Need help with an old Miyano JNC-35 lathe.It's had a problem with the Z axis servo.Gets hot noisy bearings was replacing it with a spare we had around.
I put the spare in and now get the 401 alarm.I can move the machine in handle mode but not jog or zero return get alarm instantly.It has a Fanuc 0T control on it.
I tried to adjust the gain control on the pcb but no luck.
Don't know much about the machine,just try to do repairs and trouble shoot when asked.
Any help much appreciated.