helical cut out mates

[emc2673]

Hello all,

I am trying to create a mate on 2 parts; first part is a rod with a helical cut out (think lead screw here) and the mating part is a "follower" part which has a feature that fits into the helical groove. but my problem is that I cannot seem to get the tagency mate to work, that is since the follower part has a concentric mate with the rod (so that both parts are in line) and I am using the tagent mate so that the "follower" will rotate about the helical cut as it moves up and down the rod.

Any help on this matter would be appreciated.

 

[Theophilus]

Ideally, you would offset your helical surface mid-way between the two slot surfaces and mate the center of your follower rod to be tangent to that mid-way surface. Sketch a point in the center of your follower rod and sketch two to keep the follower rod perpendicular to your cut part's axis.


Jeff Mowry

http://www.industrialdesignhaus.com

Reality is no respecter of good intentions.