Unusual Movement

I have found this same type of movement in a new 6i25 installation by pncconf. Pncconf has set P=20 and FF=1 as default.
When I get to this machine next time I will try to change P to 1000, but what about FF?

Setup is Debian Wheezy with LinuxCNC 2.7.4
PnCConf is Beta 1
Mesa 6i25 controlling three Gecko G213V directly.

FF1 must be 1
P should be 1000 for 1 KHz servo thread

I changed P in my machine file to 1000 and this worked out very well.

Then I wanted to run Pncconf to improve on my axis timing.
I could not change the P values in Pncconf, the numeric fields were grayed out. I manually edited xP etc. in the .XML file but I suspect there is a way to change PID parameters in the Pncconf menus.

If you want to change step rate in Pncconf axis test, the axis has to be enabled and I tried similar variations for PID parameters but no luck.

So, how do one change PID params in Pncconf?

Like stepconf, pncconf works well for making an initial ha/ini file set but
later changes are best made by direct editing of the files

If you want to change the PID parameters on a live system, the calibrate menu in Axis is a good way
Note that there is really not much to tune unless you have special problems you need to solve

P=1000
FF1=1
everything else 0

Is very close to optimum for a 1 KHz servo thread system

Yes,
I find it convenient to run a configuration wizard to modify homing, step speed and so and then copypaste into my machine.ini

I just wanted to show you that the PID parameter boxes are grayed out in my Pncconf.