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CATIA V4 (T-Systems) >> I-DEAS NX Series

The following settings are recommended up to CATIA V4.2.5 with COM/STEP 4.3.1.0 and I-DEAS 12 NX Series.

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

  • STEP files using either version (CD or DIS) can be imported.
  • The STEP filename including path should not exceed 41 Characters.
  • The STEP filename should not contain: equal sign (=), colon (:), semicolon (;), asterisk (*), question mark (?), quotation marks (""), or comma(,);
  • There must be no spaces in the STEP filename.
  • The extension *.step of the STEP files must be renamed to *.stp.

I-DEAS NX - STEP Postprocessor

  • Save reminder (Options/Preferences/Data Management/ Save reminder every) should be turned off since the translator stops for every alike message. 
  • In Menu STEP Export Settings AP214 several options for the used units of functionality can be set.
  • A change of the default options is only necessary in case of unsuccessful results.
  • If the import was successful, you will get a confirmation message.
  • Two log files are generated (filename.ipr and stepoi.ipr):
    • filename.ipr includes the import settings
    • stepoi.ipr includes an import log
  • The log files are written in the same directory as the STEP file.

I-DEAS NX – System

  • A part is automatically generated from the filename on import. 
  • If the part name duplicates an existing part name, the part is renamed
  • "Duplicate Part Name X", where X is a sequential number (X=0 for the first duplicate).
  • On each import, a new part is created even if the parts are identical. Therefore, the part names must be different.
  • On each import, a new part is created even if the parts are identical. Therefore, the part names must be different.
  • Use the Automatic Stitch-mechanism for information about open gaps and remaining free edges. It is found in Master Surfacing Module in Menu Surface Operators.
  • If free edges are found in solid models, the Automatic Stich-mechanism can be applied to merge free edges by changing default accuracy. For surface models, the edges that build the contour of the model remain free edges.

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