22 квітня 2012 р. 02:42 Peter C. Wallace <p...@mesanet.com> написав:
> Are you using the encoder velocity output to feed to the pid components > fb-deriv pin? > > If not already doing this, this can improve the D noise situation > Thanks, it helps a little net x-pos-cmd axis.0.motor-pos-cmd => pid.x.command net x-pos-fb hm2_7i43.0.encoder.00.position => axis.0.motor-pos-fb => pid.x.feedback net x-vel-fb hm2_7i43.0.encoder.00.velocity => pid.x.feedback-deriv (was pid.x.command-deriv) Now I have http://img171.imageshack.us/img171/6079/screenshothaloscillosco.png 7i39 max voltage limits velocity to ~1.25 m/s as we calculated before. Maybe using 1um encoder instead of 5um would also help decrease D noise? ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
