NX Open Automation: A Beginner's Guide for Mechanical Engineers

Many mechanical engineers rely entirely on the Siemens NX graphical interface, unaware of the immense power sitting just beneath the surface: the NX Open API.

Why Learn NX Open?

If you find yourself clicking the same 15 buttons every time you set up a new drawing sheet or export a specific file format, you are wasting valuable engineering hours. NX Open allows you to write scripts (in Python, C#, Java, or C++) to automate these tasks.

Getting Started with Python

Python is the easiest entry point for NX automation. Siemens provides a robust Python API.

The best way to start is by using the Journaling feature.

1. Go to Developer -> Record Journal.
2. Perform your repetitive task manually.
3. Stop recording.

NX will generate the code for exactly what you just did. While the recorded code is often messy, reading it is the fastest way to learn how the NX Open API structures objects and methods.