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The following settings are recommended up to CoCreate Modeling 16.5 and AutoCAD 2017/Mechanical Desktop 2017

OneSpace Designer – System

  • Components of an assembly should have names no longer than 16 characters.
  • System accuracy should be set prior to modelling.
  • Recommended values are 10-6 mm, 10-5 mm, 10-4 mm.
  • The smallest extent value (e.g. edge length) can be set under:
  • SystemSetting ->Advisor/Check Setting -> min Edge
  • All Advisor Checks (voids, nonmanifold, knife edge, min edge) should be active while modeling the part.
  • Complete body checks should be done frequently during design and prior to export to STEP.

OneSpace Designer - STEP Preprocessor

  • When invoking the STEP export choose as option target system e.g. (CATIA IBM) or CATIA (debis) or Pro/ENGINEER.
  • If, in case of an assembly export, the option Assemblystructur/Shared Parts is set ON, individual colors of instances cannot be exported.
  • If the target system cannot process assembly structure information or geometric transformation, then you should select NO to suppress this information.
  • Hybrid models must be exported with multiple products. You can also use the Structure Browser to make your selection. If you try to specify a part by clicking in a viewpart, you will select only faces or edges instead of the whole part.

STEP File

  • In the filename syntax special characters (especially / * % ) or umlauts must be avoided.
  • The STEP file extension must be changed to *.step.

CATIA V4 (Dassault) - STEP Postprocessor

  • Identical curve tolerance should be set according to desired model space. (default: 0.1 corresponds to 10m model space)
  • Recommended settings in declaration file:
  • st1cat.EXACT_SOLIDS_CREATION=TRUE (creates SOL instead of VOL)
  • st1cat.TOPOLOGY_HEALING=TRUE
  • st1.cat.CATIA.REPLACE=TRUE
  • The log file filename.log gives hints about translation success. Check for converted/failed STEP entities in the summary at the end of the file. 

CATIA V4 (Dassault) – System

  • Each component of an imported assembly is located in a separate workspace.
  • The master workspace shows the whole assembly.
  • To remove the text added to the model use: TEXT -> ERASE -> *FAC+*SUR etc.
  • Shaded view is helpful for a first impression of model quality.
  • With IDENTIFY look for received SOL, VOL or SKI.
  • Use CATCLN.

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