The following settings are recommended up to CATIA V4.2.5 with COM/STEP 18.104.22.168 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)
- 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.
- 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.