Barrel Cam Mechanism 12 April 2017, 13:00 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! The pink cam is fixed. The green crank rotates. The yellow follower slides in a rectangular hole of the crank. « previous mechanism Spur Gear Drive next mechanism » Friction Sphere Variator load comments Please enable JavaScript to view the comments.