Feature repair

Due to differences between CAD systems, there will sometimes be features that need to be repaired to create a fully featured part model after migration. The techniques of feature repair are beyond the scope of this user's guide, but a few basic guidelines are presented. Repair in NX The recommended approach is to make any necessary repairs in NX. This will maintain associativity to drawings and assembly constraints. The basic process to repair part features is to repair the feature, and then replace the following B-Rep feature to re-create the chain of associativity. 1. Where a feature in the migrated part history is not migrated, a Data Access Feature (DAF) is created to provide information on the missing feature from the original CAD system. A B-Rep of the part at this point is created, and subsequent features are applied to this B-Rep. After repairing the feature, replace the following B-Rep feature with the body created by the prior features using the Replace Feature command. Continue this process to restore the chain of associativity up to the last B-Rep. 2. Use the Convert to Linked Body on the final B-Rep of the part. Edit the new Linked Body feature using the command Edit Parameters. From the WAVE Geometry Linker dialog box, use the Replacement Assistant to automatically map the entities from the featured model to the Linked Body using the Geometric mapping method. This will preserve associativity to assemblies and drawings. Use the NX command Convert to Linked Body as part of the repair process to maintain assembly constraints and drawings. After repairing features, use this command to replace the final B-Rep in the part history with a linked body to maintain associativity. Siemens PLM Software recommends attending training in migration and feature repair before you begin this process with production data. Repair in the original CAD system Sometimes parts can be repaired or modified in the original CAD system to make the migration more successful. If the original CAD system is configured with Teamcenter to store one version per item revision, modifying the data in the original CAD system will create a new item revision. Because a new item revision has been created, the model can be migrated again, but this is technically not a remigration. Remigration works within the same item revision. If an assembly or a drawing references the specific revision of the part, modify the assembly or drawing to reference the new item revision. If the assembly or drawing has not been migrated yet, update it in the original CAD system to reference the new component. If the assembly has already been migrated, use Replace Component. Best practices

Best practices