We have seven Daewoo Lathes , all of them are 220 volt machines. The controls are all Fanuc. We are located in San Diego , Ca. the power in our area is 240 Delta. When we moved to our new location we had San Diego Gas and Electric install a device to record the voltage highs and lows throughout the day. We found that the power varied between 220 volts and 260 volts . We contacted Daewoo and Fanuc and gave them the information and both of them advised us to install transformers on all of our machines . Fanuc indicated that they have hade machines in the field with their controls that have lasted 10 years on 240 Delta , but have had new machines that have smoked the controls and servos in the first ten minutes of operation. Daewoo advised us to install transformers on all of the machines also. In our case the transformers are cheap insurance , and have provided 10 years of service with no issues . All of our transformers are 45 KVA energy star. 240 V Delta to 208 V 3 Phase.
Hi Performance Machine & Metals Inc.
619 448 8802