First of all, sry for my bad english, im from finland.
I have 1996 Fadal VMC 15-XT (3-axis) at my shop and it does strange things daily.
1. Motor overloads are common (X & Y) during rapid moves
2. After Y-axis overloads and axis driver resets, if i try jog it around, i get 1-5 times Y axis position limit
3. Last night i got several times C axis motor overload & C axis servo amplifier fault
4. few runaways occured