On Fri, 9 Dec 2016, Frederic RIBLE wrote: > Date: Fri, 9 Dec 2016 07:53:02 +0100 > From: Frederic RIBLE <fri...@teaser.fr> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Fanuc analog drive & LinuxCNC tuning > > On 09/12/2016 02:21, Peter C. Wallace wrote: > >> Are you sure the PWMGEN output mode is set to mode 2 ? >> (you will get very weird and unstable results otherwise) >> Note that changing the mode may invert the feedback so beware of runaways >> > I think so, will double check. > We have monitored the analog output of the 7i48 with an oscilloscope: > looks good, both for positive and negative values. > But there is some high frequency noise that may come from the cabling. >> Also since you are closing a velocity loop, you may want to >> run the servo thread faster (say 2 to 8 KHz if your PC can do it) > We have tested 1 kHz and 10 kHz: not much difference. > > Thank you for your help. > Frederic. >
Is the velocity loop gain in LinuxCNC set correctly? That is, is it set so you get ~+-10V at +-2000 RPM > > ------------------------------------------------------------------------------ > 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 > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ 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
