----- Original Message ----- > From: "Gene Heskett" <[email protected]> > To: [email protected] > Sent: Sunday, November 5, 2017 10:16:14 PM > Subject: Re: [Emc-users] excedrin headache #487.69 > > On Sunday 05 November 2017 21:21:09 Peter C. Wallace wrote:
> > The Hostmot2 velocity estimate system measures velocity by counting > > the number of quadrature edges divided by the time between the > > first > > and last edge so more edges helps (by making quadrature error less > > important), but in any case is much better than just counts/servo > > thread > > And my pid.feedback is this velocity signal but averaged over the > last 4 > incoming edges. That helps a lot at lower speeds. > > Thanks Peter. > > Cheers, Gene Heskett > -- Actually no, it wouldn't be. (at least I don't see how it could be.) When using Mesa hardware Linuxcnc does not see any of the encoder edges. It only sees the position and velocity values calculated by hostmot2 and sent every servo thread cycle. What you are probably doing is averaging the velocity value returned by hm2 for the last 4 servo thread cycles. ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
