cam mate question

re: sw2006sp5

I'm wanting to have a roller within a subassy follow a cam plate that is an
open ramp made up of arcs and straight lines that are all tangent. Select
Tangency works on this cam surface, but with this selection, swx only goes
for a cam mate (only for a closed loop). I've tried making a single surface
of the cam faces, and also a curve along the cam face, but these aren't
recognized in making a mate. I've tried making the origin/axis mated at a
distance from the above entities with no success. This shouldn't be hard to
do, but I can't seem to find it. Any ideas?

thanks, bill

 

I made a simple extruded part with tangent arcs and lines...
offset the profile chain by x mm to coincide with the path of the
centre point of the roller...
convert that to a continuous spline and extrude a surface loop from
it...
in the assy mate the roller centre point to this surface..
add a mate for the sides of the roller and cam to be coincident or
whatever to constrain laterally
hide the surface body
should move around ok at least my trial did
if you like make another surface with zero offset and use that to mate
a sketch point on the circumference. this makes the roller follow
correctly around the cam rather than slide
HTH

 

Dear Bill,

Try making a surface offset of the cam surface (the surface should be
single and offset distance will be equal to radius of the roller) And
insert a new coincident mate between this offset surface and the origin
of the roller, pls check origin is the centre point or else make a
centre point and mate that one with the surface. Now you can roll your
roller along this surface.

Regards
Deepak

 

How does the offset surface become "single"? When making a coincident mate,
the entire offset surface (from the FM) cannot be selected. If I click on
one element of the offset surface, like a straight segment, the coincidence
is only on that segement.
When I offset the surface, I did the tangent select and there were no
options shown.
Bill

 

how is the offset of a series of arcs, lines, etc converted to a spline?

Bill

 

I think I found it, "Fit Spline"

Thanks,
Bill

 

sorry I should have said that specifically in my instructions
sorry too you wait for a reply - time zone difference and all ;o)