Okuma Electricals

[TheArmoury]

I bought an LNC8C awhile back and am getting to the point of setting it up.

My question revolves around the input voltage which I'm told by the local Okuma rep is very sensitive and critical. The unit is wired for 220 volt 3-phase but I was informed the electronics actually use 194-208 volts and that an input higher than about 223 volts will fry the electronics. I have 242, max, coming into the building/machine. I certainly don't wanna fry the system, but I also DON'T wanna have to spend a couple grand on a transformer to step down the voltage. I thought I might call the power company and see if they can reduce the incoming voltage but that would then require me to rewire my Haas, which is currently wired for 230v. Not really a big deal in my mind compared with the previous option of the step-down, but I would appreciate some suggestions from some Okuma users on here.

Thanks!

-J. Burnett, V.P.
Armoury Guns/ ARMTAC

[underthetire]

First off, the LNC8 (cadet) with OKUMA controls, should run 200-230 or so, no problem. You may even get away with 235, but 242 is just too high. If it's a Fanuc (ex GM LNC8) they can run to a max of 242. 220+/- 10%, same as all fanuc machines. The machine if I remember correctly with Okuma control, was only ~37 amps. A small step down set up will be less than 1000, and you may even be able to get away with some small buck/boost transformers. Those are pretty cheap.

[TheArmoury]

Guess I should've included the OS in my description: it's a '97 with OSP5020 controls.

I believe 37 amps is EXACTLY what's on the data plate... 13.7 Hz, I believe... While I have a decent amount of wiring skills I've never had to use a step-up/down transformer and find the number and sizing on buck/boost units confusing as hell... Can it be put in simple language that I can just go order?!? :-D

J. Burnett, V.P.
Armoury Guns/ARMTAC

[underthetire]

Guess I should've included the OS in my description: it's a '97 with OSP5020 controls.

I believe 37 amps is EXACTLY what's on the data plate... 13.7 Hz, I believe... While I have a decent amount of wiring skills I've never had to use a step-up/down transformer and find the number and sizing on buck/boost units confusing as hell... Can it be put in simple language that I can just go order?!? :-D

J. Burnett, V.P.
Armoury Guns/ARMTAC

Not really, thats why I just call our electrical supplier, give them the specs, they give me a part number and price.

[Algirdas]

13.7 Hz, I believe
You are right not wiring the machine. Ask electrician. You didn't told enough to decide what transformer is good for you. If you know some electrician, ask him.