Friction is defined as the force that opposes the relative motion or tendency of such
motion of two surfaces in contact. The friction coefficient of a prototype’s surface is a
functional  component,  not  an  aesthetic  one,  and  simulates  the  end  product’s
mechanical properties. A well-designed prototype that takes friction into consideration can have the following advantages: an improved grip for the end-user, reduced part
wear, simulated movement functionality and sliding abilities.

PolyJet™ Connex™ 3D Printing systems provide a solution for prototyping surfaces with varied friction coefficients that were impossible or cost-prohibitive to prototype in the past. By being able to print several materials in one build process, Connex systems  can produce prototypes with varying friction areas on one given part. Users determine the friction coefficients for different areas of a part according to the load factor. This saves time and money by providing an easy solution for prototyping complex parts whose dynamic friction coefficients can be tested in a single build process.

1. Recommendations

• Save your design in separate STL files according to the different parts. This is
  recommended for flexible areas, as well as for rigid parts. Later, the parts can be
  printed in different colors to visually separate areas of the model.

For more information, download the full best practices document here.

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