WOW! If you are lucky enough to not have done any damage, you MUST drop the voltage. You need to get as close to 200VAC as possible. This, and most CNC's are not tolerant of the voltage being high. That spindle drive in that machine is close to $12k to replace if you blow it. Fanuc is not taking exchanges at the moment for that either....at least 6 months ago they were not. Our customer decided to scrap the machine after blowing this drive!!
I can sell you a cheap transformer of you are interested. Brand new. Or you can find one local.