Faced with winding 30 some skeins of Jamieson & Smith 2 ply jumper weight into center pull skeins, I decided to search the web for an easier method than a swift and a hand cranked ball winder. Not wanting to pay for an electric winder, DH and I figured out there had to be a way to attach a small motor to the ball winder. NOT! So what other small motors were in the house that allowed a circular wind motion? Why an electric mixer of course!!! Having had surgery for carpal tunnel once, I prefer to save the hand motions for knitting rather than winding.
Google search brought up these sites from knitters who already had the idea:
http://www.figandplum.com/archives/000365.html using a hand held mixer
http://geocities.com/mama_bear_007/ using a stand mixer
The first couple of skeins were a bit comical as they looked more like children's tops than balled yarn but what the heck. It saved a lot of hand winding. Kitchen Aid stand mixer run on motor speed 6 balled a skein of yarn in about 45 seconds.