CNC Mill Transformer

[Mike AA]

Listen and read Al's writing, he is mostly correct, if not all correct. As an electrician I am going to tell you that the transformer you are looking for will be expensive ( a 32volt ( you would need a 232volt) cost around $800, in 1998 each, and there were 3 ( we installed a 3 phase service and the elevator needed to be run at 240 thus the buck-boost transformer) This would probably be much larger than yours would need to be but you get the idea ). Ask at the locating where you are installing this mill and see if they have a supply of 440 3phase, but you will also have to find out if the mill requires a Y type or Delta. Which are the two most common for a three phase setup. IF there is 440 available in the building see about getting it run to the location ( From the main panel room) to the room which the mill will be in. Another option you could do is see about getting a different motor running at 208 ( Which is usually the only item which will run at the 440) and see how much of a difference in cost between these 3 items ( Transformer, wiring to Mill from mains, and new motor). Most likely the new motor and direct wiring will be less than the transformer. If you do get a specific size ( kva or amps) of transformer you need contact the local electrical supplier and they should be able to get you a quote quickly, Just remember to know the type ( Y or delta, etc).

Mike Aalderink