I had the same problem trying to run a lathe with a stock motor off my Ice, you dont need a different power source. The problem (as I am sure someone has said) is the stock motor draws too many amps under stress, and that triggers the amp cutoff on the Ice wich I think is 10. Resolution, get a Integy lathe motor 45t will work fine, I have always used 55t, but it is really not much if any differance. With the lathe motor you can run it off the ice at 7.2v and not have a problem. That is the easiest, and probably cheapest solution.