2009/10/1 Steve Blackmore <st...@pilotltd.net>: >>What sort of encoder is it? It looks to have a slot that isn't registering. > > Heidenhain - there's nothing wrong with the encoder, it's the third one > I've tried, all with the same effect.
No, now you have the pulses on there I retract that suggestion. > what you can determine from the pulse widths/spikes is inconclusive. > > Halscope shows pulse width variation, my Tektronix o'scope doesn't. Is Halscope running in the base thread or the servo thread? I have found significant aliasing issues with running in the servo thread. The apparent variations are probably due to sample quantisation. > > I've another brand new 500ppr Stegmann encoder I could try, with Peter > Wallace's pulse reducer but I'm betting the results will be the same. I think you are probably right. Gear drive head? I wonder if those speed variations are actually real and due to gear rattle. -- atp ------------------------------------------------------------------------------ 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
