D will also help with this. Both FF1 and D together in appropriate amount will probably help with this.
> Is the following error proportional to velocity? FF1 can often help with > this, unless it is a torque mode set up, then it becomes a little more > complicated. > > ----- Original Message ----- > From: "Eric H. Johnson" <ejohn...@camalytics.com> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Sent: Thursday, April 14, 2016 9:20:01 AM > Subject: [Emc-users] Following error on angular axis > > All, > > > > I am trying to lick a problem with following error on an angular axis (A). I > am using a Mesa 7i43 with the 7i33 quad servo interface. If I set the axis > max_velocity above about 2 RPS I start getting following errors on G0 moves > with any reasonable value for FError (i.e. under 10 degrees). The motor > should be capable of almost 60 RPS. The encoder is 500 count, 2000 with > quadrature, so only a little over 1Khz / 4Khz when I start to see the > problem. > > > > The tuning is firm and giving good positional accuracy, and mechanically > there does not appear to be any significant mechanical resistance to > overcome. I have played with a number of the axis parameters, but seems to > come back to max_velocity, as adjusting acceleration and PID parameters > seems to have minimal effect on following error. > > > > Any ideas? > > > > Thanks, > > Eric > > > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
