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Grubler count

Question asked by John Sutherland on Jun 25, 2009
Latest reply on Aug 27, 2012 by Brad S
I am attempting to diagnose the unexpected behaviour of my motion analysis.

The DOF report overlooked 8 revolute joints so perhaps this indicates a problem with the model. These joints are virtual axle bearings. I am assuming that I can employ Joints in lieu of cylindrical roller bearings.

The images show the Mate property manager. I had assumed that Bushings were enhancements to Mates, but I now read in the SW Help that I can use Bushings instead of Mates.

Did I double up when specifying both a Concentric Mate and a Bushing in the one property manager?

I don't see how I could avoid defaulting to a Concentric Mate after specifying the two mating features and before moving to the Bushing tab.

Should I mark the Mate for positioning only so that the motion study will see only the Bushing?

My Bushings do not show in the Feature Tree but the Concentric Mates do.

Is there a document where this is explained?