Ain't she a bute?
This is NOT my original idea, but I forget which blog I saw it on. If you do a google search for mixer ball winder you'll get plenty of ideas on how to make your own. I made mine with a squirt bottle cap, and an empty flash light and, of course, my kitchenaid stand mixer.
I propped the mixer up, put the bottle cap on where an attachment would go then shoved the flashlight on really tight. I tied the yarn on, put her back down, and turned her on. I went very slow at first, but I think I got up to the 5th speed. I wound the ball straight from the sweater, then slid it of the flashlight and put a straw through it, then put it on my DIY lazy kate and it's ready to ply!