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Checking Degrees of Freedom and Redundancies

For Motion Analysis type studies, you can calculate the number of degrees of freedom in a model as well as the redundancies introduced by mates.

  1. Click Calculate Tool_Calculate.gif (MotionManager toolbar).
  2. Right-click Mates mates.gif (MotionManager tree) and click Degrees of Freedom.

    The Degrees of Freedom dialog box provides the degrees of freedom in the model and a list of the redundant constraining mates.

Redundant constraints can provide inaccurate motion calculations. To address this problem, try one or more of the following, in order, as appropriate for your model:
  1. Create rigid subassemblies and rigid groups for components that are fixed with respect to the assembly motion.
  2. Replace redundant mate pairs that form a hinge with hinge mates.
  3. Replace redundant mates with mate primitives.
  4. Replace mates with bushings.


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