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CATIA V4 (T-Systems) >> NX

The following settings are recommended up to CATIA V4.2.5 with COM/STEP 4.3.1.0 and NX 11

CATIA V4 (T-Systems) - System

  • No elements should be placed in NOSHOW/NOPICK.
  • Model should be cleaned of all unused information, because the translator exports the complete content of CATIA-parts.
    • Delete:
    • Unused DETAILS (in all workspaces) 
    • Unused elements from NOSHOW (in all workspaces)
    • Drawings
  • Update SOLID-M into SOLID-E with CATSOE utility.
  • Perform SOLIDE/UPDATE, also if message UPDATE ALREADY DONE appears. (Regeneration removes inconsistencies.)
  • Generate Volumes from SOLID-E and delete SOLID-E in all workspaces. (Geometry is still exported as a solid in STEP.)
  • Scaled and mirrored dittos (EXPLODE function) should not be used.
  • Before export elements of special CATIA modules (e.g. PIPING, BUILDING DESIGN) need to be converted to STEP conform elements.
  • Use CATCLN.
  • Assembly structures in SETs should be transferred to DETAILS.
  • Link all SETs if possible (SETS -> LINK).
  • Solids/Volumes consisting of separate Bodies should be avoided.
  • Objects used for Boolean operations should show good penetration.

CATIA V4 (T-Systems) - STEP Preprocessor

  • The COM/STEP STEP Processor can be used in batch, interactive and Java mode. The following descriptions refer to the Java GUI.
  • Menu STEP:
    • Select AP214 Version IS
    • Conformance Class: CC2 for geometry and CC20 for drawings
    • Select Product Structure S3: Item_Definition_Structure for assemblies
    • Geometry and topology: select G2, G3 and G5, do not select G4 and G7
  • Menu Conversions 
    • Choose Solid as Target modeling system.
    • INDEX and DATA size should always be set to generous values (50000, 200000).
    • Exporting DETAIL/DITTO creates STEP assemblies with the top level product named after the CATIA model. 

STEP File

  • In the filename syntax special characters (especially / * %) or umlauts must be avoided.

NX - STEP Postprocessor

  • Start the external STEP postprocessor with Translator -> STEP AP214 and select Import.
  • Select Edit -> Settings and define the options:
  • (or interactive from NX 8.5) To import a STEP File choose File -> Import ->STEP203 or STEP214.
  • Object Types: One or more of the options Solid, Product Data, Surface and Wireframe (depending on model).
  • Validation properties are supported.
  • Recommended is to use the default settings in menu Translation Control (Tolerant Modeling).
  • A *.log and a *.def file will be created in the same directory as the imported models.

NX – System

  • Shaded view is helpful for a first impression of model quality.
  • By choosing the menu option: Information -> Object -> Type -> Solid Body -> Select all correctly transferred solids are identified with red color. (Same way with other model types).
  • By choosing the menu option Information -> Object -> Objects -> Select all after choosing the filter for Solid Body in Information -> Object -> Filters -> Type Filter correctly transferred solids are identified with red color. (same way with other model types).

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