Centrode Planetary

[John T]

Hi Art,
I've been trying to cut a centrode planetary - is it possible.  On all my attempts I can't get a mesh all the way round the planetary - when it gets to the small radius of the planetary the teeth hit instead of meshing.  The planetary is a 2nd order and the pinion is first order. 

Maybe I'm trying something impossible.

John

[ArtF]

Hi John:

Here's the rule, the shaper that produces the teeth MUST have a radius smaller than the
convexity radius of any convex part of the pitchline.

  In simpler form, reduce the number of teeth on the shaper to 2, then try it, raise this tooth count on the
shaper until such time as you get interferance, lower it by one and generate the final shapes that way.
Should work in most cases, but if not the elliptical coeficient is too high.

Art

[John T]

Hi Art,
Thanks for the help - it works for me now.

[ArtF]

John:

  Nice to see it worked out.

Thx
Art