I also forgot to tell you about this wiring guide. http://mesaus.com/downloads/best_practices.php
On 1/22/2016 11:51 AM, 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
