Cannot constrain to this part

[RobJV]

I am probably missing something obvious but for some reason I cannot constrain to the surfaces of this part - only the origin planes.  Could somebody please take a look and let me know what you discover?

Inventor 2011 part

[JDMather]

Works here in 2012?
Shouldn't this part be uniform thickness?
If so, wouldn't Contoured Flange be a lot easier?

[RobJV]

Hi JD,

Thanks for checking in 2012 - could somebody also check in 2011?  If it works then I will upload the assembly as I cannot get it to constrain by surface at all.  I will also upload a video as it seems unbelievable.

(JD - Contour flange would be much simpler but there was a reason for doing it this way and there is also a reason why the part does not have uniform thickness - thanks though.)

Rob

[JDMather]

I am on my 2011 machine today and I get errors on the "outside" faces of the C (except for the ends). Constraints work on the "inside" faces and ends.
I'll have to check again in 2012 now that I see the constraint error.

[RobJV]

Thanks for confirming.  I may send this part to Autodesk as it created a lot of time and grief for me in my assembly as it took forever to troubleshoot my constraint errors.  Who would have thought that a part with flat sides cannot be constrained too?  Or maybe somebody from Autodesk could take a look from here.

Rob

[RobJV]

Could anybody from Autodesk take a look?  This is a big pain in my assembly as I cannot constrain as I want.

Rob

[Allen.Bai]

Seemingly it works well after re-create thincken in Inventor 2011 and 2012. Maybe you can try it on 2011 or 2012 version.