freqmod.o in EMC started, now questions

OK, with the EMC Board of Knowledge online I have gotten EMC to come up with
the new freqmod.o module for steppers and it does run the machine with
faster movements.

Now for the questions:
What does the P and the FF1 parameter you play with really do?

Why do my steppers sit and buzz after a move? I actually think I know this
answer which I think is the steppers are hunting back and fourth about
.0002" trying to get where the feedback position matches the expected
position, but the steps are not fine enough to get a zero difference. I do
see the actual positions oscillating a few ten thousands. So, the real
question is not why, but how do I get them to just sit still when at rest?

Last question is how do the [TRAJ] and [AXISX] CYCLE_TIME relate to the new
settings? Should I just set them to .01 and .001 and leave them alone or is
their value in playing with these along with the P and FF1 parameter?

Thanks to all in advance,


Tim
[Denver, CO]