Thanks Jon, I'll study your docs. What I can't understand though is why I is increasing the following error.
Les Jon Elson wrote: > > Because of discontinuities is the programmed path, the I term is of > limited usefulness. > I usually just put a tiny amount in and leave it there. I can't give a > fixed value, as it needs to be proportional to P. > With P=1200, then I would expect I to be about 10. If increasing FF1 > makes following error worse, reduce it. > FF is not a feedback, so it will easily "overdo" the commanded velocity > or acceleration. FF2 requires extremely small values, I often use > something around 0.005, but you can suppress error spikes on > acceleration very well with it. > > Assuming 5 TPI screws directly driven, then 1024 CYCLE/rev encoders > produce 20480 counts/inch, which is a bit low for a system without > velocity feedback. > > See my VERY well hidden article on servo tuning at > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?PWM_Servo_Amplifiers > > Jon > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users