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NX >> CATIA V5 (Dassault)

The following settings are recommended up to NX 11 and CATIA V5R24 (V5-6R2014) (Dassault).

NX – System

  • Delete blanked elements before preprocessing.
  • To transfer colors of assemblies the colors should be set and saved with the individual components, not the assembly.
  • Note that NX uses the radius of a "tolerance tube", other CAD Systems like CATIA V4 define "tolerance" as the distance between two points.
  • Select Analysis -> Examine Geometry -> all options -> all elements (up to NX2). 
  • Select Analysis -> examine Geometry -> Set All Checks (up to NX8.5) The marked elements are likely to cause problems with data exchange, depending on the messages as explained below:
  • Severe errors:
    data structures, consistency, face-face intersections, self-intersections
  • Might cause problems:
    tiny, face smoothness, spikes/cuts, edge tolerances
  • Without negative influence on data exchange:
    misaligned, sheet boundaries, edge smoothness

NX - STEP Preprocessor

  • Start the external STEP processor with File -> Export -> STEP214.
  • Select Data to Export and define the options:
  • Object Types: One or more of the options Solid, Product Data, Surface, and Wireframe (depending on model).
  • The default tolerance value in menu Advanced -> Parameters -> B-Spline Aprx. Tol. of 1.01*10-5 mm can cause to very large STEP files and should be reduced in such cases(recommended value: 10-3 mm).
  • Recommended is to use the default settings in menu Translation Control (Tolerant Modeling).
  • Special characters in the filename of the STEP file are not allowed. The model will not be exported.
  • Validation properties are supported.

STEP File

  • No adjustment is necessary.

CATIA V5 (Dassault) - STEP Postprocessor

  • To import a STEP File please choose File -> Open... and select STEP file.
  • Recommended settings in the STEP import options (Tools -> Options... -> Compatibility) :
  • It is recommended to set the Continuity Optimization for Curves and Surfaces for the C2 continuity on Automatic Optimization.
  • STEP Assemblies created with the MAPPED_ITEM approach are not supported yet by the CATIA V5 translator.
  • The import logfiles "filename.rpt" and "filename.err" gives further information.
  • Validation properties are supported.

CATIA V5 (Dassault) – System

  • Shaded view is helpful and gives a first impression of the model quality.
  • Open.bodies are an indication of faces failures after the import of solids.
  • The filename of the imported model must not have special characters.

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