[ThatguyDave]

Good afternoon. Some months back I purchased a 1997 Daewoo 8S and I'm finally getting the opportunity to get it set up and under power in Philadelphia. Along with a 1996 Fadal 4020, this is my first CNC so I would really appreciate some insight on a few matters.

The building is wired for a 240V 3 phase delta service, ie one center grounded 240V transformer supplying two 120V single phases, that combine to one of the 3ph 240 legs, and a second transformer supplies a high 208 leg whose potential to either side of the first transformer's output is also 240V. The high leg in my particular area is a bit high, 213V and another leg is sometimes a bit low so on at least one occasion I measured voltage as high as 247V coming into the building. Granted this voltage will drop somewhat as it travels 125+ ft to my circuit box and another 30 ft to the machine.

As such the 240V might be slightly more than 10percent higher than the 220V the machine was specified to run on. My electrician doesn't think this will be an issue but searches of past posts here show that at least some would disagree.

The machine has a Mitsu Melda 520L control. Unfortunately the machine/control manuals don't seem address voltage requirements in much detail.

Do I need an autotranformer to comfortably run this machine?

Additionally, what coolants would you recommend. The machines will be doing alot of all around work ranging from SS, to tool steel, with plenty of aluminum thrown in for good measure. Its mind boggling with all the coolants that are available. I can't even decide on a type of coolant let along an individual mfg.

Thanks again for the advice. Dave