[wms]

Mtech,
You said in your post that the servo is brand new and that the old one was alarming out with a 414 error. That said, I would suspect either a bad cable or a bad driver card. I say this because you changed the servo and still get a positioning error.
Did the new servo come with the encoder, or did you install the old encoder on the new motor? If it is a new encoder then I would look at cables or drive cards. If you used the old encoder then that might be the problem.
Also you didn't state what model Fanuc. Some models the servo drives are on the mother board. Some the drives are seperate.
If they are on the main board you can swap conectors to trouble shoot.

As HU said I would swap drive cards to see if the problem follows the card. Then take a hard look at the cable to see if it is damaged. Look for wear on the outer sheath and look for cracks that could let chips and coolant into the inner part. Also look to see if the cable is bent around somthing that could cause the inner wires to be broken and shorting out. I have seen a broken wire in a cable assembly do some strange things, over load alarms, following errors, run aways, ect...