On 10/19/2016 10:53 AM, andy pugh wrote: > On 19 October 2016 at 18:34, Roland Jollivet <roland.jolli...@gmail.com> > wrote: > >> While the devices have a high resolution, look at pg.7 for all the >> non-linearity specs. So while you may discern 16 383 positions, you may be >> well over 50 counts in error. > > Possibly fixable in software. Especially with a stepper (we don't > normally worry about whether a _stepper_ is linear)
Another issue that might come about is encoder latency. I may be wrong but, I seem to recall Jon ran into this problem with capacitive encoders which had a lag between the position and the sending of the position signal. The lag also seemed to vary with velocity. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
