I have been noticing lately that when I am running at the higher end of machine travel I am getting oscillation in my stepper motors. I have only seen oscillation on the Servo side of things when they aren't tuned right. When I turn down my max speed it doesn't happen as much. It will even happen when I am just jogging, say to touch off a tool all of a sudden it is oscillating. It doesn't seem to effect the positional accuracy as I have measured a position before/after oscillation and its the same. I never saw this kind of issue with my last control setup (Parallel BOB). I can only think it has something to do with the initiation files I recently upgraded to using a 7i76E with the latest version of LinuxCNC. I did config through PNCCONF with only minor changes to get my spindle VFD working. When running a open loop system, should there be any values in the PID sections?