Hide Table of Contents

Redundant Mates

For Motion Analysis studies, having redundant mates is the equivalent of over-defining a SolidWorks model.

For example, consider a door with two hinges. Only one mate can restrict the vertical translation of the door. The other is redundant. You can consider that there is no vertical direction force component on the second hinge. You can see this when you plot the forces.

Before running a study, remove all redundant mates. You can remove all redundant mates manually, or have SolidWorks Motion attempt to remove them automatically.

Automatic redundant constraint handling can yield erroneous results. It is best to define the model such that there are no redundant mates.

To manually remove redundant mates, try one or more of the following, in order:

  • Redefine the model such that there are no redundant mates, or as few as possible.
  • Identify all the redundant (over-constraining) mates and manually change those mates into bushings on the Analysis tab in the Mate PropertyManager.
  • Select Replace redundant mates with bushings in the Motion Study Properties PropertyManager. This option significantly slows down the simulation time, so try this only after exhausting other options.

To specify automatic redundant mate handling in SolidWorks Motion:

  1. Click Motion Study Properties (MotionManager toolbar).
  2. Select Replace redundant mates with bushings.
This option replaces any mate that has a redundant component with a bushing. The loads in the system are distributed based on which mates are replaced.

Provide feedback on this topic

SOLIDWORKS welcomes your feedback concerning the presentation, accuracy, and thoroughness of the documentation. Use the form below to send your comments and suggestions about this topic directly to our documentation team. The documentation team cannot answer technical support questions. Click here for information about technical support.

* Required

Subject:   Feedback on Help Topics
Page:   Redundant Mates
*   I acknowledge I have read and I hereby accept the privacy policy under which my Personal Data will be used by Dassault Systèmes

Print Topic

Select the scope of content to print:


We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

 Never show this message again

Web Help Content Version: SOLIDWORKS 2013 SP05

To disable Web help from within SOLIDWORKS and use local help instead, click Help > Use SOLIDWORKS Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.