Workflow: Alias to/fro ProE

Alias and ProE are used in a complimentary fashion in many companies. Data transfer issues are usually caused by incompatible ways in which Alias and ProE operates.

• By default higher degree NURBS data is converted to cubic polynomial upon import into ProE.
• By default ProE uses relative tolerance system.
• By default ProE uses INCH as unit measurement.

Use the following configuration options in ProE. These options will allow least changes to the data transferred. The hidden option "intf_in_keep_high_deg_bspl_srfs yes" will allow transfer of higher degree geometry as it is.

enable_absolute_accuracy yes
pro_unit_length unit_mm
intf_in_keep_high_deg_bspl_srfs yes
INTF_OUT_BLANKED_ENTITIES NO
INTF3D_OUT_EXTEND_SURFACE NO
INTF3D_OUT_FORCE_SURF_NORMALS YES
FIX_BOUNDARIES_ON_IMPORT YES

Set the absolute accuracy in ProE same as the positional tolerances in Alias. Be careful about the following settings in Alias; Max Gap distance, Topology distance, curve fit distance and trim curve fit. In my experience, export/import using STEP, gives the best results. Ensured that the model is stitched before exporting to ProE.

Add the following options for IGES transfer. IGES does not contain solid information. Subsequently the surfaces need to be joined/merged in ProE, either automatically or manually to get a valid topology.

IGES_OUT_ALL_SRFS_AS 128
IGES_OUT_SPL_CRVS_AS_126 YES
IGES_OUT_SPL_SRFS_AS_128 YES
IGES_OUT_MIL_D_28000 NO
IGES_OUT_TRM_SRFS_AS_143 NO
IGES_OUT_TRIM_CURVE_DEVIATION DEFAULT
IGES_IN_106_F2_AS_SPLINE NO
IGES_IN_DWG_LINE_FONT YES
IGES_IN_DWG_PNT_ENT YES
IGES_IN_DWG_COLOR YES

Please add your comments and feedback.

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