Technote |
099 |
| Date: | 04/11/95 |
| Author: | SRS |
| Product: | FreeForm Machining |
| Version: | 4.x |
Applicable CAD System and Translator Version:
CAD System Name: CATIA CAD System Version: V3R2MR3 CAD IGES Translator Name: CATIA Interface-CATIGS, CATCLN, CATMOD functions CAD IGES Translator Version: n/a Hardware Platform: RS/6000 or Mainframe Source(s): n/aSteps in Conversion Process:
1. Pre-Processing on the CAD System: .1 Run CATCLN on your CATIA model. This cleans up the model database. .2 Run CATMOD to delete text, points, and dimensions, and to drop and explode details (which would otherwise become IGES Subfigures). When you run CATMOD, you should read your CATIA model and write another, temporary CATIA model. The CATMOD functions are: Function & Commands Description ------------------- ----------- FUNCTION DETAIL MANAGE DROP Drop detail (subfigure) references to the standard CATIA library. FUNCTION SYMBOL MANAGE DROP Drop symbol (subfigure) references to the standard CATIA library. FUNCTION DETAIL EXPLODE NESTING -1 TYPE SPACE Explode details (subfigures) and dittos (subfigure instances) into separate model entities. FUNCTION DETAIL DELETE UNUSED Delete unused details. FUNCTION SYMBOL DELETE UNUSED Delete unused symbols. FUNCTION TEXT ISOLATE Isolate text from views. FUNCTION ERASE SELECT *SOL + *VOL + *SKI + *TXT Deletes solids, volumes, kinematics, and text. FUNCTION AUXVIEW TRANSFER SNGLVIEW SCALED Transfers all entities into a single view. .3 Convert offset surfaces to spline surfaces, using CATIA interactively or using CATMOD. .4 Explode solids into surfaces using a utility or interactively. .5 Include only the surfaces you need to export to FFM. Delete the surfaces you do not need. 2. Export to IGES: .1 CAD IGES Export Instructions: .1 Run CATIA to IIF and IIF to IGES to convert your CATIA model into an IGES file. .2 CAD IGES Export Translator Settings: Variable Value Description -------- ----- ----------- 1. CATIA to IIF (CATIGE) settings: CON STANDARD Mapping of Conics as Conics or convert to another curve type. CAN PARAMETRIC Mapping of Canonical surfaces as Canonical, Parametric Spline, or B-Spline (NURBS) surfaces. Canonical surfaces are: Ruled Surface, Surface of Revolution, and Tabulated Cylinder. SPLINE PARAMETRIC Mapping of spline curves and surfaces as Parametric Spline or B-Spline (NURBS) curves & surfaces. IGESVRS V4 The version of the IGES standard file to write (V5 is even better). IGESSTD STANDARD Whether to write a standard or IBM-specific IGES file. MSGLEVEL ERROR Level of error messages to report. ERROR reports all. 2. IIF to IGES (CTIREDIT) settings: IBMPRP NO Output IBM specific properties? SIGFIG CORD 14 Number of significant digits for coordinate values. SIGFIG COEF 14 Number of significant digits for coefficient values. MAXERR 0 Maximum number of errors allowed (zero = unlimited). Note: The most important CATIA settings are the SPLINE, CONIC, and CANONICAL settings. 3. Import into SmartCAM: .1 (See TECHNOTE.082 IGES EXPORT SETTINGS -- ANY CAD SYSTEM) 4. Post-Processing in SmartCAM: .1 Checking and debugging the model: .1 (See TECHNOTE.082 IGES EXPORT SETTINGS -- ANY CAD SYSTEM)