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CATIA V4 (T-Systems) >> AutoCAD/MDT

The following settings are recommended up to CATIA V4.2.5 with COM/STEP 4.3.1.0 and AutoCAD 2017/Mechanical Desktop 2017

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-model. 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 compliant 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:
    • 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 Conversion:
    • 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

  • An adjustment of the STEP file extension is not necessary.

AutoCAD/MDT - STEP Postprocessor

  • To import a STEP File you can choose Insert -> STEP... or the STEPIN in the command line.
  • Sub-elements of objects cannot be colored individually in the system.
  • Importing a product with multiple bodies, an assembly is created.
  • The import log file "filename.xli" gives further information.

AutoCAD/MDT - System

  • Shaded view is helpful and gives a first impression of the model quality.

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