In CATIA, NIP typically refers to generating unique identifiers, codes, or laser marking data for parts and sub-assemblies. This is often a time-consuming task when done manually on large assemblies. Here is a draft of a helpful feature guide for a CAD newsletter, internal wiki, or tech blog.
Feature Spotlight: Mastering the NIP Activity in CATIA Subtitle: Stop manually renaming parts. Here is the best approach to automating Numerical Identification of Parts (NIP) for large assemblies. For designers working in aerospace, automotive, or heavy machinery, the NIP activity (Numerical Identification of Parts) is a critical step in the PLM process. It ensures every washer, bracket, and panel carries a unique, traceable identifier for manufacturing and logistics. However, performing NIP activities manually in CATIA V5 or 3DEXPERIENCE is prone to human error. A single digit mistype can ripple downstream, causing headaches in ERP systems and procurement. In this feature, we explore the best practices for handling NIP activities, transforming a tedious manual chore into an automated, error-proof workflow. The "Old Way" vs. The "Best Way" The Old Way: A designer opens the properties of each part individually and types in the part number string (e.g., ASSY-001-SUB-BRKT-01 ). In an assembly of 5,000 parts, this takes days. The Best Way: Utilizing CATIA’s Knowledge Pattern capabilities and Macros to propagate NIP data based on hierarchy, geometry, or external rules.
Best Practice #1: The Intelligent Part Numbering Macro The single most effective "best" method for NIP activity is automation via scripting. Instead of typing, you run a script that applies logic to the assembly tree.
How it works: A Visual Basic (VBA) script iterates through the selection set (or the whole assembly). The Logic: The script applies a naming convention. For example: nip activity catia best
Root Assembly: PROJECT-1000 Sub-Assembly: PROJECT-1100 Part: PROJECT-1110
The Benefit: It creates a clean, hierarchical indentation in your specification tree instantly.
Pro Tip: If you are on the 3DEXPERIENCE platform, use the "Rename" functionality within the Collaborative Business Process rather than local VBA scripts to ensure the database stays in sync. Best Practice #2: Leverage "Design Tables" for NIP If your NIP activity involves generating matrix codes or standardizing hardware, Design Tables are your best friend. In CATIA, NIP typically refers to generating unique
The Setup: Create an Excel sheet defining your NIP codes. The Connection: Link the CATPart parameters (specifically the Part Number property) to the Excel columns. The Result: When you update the Excel sheet, CATIA automatically updates the NIP codes for every component linked to the table. This is "Best" because it creates a single source of truth outside of the CAD environment that Project Managers can review without opening CATIA.
Best Practice #3: Parameterized "Smart" Strings For the most robust NIP activity, stop hardcoding numbers. Use CATIA Parameters to build strings dynamically. Create a set of parameters in the Root Product:
ProjectCode (String) = "A320" ZoneCode (String) = "LW" (Left Wing) Sequence (Integer) = 001 Feature Spotlight: Mastering the NIP Activity in CATIA
Then, create a Formula for the Part Number: Part Number = ProjectCode + "-" + ZoneCode + "-" + Sequence Why this is the best method: If the project code changes (e.g., from a prototype to a production code), you only change the Root Parameter , and every single part in the assembly updates its NIP code automatically.
Troubleshooting Common NIP Issues Even with the best tools, CATIA can be finicky. Here are two common fixes: