Kim, On Wed, 2011-02-16 at 17:03 -0600, Kim Kirwan wrote: > Yes, this can be done and Stuart (for one) has done it. > > See the wiki "Combining Two Feedback Devices On One Axis" > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Combining_Two_Feedback_Devices_On_One_Axis >
Certainly that looks like a possibility but, I think that the state of the art approach would be a Kalman filter, that can be used to get the best from both sensors and give back a more precise feedback. In addition to this, if a decent model of the machine is available, kalman filter would use it additionally to get an even improved feedback (including velocity and acceleration if needed). Cheers, Javier > Thanks, > > Kim > > > On 02/16/2011 03:21 PM, Marshland Engineering wrote: > > I'm not sure if this can be done but I do have it on my existing mill. > > > > It has servo drives with encoders but it also has encoders on the table. > > This obviously gets rid of backlash. (I have to say it is very accurate > > mill) > > > > Has anyone done something like this ? > > > > Thanks Wallace > > > > > > > > ------------------------------------------------------------------------------ > > The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: > > Pinpoint memory and threading errors before they happen. > > Find and fix more than 250 security defects in the development cycle. > > Locate bottlenecks in serial and parallel code that limit performance. > > http://p.sf.net/sfu/intel-dev2devfeb > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > ------------------------------------------------------------------------------ > The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: > Pinpoint memory and threading errors before they happen. > Find and fix more than 250 security defects in the development cycle. > Locate bottlenecks in serial and parallel code that limit performance. > http://p.sf.net/sfu/intel-dev2devfeb > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
