http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Combining_Two_Feedback_Devices_On_One_Axis
On 03/25/2015 08:01 PM, Leonardo Marsaglia wrote: > Same thinking on the bottom of the link you sended to me jon haha :). > > It seems redundant to measure the same axis twice, with two encoders. But > often that gives significantly better results than using a single encoder. > Whether it is two different kinds of sensor -- gyro, accelerometer, GPS [1] > <http://quadcopter.wordpress.com/2010/02/08/taking-a-break/>. Or two > identical sensors in two different locations, one with accuracy but bad > latency, the other with good (low) latency but bad accuracy: Bob Pease, > "What's All This P-I-D Stuff, Anyhow?"[2] > <http://electronicdesign.com/content.aspx?topic=what-s-all-this-p-i-d-stuff-anyhow-6131> > > 2015-03-25 23:59 GMT-03:00 Leonardo Marsaglia <leonardomarsagli...@gmail.com >> : >> 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
