An update and semi success story. After dinking with the noise from the GS1 VFD for way to many hours. I was finally able to get rid of the noise. I removed the drive. I put in a run capacitor and have the coolant pump running off the original contactor. I wound up using a 3uf capacitor. I tried a 2uf and it ran but it ran smoother with a 3uf.
I can run the machine will all features running and I don't have any noise at all. Based on my experience I would not recommend the GS1 drive at all. However if you have a need for a 1/4hp VFD let me know. I have one I will sell cheap. Thanks for all of the advice. Andy, Does it hurt to be right all the time? LOL! Later, Jim On 1/23/2016 6:22 AM, Dave Cole wrote: > You don't need to disconnect the shields at one end on the power > conductor shields. > Those are normally connected at each end. > > Dave > > On 1/22/2016 5:23 PM, Jim Craig wrote: >> I spent all afternoon looking for and trying to remove ground loops. I >> think I found all that I can eliminate. I have a couple minor ones due >> to the mounting of my PC motherboard/SSD that I don't think I can remove >> without making new mounting fixtures. >> >> I did find one that I was sure was going to fix the issue. My encoder >> breakout board that converts the honda connectors to RJ45 connectors had >> the power ground going to chassis ground due to the mounting bolts. I >> fixed that and removed that ground loop. I was sure that would fix the >> issue but it did not. >> >> Also the shields on the servo motor power cables are grounded at both >> ends in the motor and at the drive side. I disconnected the drive side. >> I am not sure if this is a good idea or not as It could pose a safety >> hazard. >> >> And for everyone's information the encoder cables are shielded, shields >> grounded at the control board only, the signals are differential and I >> am STILL having this issue. >> >> Anyway after all of this the noise is still present when running the GS1 >> drive for the coolant pump. I think I will try to source a run capacitor >> and switch back to a contactor for start stop on the coolant pump. >> >> The filter that I am using on the GS1 drive is a Tyco Corcom 5VB1. I >> don't have an operating scope to look at the noise on the lines. >> >> Thanks for the feedback everyone. Should have listened to Andy 6 months >> ago and went with the run capacitor then! ; ) : ( >> >> Jim >> >> On 1/22/2016 3:52 PM, Dave Cole wrote: >>> Are you using decent filters?? >>> >>> GS1 and GS2 drives tend to pump a lot of RF noise up the power supply line. >>> I've used the AD filters with good success. I think the one I used was >>> about $80. >>> If you are using cheap Ebay filters.... sometimes you get what you pay for. >>> >>> Have you put a scope on your AC lines to see if the filters are >>> effective?? I suspect they are not. >>> Re-routing your drive to motor leads is also sometimes effective. Keep >>> them as far away from low voltage wiring as possible. >>> >>> Dave >>> >>> On 1/22/2016 12:51 PM, Jim Craig wrote: >>>> Hey all, >>>> >>>> I have been troubleshooting some noise that I have on my servo encoders. >>>> I have isolated the noise source to be the 1/4hp Automation Direct GS1 >>>> VFD that I have running my coolant pump. If the coolant pump is not >>>> running then there is no noise on the encoders and the machine maintains >>>> correct positioning. If I turn the coolant pump on then the encoders get >>>> false signal that in turn changes where the machine thinks it is. This >>>> problem showed up immediately after I retrofitted the machine this last >>>> summer. I have just now been able to diagnose where the issue is >>>> originating. >>>> >>>> In attempts to improve the situation I have done the following. >>>> Installed EMI filters on the supply lines to both the coolant and >>>> spindle vfds. >>>> worked on ground system to try to isolate the noise. >>>> rerouted the coolant pump motor power cable completely away from >>>> any other cables and completely away from the machine. >>>> >>>> All of these things have failed to improve the noise issue. >>>> >>>> I also tried the following to try and diagnose the issue. I disconnected >>>> the coolant pump motor cable from the coolant pump vfd. Disconnected the >>>> spindle motor from the spindle vfd. Connected the coolant pump to the >>>> spindle vfd. Note that the spindle vfd is a 3.0hp Automation direct GS2 >>>> drive. >>>> >>>> When I did this and ran the coolant pump via the spindle vfd there was >>>> no noise on the encoders. >>>> >>>> Does anyone have any ideas on how to get rid of this issue. I really >>>> want to make some parts but I can't with the noise issue. >>>> >>>> I talked to a EE buddy of mine and he mentioned running both motors >>>> (spindle and coolant pump) off the same 3.0hp GS2 drive just to get me >>>> going. What do you think about this? Will running two different sized >>>> motors on the same VFD cause any issue. Right now I don't run my spindle >>>> in reverse so I would not have any trouble with the coolant pump running >>>> backwards. >>>> >>>> I talked to Automation Direct and they said that the GS1 is more prone >>>> to noise than the GS2. I am contemplating getting a 1/2hp GS2 to replace >>>> the GS1. >>>> >>>> So frustrated right now. >>>> >>>> Let me know if you have any ideas. >>>> >>>> Thanks, >>>> >>>> Jim >>>> >>>> ------------------------------------------------------------------------------ >>>> Site24x7 APM Insight: Get Deep Visibility into Application Performance >>>> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >>>> Monitor end-to-end web transactions and take corrective actions now >>>> Troubleshoot faster and improve end-user experience. Signup Now! >>>> http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 >>>> _______________________________________________ >>>> Emc-users mailing list >>>> Emc-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> ------------------------------------------------------------------------------ >>> Site24x7 APM Insight: Get Deep Visibility into Application Performance >>> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >>> Monitor end-to-end web transactions and take corrective actions now >>> Troubleshoot faster and improve end-user experience. Signup Now! >>> http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> >> ------------------------------------------------------------------------------ >> Site24x7 APM Insight: Get Deep Visibility into Application Performance >> APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month >> Monitor end-to-end web transactions and take corrective actions now >> Troubleshoot faster and improve end-user experience. Signup Now! >> http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
