[sailer99]

After playing around with trying to simulate this cam for a while this season I found it really depends how fancy you want to get with the animation/simulation. If you are fine with the release not being sprung forward and the cam being simply rotated by mouse you can use a limit angle mate between the first linkage bar and the rotating cam itself. This will simulate the motion quite well. If you want to see an example I can quickly make one up for you and send you the file.

edit- Attached an quick assembly of a cam, with the limit angle way of doing it if you turn the cam with your mouse it will work. However because of how it works it will only work if you turn it clockwise as the mate doesn't limit it properly turning counter-clockwise