On 7/11/2013 10:00 PM, Jon Elson wrote: > Marshland Engineering wrote: > >> The only way we could get any stability was with the drives in Current mode >> and Tacho feedback. Nothing else was stable. >> >> > This is contradictory. Current mode does not use tach feedback. if you > have the tach connected, it is in velocity mode. Of course, you have > to have the tach phased correctly, or it will diverge. > > Jon > >
I was about to say the same thing. I don't see how anything could be "stable" in current mode unless you have a constant torque load attached. If you have stable velocities and the tach is required, then you are in velocity mode. Dave ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
