Thanks Peter,

That is exactly what the problem was. This hal file was originally generated by pncconf and it connected the signal without driving it. What is the recommended way to connect this? If I connect it to motor.n.vel-cmd it trips a following error as it hits the index when homing. If I leave it unconnected I don't have any problems when homing.

Les

Yes, previously the PID command-deriv pin did not work so FF1 was always calculated internally by using DP/DT, Now it does work in the somewhat magic way it was intended to work ( calculate the velocity internally if the command-deriv pin is unconnected but use command-deriv if its is connected)

So if you had your PID components command-deriv pin connected to a signal
but the signal was not driven (connected to motions commanded velocity
pin for example) You would get your present symptoms if you upgraded

Peter Wallace
Mesa Electronics

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