If you lift up the head, you should see a fairly large screw underneath, at least on mine, which is
the Artisan 5 quart. You'll have to experiment, first by turning it in one direction, then checking it out by placing a dime in the bowl, and mixing on low with the paddle. If the dime keeps moving a little bit when the paddle hits, it means you've adjusted it correctly. If it doesn't move, obviously, you'll need to turn the screw in the opposite direction, then check again. Hope this makes sense.