On Oct 17, 2011, at 1:07 PM, Peter C. Wallace wrote: > Actually that sounds very good! > > You have an acceleration of 300 IPS/S and a slew velocity of 50 IPS (that is > .050" per servo thread) I would not be at all surprised that the following > error can not be improved
I clearly don't understand. Since there is no actual feedback how can there be ANY following error? > (at least at 1KHz sample rate and the Are saying that it might improve if I can run the thread faster? I don't currently have a base thread, but I could. Could I put it in the base thread, at a much faster rate, rather then in the servo thread (since I don't seem to be able to set the servo thread down)? > Step generator driver tha is not optomized for such high accelerations and > velocities). What is the driver optimized for? What should we expect? > Like I said before, you might have better luck using a normal PID loop at > these speeds (this amounts to taking your encoder config, disconnecting the > encoder feedback to the PID component and connecting the stepgens feedback in > place of the encoder feedback. With a PID loop you have the FF2 parameter > avaialble to tune out the lag on acceleration I can't go back to the encoder config until the parts come in for our differential to single ended converters. But, I am anxious to try it. I am also anxious to try the PWM/Dir version, but I haven't gotten a firmware load yet... -Tom ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
