Hi, All
I have an urgent problem with a servo alarm. After shutting down normally last night, trying to power-up this morning has produced a stubborn alarm #401. Looking it up in the book ,it says something like the velocity control for one or more axis has turned off.
Any way I can get it up and running, or is this a service call?
Thanks in advance for any help at all!
Thread: Fanuc 6M servo alarm
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12-19-2006, 03:58 PM #1
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Fanuc 6M servo alarm
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12-19-2006, 06:13 PM #2
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Try the resets on the drives, check the fuses and the flag fuses.
Al.CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
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12-19-2006, 08:09 PM #3
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I was just having a similar problem on my 15-M.
I could get is started after about 6 tries.
Had to replace the Z board.
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12-19-2006, 11:58 PM #4
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Do you have any alarm Leds on the servo drive?
Check for 100vac between terinals 3 and 4 on each servo drive
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12-20-2006, 08:21 PM #5
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Hi guys, sorry for my bad English but I' m from Italy...
If you don't have red Light led On (Alarm) and if you have the 100Vac on pin 3-4 replace the MCC on POwer PCB of Servo Alarm 401 means problem on axes X or Z due to from the VRDY Signal. Usually the problem is due to the bad contact of the signal VRDY trought the MCC.
Googd luck and tell me something.
Bye Andrea.
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