that. >> >> The Rasmi input filter, and various re-wiring and shielding I did was >> probably not needed, but in the long run perhaps it will save me from other >> problems. >> >> Thanks, for all the input, >> -Tom >> >> >> ------------------------------------------------------------------------------ >> One dashboard for servers and applications across Physical-Virtual-Cloud >> Widest out-of-the-box monitoring support with 50+ applications >> Performance metrics, stats and reports that give you Actionable Insights >> Deep dive visibility with transaction tracing using APM Insight. >> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > > ------------------------------------------------------------------------------ > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications > Performance metrics, stats and reports that give you Actionable Insights > Deep dive visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Thanks Rick Lair Superior Roll & Turning LLC 399 East Center Street Petersburg MI, 49270 PH: 734-279-1831 FAX: 734-279-1166 www.superiorroll.com ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
