Conversion from JT to Siemens NX is not supported yet :(

The JT format is a widely used lightweight 3D data format designed for efficient visualization, collaboration, and sharing of complex 3D models and assemblies. JT files retain the fidelity of the original 3D models while minimizing file size, enabling fast loading and efficient data transmission. The format supports features like precise geometry, polygonal meshes, product structure, PMI, and animations.

Support of JT in CAD Exchanger

CAD Exchanger can import files compliant with the JT formats from 8.0 to 10.5 and ISO14306:2012 and export files compliant with the JT formats 9.5 and ISO14306:2012. Such support includes:

• B-Rep representations;
• polygonal representations (incl. multi-LODs);
• assembly structure, including via external files;
• names;
• user-defined and validation properties;
• PMI;
• colors, materials, textures;
• layers.

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Pros of the format

Advanced compression and economical data representations

Advanced compression and economical data representations

This file format employs advanced compression techniques to reduce file sizes without compromising the quality of the content. This enables efficient transmission and storage of 3D models and other visual data.

In addition to compression, JT excels in economical data representations. The format is structured in such a way that it is relatively easy to read in a selective manner. Files typically have smaller file sizes than STEP files with comparable geometry. This is achieved by efficiently representing mesh data through topological compression algorithms, which take advantage of the connectedness between mesh patches. Despite the economical representation, JT files maintain their integrity and provide a comprehensive visualization of the original content.

Great meshes support

The format is designed to handle complex 3D mesh data efficiently, making it ideal for applications that require high-quality mesh representation. JT allows for the precise encoding of mesh data, including vertex positions, normals, texture coordinates, and more. It supports both triangular and polygonal meshes, enabling the representation of intricate geometric shapes with smooth surfaces.

Moreover, JT provides robust support for mesh attributes and properties. This means that additional information, such as material properties, colors, and transparency, can be associated with individual mesh elements or the entire mesh.

Cons of the format

Proprietary legacy

While the ISO standardization brought greater openness and interoperability to this format, the legacy of its proprietary history can still be observed in certain cases. It's worth noting that the specifications for JT 7.x and earlier versions were not publicly accessible, and the format was essentially proprietary, so there were difficulties in reading and writing this format in other CAD software. Fortunately, these versions of files are not used much these days.

Implementing full-fledged JT support can be a demanding task. It requires a deep understanding of the intricacies of the format's specifications and algorithms. This can be a barrier for smaller software developers or independent implementers who may not have the resources or expertise to fully grasp and implement the complexities of the format. As a result, the quality of JT support can vary significantly.

Another consequence of the proprietary nature of the JT format is its lack of openness. The latest JT precise geometry representation is based upon the Siemens PARASOLID, which means a high-quality implementation of the format must also be able to read and write this format.

FAQ

Is JT format specification publicly available?

Yes, it is. The JT Open Program, an industry consortium dedicated to promoting the widespread use of JT as a 3D data format, provides the JT file format specification to the public. It offers various resources, including technical documentation, whitepapers, and specifications related to the JT format. These resources can be accessed on the official JT Open Program website.

What are JT file extensions?

The JT format typically uses the file extension ".jt" to denote JT files. It is worth noting that alternative file extensions may also be used in certain cases, depending on the software or system. However, ".jt" remains the most commonly used and recognized extension for JT files across different platforms and applications.

How to open a JT file?

To open this file, you will need a compatible software application, for example, CAD Exchanger Lab. Launch the software and navigate to the 'New file' option. Browse your computer's directories and locate the .jt file you want to open. Then select it and click "Open". Once the import process is complete, the .obj file should be loaded into the software, allowing you to view and interact with the 3D model and associated data.

History of JT format

The JT format, also known as Jupiter Tessellation, has a long history that traces its origins back to the 1990s. It was developed by Engineering Animation Inc., a company specializing in computer graphics and visualization software. EAI created the JT format as a lightweight and versatile solution for visualizing and sharing 3D data in industries such as manufacturing and engineering.

In 2001, EAI was acquired by UGS Corporation, which later became Siemens Digital Industries Software. Siemens recognized the potential of the JT format and continued its development, expanding its capabilities and promoting its adoption in various industries. Over the years, Siemens has worked to enhance the format, improve its compression techniques, and ensure compatibility with a wide range of software applications.

The JT format gained further recognition and acceptance when it was standardized by the International Organization for Standardization in 2012 as ISO 14306. This ISO standardization solidified the JT format's position as a reliable and widely supported file format for 3D visualization and data exchange. Today, the JT format continues to evolve and is utilized by numerous companies and industries worldwide for effective collaboration, efficient data sharing, and immersive 3D visualization.

Siemens NX is a proprietary format developed by Siemens Digital Industries Software and is optimized for seamless interoperability and efficient data exchange within the NX ecosystem. This format enables users to preserve the integrity and accuracy of their designs while facilitating collaboration and facilitating various engineering processes throughout the product lifecycle.

Support of Siemens NX files in CAD Exchanger

CAD Exchanger can import .prt files from v5 to 2212. Such support includes:

• B-Rep representations;
• polygonal representations (including multi-LODs);
• assembly structure (via external files);
• names;
• graphical PMI;
• colors.

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Pros of the format

Synchronous Technology

It is a capability integrated into the Siemens NX format that provides significant advantages for engineers and designers, including flexible editing, faster design iterations, easy collaboration, and enhanced design reuse.

Synchronous Technology allows for direct editing of geometry without being constrained by the traditional parametric modeling approach. Designers can easily modify and manipulate geometry without the need to track and update a complex history tree. Moreover, changes can be made directly on the model, providing instant feedback and allowing for quicker design optimization.

Integrated Product Lifecycle Management

One of the key advantages of the Siemens NX format is its seamless integration with Teamcenter PLM solutions. This integration allows for comprehensive product data management, including design, simulation, manufacturing, and collaboration, all within a unified environment. The tight integration of PLM capabilities ensures data consistency, reduces errors, and improves collaboration throughout the entire product lifecycle.

Cons of the format

Proprietary nature

Because the NX file format is specific to Siemens NX, developers may encounter challenges when trying to exchange data or collaborate with users or systems that utilize different file formats. This can require additional conversion or translation steps, which may introduce complexity and potential data loss or inconsistencies.

Furthermore, working with a proprietary file format restricts developers from leveraging open-source or third-party libraries and tools that are not designed to work directly with the NX format. This limits the flexibility and extensibility of developers' applications and may require more effort to implement certain functionalities.

Cost

The Siemens NX format refers to high-end CAD software, and it comes with a corresponding price tag. Compared to some other CAD tools, the licensing and maintenance costs for NX can be relatively higher. This may make it less accessible for individual users or small businesses with limited budgets. However, it's worth noting that the comprehensive features and robust capabilities of NX often justify the investment for larger organizations or industries where its unique strengths are crucial.

FAQ

What industries is the Siemens NX format commonly used in?

The Siemens NX format is widely used in industries such as automotive, aerospace, machinery, and many more. It caters to the needs of professionals involved in product design, manufacturing, and simulation.

Can the Siemens NX format be used for 2D drafting?

Yes, the Siemens NX format supports both 2D and 3D drafting and modeling. It offers a comprehensive set of tools for creating and editing 2D drawings, as well as designing complex 3D models.

Does CAD Exchanger have any limitations related to the Siemens NX format?

Yes. Siemens NX assemblies are represented with external files and it's possible for an assembly to contain components saved by different versions of NX. In case some of the components are saved by an unsupported version of NX, CAD Exchanger will not be able to load them and they will be omitted from the imported product structure.

How to open a .prt file?

To open this file, you will need a compatible software application, for example, CAD Exchanger Lab. Launch the software and navigate to the 'New file' option. Browse your computer's directories and locate the .prt file you want to open. Then select it and click "Open". Once the import process is complete, the .prt file should be loaded into the software, allowing you to view and interact with the 3D model and associated data.

History of Siemens NX format

The NX format has an interesting history that traces back to the early 1990s. It was initially developed by Unigraphics Solutions, a company founded in 1969 and later acquired by Siemens AG in 2007. Unigraphics, which later became known as Siemens Digital Industries, introduced the first version of the NX software suite in 1996.

Over the years, NX has evolved into a comprehensive and powerful CAD and CAM solution. With each new release, NX has consistently pushed the boundaries of innovation and set new industry standards. It has become a perfect choice for professionals in various industries, including automotive, aerospace, and industrial machinery.

The NX format itself has been constantly refined and enhanced to support advanced modeling techniques, simulation capabilities, and data management. It offers a range of features, such as parametric modeling, assembly design, digital simulation, and more, allowing engineers and designers to create and optimize complex products with efficiency and precision.

Today, the Siemens NX format is recognized as a leading CAD format, known for its robustness, flexibility, and compatibility with other industry-standard formats. It continues to evolve and adapt to the ever-changing needs of the engineering and design community, empowering users’ capabilities.