Preprocessing (STEP format only)

M_BÖHME

Hi

Can anyone explain what the different options in Preprocessing do when you export to step?

S1mon

I don't know, since there's not much info in the help or anywhere else that I can find, but my guess is that the default (which seems to be "none") is good enough for most cases. In general, with CAD translation, it's important to do some tests between systems with parts/assemblies that are representative of the size and complexity of your project. Waiting until the last minute to export and transfer a file is a recipe for disaster. 

Except in the cases where it's using the same kernel (e.g. Parasolid), there can always be some issues.

gert_botha

From online Help:

• Preprocessing (STEP format only) - The options for parasolid preprocessing. Options are:
  • None - Default behavior of the Parasolid reader with no model preprocessing.
  • Automatic - Uses the Translator preprocessing algorithm used in Parasolid model exporting, which includes model centering (if outside the valid Parasolid bounding box) and the HealAndSew algorithm.
  • Remove small entities only (advanced) - Parasolid reader uses the Bodyshop algorithm of removing small entities (i.e., small edges, small and sliver faces, and spikes) and periodic entity splitting (i.e., periodic faces and ring edges). Also includes advanced preprocessing for split ring edges, re-parameterization of the underlying surfaces of split faces, force setting a trimming loop to all faces, and trimming fins' SP-curves.
  • Remove small entities only (basic) - Parasolid reader uses the Bodyshop algorithm of removing small entities (i.e., small edges, small and sliver faces, and spikes) and periodic entity splitting (i.e., periodic faces and ring edges).
  • Remove small entities only (advanced) and convert all surfaces to b-surfaces - Similar to the Remove small entities only (advanced) option, with the additional preprocessing step where all surfaces are converted to b-surfaces.

Regards

G