Servo Overload Alarm

Saturday morning a counterpart was drilling a hole in an iron casting in preparation for tapping with a 5/8-11 tap. Well he was drilling it dry, red chips started coming out, and the machine quit (not sure if the machine overloaded or he stopped it first). So here we were with an overload alarm (that only goes away if we power down and restart) and has a drill bit stuck in a casting. We twisted the drill bit with pliers and it was loose, still throwing servo overload alarm when we tried to raise the spindle. We cut the drill bit and broke it off to make sure the spindle was loose. Still giving overload. The X and Y axis move fine, but the Z sounds like it is shuttering and then it will thrown the servo overload alarm.

We let the machine cool off for an hour and still throws the alarm. Anybody got any ideas?

theres gonna be some numbers on the drive
when it alarms out
call mits and tell them number
probly a smoked drive

Is your brake stuck on putting extra load on the drive, which may have caused it to overload and kill itself?

FYI--you can got to www.meau.com (this is mitsubishi's website), go to downloads and put in the control and the type of servo. They have servo drive troubleshooting guides that may help you. You can look up the alarm number and get the info on it.

thanks okie