Hi. I'm stumped. Machine is an old quickturn 28N. I've owned it for about 15 years.It's like my best friend. We've had our ups and downs. All the drives have been changed over the years. Power supplies etc. It's always thrown alarms and been easy to diagnose (with a lot of help from this site).
What's happened this time
- it sat powered on for a day, nothing was wrong. It was powered down, sat for the morning and was powered on to start work, it had an emergency stop 128 alarm on the screen. All drives show E7 and we haven't been able to get rid of it. The emergency button is good and was changed out just in case. There's 24volts down to the control panel and to the drives. We spent a few hours on the phone with the mitsubishi techs and after going through the M300 servo disable system the techs are mostly positive it not the drives or the control. They feel its a problem down stream. My only problem is I'm pretty sure if it was, there would be an alarm however if it was a drive there should also be an alarm.
I've read and searched hoping to find an issue but everyone else seems to have the normal second code or drive error on the drive.
What Ive tried so far - pulled the lubrication unit, clean its filter checked its power and the sending unit
-disconnected all the encoders and servo motors, then re connected
- checked the home position sensors.
Is there anything else I can check? It doesn't have a bar feeder, parts catcher, conveyer etc..
What's happened this time
- it sat powered on for a day, nothing was wrong. It was powered down, sat for the morning and was powered on to start work, it had an emergency stop 128 alarm on the screen. All drives show E7 and we haven't been able to get rid of it. The emergency button is good and was changed out just in case. There's 24volts down to the control panel and to the drives. We spent a few hours on the phone with the mitsubishi techs and after going through the M300 servo disable system the techs are mostly positive it not the drives or the control. They feel its a problem down stream. My only problem is I'm pretty sure if it was, there would be an alarm however if it was a drive there should also be an alarm.
I've read and searched hoping to find an issue but everyone else seems to have the normal second code or drive error on the drive.
What Ive tried so far - pulled the lubrication unit, clean its filter checked its power and the sending unit
-disconnected all the encoders and servo motors, then re connected
- checked the home position sensors.
Is there anything else I can check? It doesn't have a bar feeder, parts catcher, conveyer etc..