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Fanuc EX 1039 Alarm

matchu

Plastic
Joined
Mar 17, 2023
Machine: Johnford VMC1300HD
4th Axis: Golden Sun CNC-401RV
Control: Fanuc Series Oi-MD

Hi, I've been getting a recurring alarm while trying to machine a part using the 4th Axis to index. Alarm message:

EX1039 A AXIS UN/CL LS ALARM

Appears to be telling me that the A Axis is not properly clamping? If I reset the alarm it will run again for a few minutes and then it alarms again.

If anyone could point me in the right direction to troubleshoot this thing it would be much appreciated. Not sure if this is a hydraulic, pneumatic, or electrical problem.
 
You would need to look at the manuals / ladder for what's going on.

Most likely, there's probably 2 limit switches for the A clamp. And either they are both ON, or both OFF.

Or there's 1 switch for clamp, and it is not working.

1000 series alarms on a fanuc are machine specific, made by the machine builder, so only the manuals or ladder could tell you where to look.
 








 
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