On Thu, 01 Oct 2009 12:32:48 -0400, you wrote:
>And what I think I'm seeing is quantization noise in the time domain, the >occasionally very narrow spike probably isn't there on your o-scope. But it >(to me anyway) points to a problem in that the sampling is probably not being >done in the base thread, but in the 1 millisecond thread. Can that not be >moved to the base thread? > >From that halscope shot, I think I'd slow the spindle revs to 100 just to >reduce the noise effects of the sampling jitter. I've redone that at 100 rpm, and out of interest looked at the pulses out for the Z axis, the position interpolation is linear, as shown in halscope, the pulses out are anything but! Surely they should be linear too? There are several screenshots so I bundled them into a pdf. On page 6 I changed the sampling rate to base thread. http://filebin.ca/wacbfm/screenshots.pdf Steve Blackmore -- ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
