[YPatrick]

Originally Posted by Ether

You can create spirals easily using polar coordinates.

See attached examples.

Also check out these threads:

http://www.chiefdelphi.com/forums/sh...93#post1330693

http://www.chiefdelphi.com/forums/sh...40#post1326440


One nice feature of a cam is that, with a little math, you can derive the equation (or generate a lookup table from experimental data) so that the torque required to drive it remains constant as it is pulling back the arm. Then you can use that equation to cut out the cam.

Thanks, I'm trying this in my CAD software right now.