Darcene; Thanks for the quick reply. I knew someone would know the answer and yes I did write it down. Now to put it with my sewing machine information.
A potted motor means, I believe, that the motor is all covered up, like a turtle in its shell, without any belt or even motor parts showing. The motor actually comes in a pot, of sorts. the belt driven motor has a belt which is visible and can be adjusted if it's too loose or too tight. I hope this helps. There actually is a good explanantion in the pages but mine is just my understanding of the difference.