I have a Supermax v65A with a fanuc 18MC controller.
It used to produce a 351 x-axis alarm followed by a 414 alarm in X-axis. (most of the times, into a toolchange cycle).
After a little investigation I found that the previous owner tried to replace the X encoder cable. Eventually, he didn't replace the whole cable but only half of it.
I believed that was the problem together with some kind of cable-grounding error.
I have replaced the cable by myself, but I still see from time to time a 351 x axis alarm, even when the machine is on and stoped (controller into MDI mode ).

Any suggestions?

Thanks
Michael