an hour into a job I hear something isn't right. a problem has developed on the X axis, where it is losing 5mm at a time, going x+, and a few mm x-. I have dissassembled down to the motor itself, and the problem is still evident - hand held the motor will tug tug tug twich twitch twitch as it turns, rough, like a missing car engine, instead of a nice sweet whine, unless I ask for some rapid movement, when as it reaches higher speeds, it becomes smooth.
Classic symptoms of.....?
Thanks in advance.
Jim