I tried an inexpensive digital converter that made my machine motors very hot due to unbalanced power. A person I bought a milling machine from said he had an American Rotary and was very happy with the quality, so I gave them a try.

When the unit arrived, the control box had a shipping dent. I called American Rotary and they sent another one immediately.

The unit works flawlessly, is very quiet, and my equipment motors don’t even get warm.It has been very nice to deal with an honest company that looks out for the best interest of their customers.