Do the math. Accuracy is bad at low speed and there is a lower limit on speed. Is number of pulses counted to give speed? Is time between pulses measured to give speed?
Nicklas Karlsson On Wed, 25 Mar 2015 23:59:02 -0300 Leonardo Marsaglia <leonardomarsagli...@gmail.com> wrote: > 2015-03-25 23:17 GMT-03:00 Jon Elson <el...@pico-systems.com>: > > > You should check this out : > > > > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Combining_Two_Feedback_Devices_On_One_Axis > > > > There used to be a web page that described dual feedback on > > one of the big machines at Stuart Stevenson's MPM shop and > > had a bit of history of how they arranged to do that, but I > > can not find it now. They used a linear encoder for position > > feedback and a shaft encoder on the motor for velocity feedback. > > > > (Anybody know where the descriptive page with photos, etc. > > on that has gone to?) > > > > Hello Jon and thanks for the link I didn't remember about it. > > I guess my approach of using the same encoder mounted on the shaft of the > motor isn't the best solution for speed and position feedback right?. > > As I told gene I was planning on using the same encoder for velocity and > then position feedback but I don't know if this is a good option. > > > -- > *Leonardo Marsaglia*. > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming The Go Parallel Website, sponsored > by Intel and developed in partnership with Slashdot Media, is your hub for all > things parallel software development, from weekly thought leadership blogs to > news, videos, case studies, tutorials and more. Take a look and join the > conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
