Originally Posted by
mactec54
It does sound like it is loosing position do you have servo motors or steppers on your machine if servos then it seems that you may have an encoder problem could be just dirty, don't remove it just the cover, and you may be able to clean it, they also could be on the way out, these systems have lasted very well, those that are still running but may be close to a new control and motors drives upgrade, parts are only available from someone that has upgraded which you could still be getting bad parts from also