On Wednesday 18 July 2012 20:40:19 Jon Elson did opine: > Gene Heskett wrote: > > On Tuesday 17 July 2012 15:47:33 Jon Elson did opine: > >> Gene Heskett wrote: > > Got them Jon, see at: > > > > <http://coyoteden.dyndns-free.com:85/gene/Genes-os9-stf/GCode/> > > > > Cheers, Gene > > Well, I don't see anything wrong. I do see the spindle P term set to > 100, that may > be too high for stable response.
I think maybe it is. Noticing some steady state error, I jacked up the 45 for the FF0 setting to about 57 today, and now its even more funkity with the the error tending toward a smallish - figure. > Since you are feeding velocity out of > the encoder component, it will have a lot of fluctuation due to the > sampling. Somebody, I think Andy or Peter, suggested using the filtered > velocity output > from the encoder component at least for the closed-loop velocity instead > of the raw velocity output. It won't help for the spindle-synched > axis, though. I may try that next, with a pretty high gain setting on the lowpass module, perhaps a .25. My new rework station from X-Tronix came in today, but I've not plugged it in just yet. But the part I've been battling to make for the 3rd time now is done except for a pin hole and a slot in the extension so I can pin it from rotating while I adjust the nylock bearing adjuster nut. Once I get the station ready, I speed my feedback to the spindle up about 100x by changing that 10uf filter cap out for a .2 paper/mylar. That should help considerably. 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! If you are not for yourself, who will be for you? If you are for yourself, then what are you? If not now, when? ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
