GearHeads Corner

I was hoping some of you gearheads out there could help me:  I have a small project I'm working on, one part of it involving these 2 gears: an elliptical (major axis 4", minor 2"), and a circle (dia 1").  My problem is that I want the shafts to stay centered on both gears, and hold the two of them together using a spring.  It'll look like #35 from Brown's 507 Mechanical Movements 

or the gears at 3:23 of Steiner's Mechanical Principles
https://youtu.be/mkQ2pXkYjRM. (except with the shafts centered)

Eventually I'd like to make a 3d print of it, so I was hoping to get them designed just right.  I've tried your program, but I can't seem to figure out how to make the gears with centered shafts.  I suppose I could always move the shafts using another program, but then I can't seem to get the pinion gear to become perfectly circular.  Can your program make my design?  If not, any ideas on what I can do?

Hi:

  Create the noncircular as an Order 2 ( or any order really) , then create the circular as an order 1 with 0 eccentricity, or just make a normal circular gear of the same DP or module. Since the noncirculars are toothed using a virtual hob, a circular will run on a noncircular.
(So loang as they are the same module or DP and pressure angle. The program will not simulate it though, it will simulate only gears with a set center distance.
    Your two gears will mesh and run though, so long as the eccentricity od the noncircular is not so high that convex segments
make it so that it cannot fit in the section. Once you make the two gears, just make that spring shaft and you should be fine.

Art