Unusual Movement

I have been converting my existing mill from parport interface to a 5i25. So far I have everything functioning ... except something seems odd about the movement. I can rapid across the table just fine, the deceleration is okay, but in the final few mm's it moves really really slow before coming to a stop. Is there configuration to change this?

LinuxCNC 2.7.4
Mesa 5i25 to existing (parport) Controller
3-axis Mill using Steppers

PS: I wasn't sure which topic to put this under.

Try setting the P term to 1000

( assuming this is a pnnconf configuration )

Excellent thanks. I had just been reading your other post "suboptimal P settings" and thought it might be related.

I have a longer servo thread period, so using your calculation:
P = 1 / (servo_thread)
P = 1 / 0.003
P = 333.33
The movement is working correctly now.

I have a long servo period due to infrequent high jitter. One day I'll get some time to investigate it ...

Initially this seemed to have resolved it, but there is still something not quite right.

(1) Infrequently the final movement (before coming to a stop) moves very slowly.

(2) Jogging (in any axis) with fast speeds is very smooth. However, jogging at slower speeds is not smooth, and randomly sounds like its either missing steps or decelerating/accelerating.

How bad is your jitter?
Can you post your hal/ini files here?