Hi All,
I've got an assembly where a cam-mate enables a cylindrical follower to run along a cam face.
Originally I had a solid brass bush follower running along it and the model built and ran just fine. I've since upgraded to running a small roller bearing follower in its place to reduce friction/stiction and I can't get the cam follower mate to behave. The bearing is larger diameter than the original solid follower by a factor of about 2.
It builds and give me the warning "some elements of the cam are of smaller radius than the follower and this may result in instability" or words to this effect. The mate previews just fine.
When I drag the cam however, the follower instantly flicks from following the external profile of the cam to following the internal profile. It's then stable and runs on this inner profile but that's not what I need!
I've tried a number of things including making phantom faces, making faces with all large radiuses (larger than the follower) etc and I still get the same warning even though all radiuses should be large enough to take the follower without instability. The same issue of running on the internal faces persists.
Does anyone have any suggestions how to force it to run on the outside only?
My next step will be to try fixing the follower (so that the bearing doesn't rotate) and see if that makes any difference.... other than that I'm out of suggestions.
Cheers,
George.