On Saturday, August 13, 2011 02:54:27 PM Jon Elson did opine: > Edward Bernard wrote: > >> Hmmm. Never heard of electrical damping for steppers. What does that > >> involve? > > I don't think it is real common, but I can't see any reason it won't > work. You would put RC networks > across the windings to damp out the specific frequency band of the > resonance. If you wanted to > get really fancy, you could even use a parallel LC element with a series > resistor to tune it to the > resonant frequency.
My gut reaction to that Jon, is that it would total the amps by turning into a very low impedance load at the target frequency. The usual fix, and what I use, is a combination of microstepping to reduce the amplitude of the step size to something that doesn't excite the mechanics so much, and the damper on the back of the motor. I have switched to 4 step from 8 for test, and this problem is much much worse at 4 steps compared to 8. The new amps I have coming claim to be able to do 64 step microstepping. Whether that is an exploitable advantage remains to be seen cuz they're still on a row boat. > Being an electrical guy, whipping up an electrical > version of a viscous damper > would be my first choice, but I have to admit I have never tried it. > > Jon > > ------------------------------------------------------------------------ > ------ FREE DOWNLOAD - uberSVN with Social Coding for Subversion. > Subversion made easy with a complete admin console. Easy > to use, easy to manage, easy to install, easy to extend. > Get a Free download of the new open ALM Subversion platform now. > http://p.sf.net/sfu/wandisco-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Goto, n.: A programming tool that exists to allow structured programmers to complain about unstructured programmers. -- Ray Simard ------------------------------------------------------------------------------ FREE DOWNLOAD - uberSVN with Social Coding for Subversion. Subversion made easy with a complete admin console. Easy to use, easy to manage, easy to install, easy to extend. Get a Free download of the new open ALM Subversion platform now. http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
