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CATIA V4 (T-Systems) >> CATIA V5 (Dassault)

The following settings are recommended up to CATIA V4.2.5 with COM/STEP 4.3.1.0 and CATIA V5R24 (Dassault).

  • 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

  • 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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