[Jman1823]

Hello All,

I have a 1991 Nakamura TW-30 with a fanuc OT-C brain.
It is throwing the 414 servo Alarm X axis detect err
as well as 434 servo alarm 3 axis detect err.
It is almost always on except once in a while it will clear but if i try and engage the C spindle it will trip in right away.
checked dgn 720 and its 0001000 as well as 722 with the same code as 720.
I dont have the manual to see what those codes are.

any help would be great.

Thanks
Jason

[cncmakers001]

Hello All,

I have a 1991 Nakamura TW-30 with a fanuc OT-C brain.
It is throwing the 414 servo Alarm X axis detect err
as well as 434 servo alarm 3 axis detect err.
It is almost always on except once in a while it will clear but if i try and engage the C spindle it will trip in right away.
checked dgn 720 and its 0001000 as well as 722 with the same code as 720.
I dont have the manual to see what those codes are.

any help would be great.

Thanks
Jason

A Fanuc 414 servo alarm is generated by the CNC when it detects that an amplifier has a high current alarm 8, 9, or A. To determine the exact cause, you must go through the process of elimination. The high current alarm may be caused by the servo drives, amplifiers, modules, motor and/or cables.

In some instances, this alarm may indicate a short to ground. The short is causing too much current to flow through the power module inside the amplifier and will eventually cause it to break.

[Jman1823]

So did some more digging and replaced the A06B-6058-H224 and things have changed a bit. It looks like what you said is right as now it will try and power X for about 20 sec than it gives up and throws the code again. Unlike before it didnt try at all. While its trying the motor makes a buzzing noise. I swapped the left and right motors to check them and it didnt make a difference.
I checked input voltage and it is the same as the Left side.
I read that if you change any boards you have to change some parameters is that correct.
I disconnected the X motor and it dosnt error out but if i try and engage the C axis it will trip it out also it looks like the previous owner put a new C motor and cable in so it looks like its not a problem. So pretty much have tested both motors and cabels.

Let me know if you have any thoughts.

thanks Jason
919-289-2166

[Shoprag]

Attachment 494908

Here is a procedure to test the motor and cable. You should always run this test before installing a servo or spindle drive.