To Assemble a STEP Model in an Existing Assembly
1. Open an assembly and click Component > Assemble > Assemble.
2. In the Open dialog box, select All Files (*) or STEP (*.stp) in the Type box.
3. Select a STEP part or assembly file from the list of files displayed.
4. Click Import. The Import New Model dialog box opens.
5. Retain the import profile in use or select an import profile from the Profile list. Click Details to customize the profile settings in the STEP — Import Profile editor.
6. Click OK in the Import New Model dialog box. The Component Placement tab opens.
7. Accept the default coordinate system or select a coordinate system as reference to position the geometry.
8. Package the imported part or subassembly component in the assembly or add associative placement constraints.
9. Click on the Component Placement tab. The STEP part or subassembly component is imported and assembled in the assembly model. The import log file is automatically generated in the working directory.