[Jman1823]

Hello all,

I have a 1991 Nakamura Tw-30 running Fanuc OT-c
Its been making parts great every day for a couple weeks. we had some bad thunderstorms and the power was really bad with a bunch of flickering and maybe a surge not sure.

any way the lath wont power down now. the power buttons don't do anything.
When I turn on the breaker the lath powers right up and everything comes on without pressing the power on and everything works fine and im still making parts.
but at the end of the day power off doesn't do anything either. I have had to just kill the breaker which really hurts me.

Any ideas would be great I'm pretty new to this thing.

Thanks
Jason
919-289-2166

[burs]

There are two answers in the german forum:
https://de.industryarena.com/forum/i...0&#entry512860

translated with deepl:

Is there no Nakamura technician available who can locate the fault?

I monitor storms on the internet. Especially https://www.lightningmaps.org is handy. If it becomes critical, I shut down all machines. This procedure saves a lot of trouble and damage.

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There are two obvious possibilities that come to mind spontaneously:

1. the switch-on button (normally open contact) is defective, i.e. it is permanently closed. In this case, however, the voltage would have to go away as long as you press the off button and come back when you release the button. 2. the switch-on contactor (i.e. the contactor that is the first to pick up when the switch-on button is pressed) is stuck, i.e. it is permanently energised.

I.e. the second variant is the more likely one.