Just as a note some cnc machines will not run on a static phase converter. If it will run on a staic converter you will only get 2/3 rated HP out of the machine. I have a static converter for my mill that is one Hp and it works but starts the spindel slowly. The trade off is the static converts are cheap. If you have an extra 3 phase motor that you can hook up to the static converter it is almost the same thing as a rotory converter.
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