> My present setup (determined by the try & cry & cuss method) on the mill, > using a 5i25 interface, does have PID's for each axis, and of note the P > setting hasn't been set above 1000 because it seemed non-critical, but > in my case it should be 2000 since the current servo period is .5 > milliseconds. This was reset from 1 millisecond when I incorporated a > hal stanza that made the encoders velocity output the summed average of > the last 4 edges the encoder detected. This absorbed the edge to edge > timing noise to a very helpful degree, but at the same time I figured I > should make the servo loop faster because of the delay in the averager > paragraph of my .hal. > > However I didn't think the cpu could do a .25 millisecond servo loop so > it wasn't tried. Half a millisecond does not seem to make it at all > sluggish for other uses. So next time I am at its keyboard, I will try > 2000 for effects, and just for S&G, a .25 millisecond servo-loop and > P=4000.
I think "P" should stay the same but "I" changed for a discrete PID reguator then period i changed. The sampling interval usually named "h" will change. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
