Jon Elson <el...@...> writes: - I just kind of feel my way and eventually get a > response I can live with, but I know it would be better with a bit more > damping. But, if I turn D up any higher, it becomes unstable. There > obviously is a phase shift somewhere in the system, I have a good idea > it is from electrical through the motor to mechanical, and then back > from the encoder. But, I don't really have a tool to quantify it. >
So an electro-mechanical resonant loop... Have you tried any sort of mechanical damping directly on the encoder shaft- kind of like a stepper motor damper? I tried pressing my finger on the shaft, etc. but didn't get any change. Tom ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
