Fanuc 16M #445 alarm!!

[fastolds]

We have a #445 Y axis soft disconnect alarm that is driving us nuts trying to figure out what the problem is. Fanuc doesn't seem to have a definate answer other than maybe replace the servo which we did. Anyone have this problem?

[Jarwalcot]

Does this problem happen during a zero return? If not what condition is the machine in when you see it the most?

[fastolds]

As soon as you turn on the machine the alarm is there. It was first a hard disconnect now it's a soft disconnect after replacing the servo amplifier.

[Jarwalcot]

fastolds,

Test the encoder cable from the motor back to the servo. I bet you some sort of problem there. I may have the servo parameter default setting if you would like to double check them against settings you currently have. I would need the motor & amp numbers. Also, are you sure the alarm is 445? This code does not match the problem you are having.

Let me know if I can help.

[Bluesman]

445 is a soft dissconect that is correct acording to my handy Fanuc miniguid here.
You got a bad encoder cable. Try swaping it with the X axis servo and see if the alarm transfers to the X axis. That is the quickest way if you do not have a spare cable.

Bluesman