The nice thing about mechanisms is that all one needs
to understand
them theoretically is a finger, some Advil, and the ability to
multiply/divide. Following a circuit board is much less intuitive.
And integrate and differentiate! That is _really_ had to do if you do not
know the functions of the cams! The trig functions can also be completely
non-obvious!
William Donzelli
william(a)ans.net