Hey Guys, I am new here and I need some help. I have a VQC-30/50B Mill and it is giving me a ramdom alarm ( 2 Servo Lag Excess Y Axis ). When it alarms out the spindle drops down slowly into the part unless I can hit the stop button as soon as it drops. If I shut the machine down and start it back up the alarm goes away until it decides to do it again. It might take an hour or a day but it continues. Any ideas on what is causing this problem?

Thanks

David