How to convert Parasolid
to STEP?

Parasolid file format is native for Parasolid geometrical kernel, a widely used 3D geometric modeling kernel developed by Siemens PLM Software. This kernel provides a set of advanced tools and algorithms for creating, editing, and analyzing complex models. Like any kernel, Parasolid also has a persistence format known as Parasolid-XT. The Parasolid format refers to the file format used to store and exchange 3D geometry data created using Parasolid.

Support of Parasolid files in CAD Exchanger

CAD Exchanger can import files starting from v0.15 and up to v35 and export files from v12 to v35. Such support includes:

• B-Rep representations;
• assembly structure;
• names;
• user-defined properties;
• colors;
• layers.

Follow this link to check out all the CAD Exchanger products.

Pros of the format

Kernel nature

The primary advantage of Parasolid-XT lies in its kernel-based architecture. When you need to import data into CAD software running on the Parasolid kernel, opting for this format is a wise decision. As a kernel format, Parasolid-XT excels in its handling of B-Rep geometry, demonstrating exceptional proficiency in storing intricate B-Rep models encompassing solids, sheets, wireframes, mixed components, and even non-manifold topologies.

A notable advantage over the ACIS-SAT format is its capacity to represent the model hierarchy, albeit with some limitations (parts and bodies are somewhat synonymous). Nevertheless, in essence, the conversion to Parasolid-XT has the potential to preserve your part-assembly hierarchies, adding to its appeal as a preferred choice.

Representation of hybrid models

Another notable capability is the endorsement of hybrid models, specifically those in which a single logical component encompasses both B-Rep and mesh geometry. While this scenario currently represents a relatively small portion of real-world data exchange, it's gaining popularity. Consequently, the Parasolid kernel has been actively advancing to embrace these models, with the most recent iterations of the Parasolid-XT format designed to handle them.

Cons of the format

Proprietary nature

Parasolid is a proprietary format owned and developed by Siemens PLM Software. This means that the specifications of the format are not publicly available, and only licensed software developers can fully access and utilize the features of Parasolid. While many CAD software applications support the import and export of Parasolid files, the lack of public specifications can limit the ability to develop custom tools or work with the format outside of the licensed software ecosystem.

The lack of extensive metadata and visual attributes support

Parasolid-XT offers some support for metadata and visual attributes, including the ability to name entities, assign colors to shapes, utilize layers, and user-defined properties as key-value pairs. However, if you're dealing with multi-body parts, PMI, or advanced metadata, it might be more beneficial to consider using alternative formats like STEP or JT. These formats provide more extensive support for those specific requirements.

FAQ

What are the benefits of using Parasolid format?

The Parasolid format offers exceptional interoperability, and precise B-rep modeling ensures high geometric accuracy, making it suitable for complex engineering and design tasks. Its wide industry adoption makes it a trusted and standardized format, ensuring compatibility and long-term support.

Which industries use Parasolid format?

The Parasolid format finds extensive use in various industries due to its versatility and precision. Industries such as aerospace, automotive, manufacturing, consumer electronics, and medical devices all rely on Parasolid for 3D modeling and design. Its broad adoption across these sectors facilitates the development of everything from aircraft components and automotive designs to medical implants.

What are the primary Parasolid file extensions?

In Parasolid, two primary file extensions are commonly used. The first one is .x_t (Parasolid Text), which represents a text-based format. It stores 3D geometric data in a text format, allowing for easy interoperability between different CAD systems. The second extension is .x_b (Parasolid Binary), which represents a binary format. .x_b files contain the same geometric information as .x_t files but in a more compact and faster-to-process binary format.

History of Parasolid format

The Parasolid format, as a file format for storing 3D geometry, has its own history. Developed by Shape Data Limited in the 1980s, the Parasolid format was designed to enable the exchange of 3D solid models between different CAD systems.

In 1996, the company was acquired by Unigraphics Solutions Inc., which eventually became part of Siemens PLM Software. Since then, Parasolid has continued to evolve and adapt, keeping up with the ever-changing demands of the CAD industry.

With its powerful capabilities and efficient representation of 3D geometry, Parasolid quickly became a standard format for CAD software developers. Its widespread acceptance can be attributed to its seamless interoperability. Many leading CAD software applications, including Siemens NX, Solid Edge, and SolidWorks, incorporate Parasolid as their underlying kernel, allowing users to create, modify, and exchange complex 3D models with ease.

Over the years, Parasolid has played a vital role in various industries, such as automotive, aerospace, and consumer goods. Its precision and accuracy have made it an indispensable tool for designers and engineers, enabling them to tackle intricate designs and perform detailed analyses. Today, Parasolid remains a cornerstone in the CAD landscape, empowering professionals to bring their creative ideas to life in the virtual world.

The STEP format is a neutral file format used for the exchange of data in the field of CAD. It can contain data, such as 3D geometry, product structure, attributes, tolerances, and materials.

Supported versions

Below you can find all the specific types of STEP files that CAD Exchanger supports:

AP203 focuses on mechanical design. It is used to exchange 3D models and associated information for product design and manufacturing processes.

Also known as the Automotive Design Standards, AP214 is used in the automotive industry. It includes additional features to represent complex assemblies and automotive-specific information.

AP242 is an advanced STEP version that supports the exchange of product information throughout the product lifecycle, including manufacturing, assembly, and maintenance.

Support of STEP in CAD Exchanger

During import and export, CAD Exchanger supports:

• B-Rep and polygonal representations;
• assembly structure, including via external files;
• names;
• user-defined and validation properties;
• PMI;
• colors;
• layers.

Follow this link to check out all the CAD Exchanger products.

Pros of the format

Interoperability

Since STEP is a neutral file format, it is not tied to any specific CAD software vendor. Almost any software that works with CAD data, and many programs that work with 3D data, can read or write this format.

Geometry and Data Preservation

STEP files are capable of representing complex 3D geometry, including curves, surfaces, and solids. They also store additional information, such as product structure, attributes, and metadata. This ensures that the integrity of the design is maintained during the exchange process, reducing the risk of data loss or conversion errors.

Long-Term Archiving

STEP files are widely recognized as a stable and reliable format for long-term data archiving. Their standardization ensures that the files will remain accessible and usable in the future.

Cons of the format

File Size

Due to their comprehensive nature, STEP files tend to contain a large amount of data, resulting in larger file sizes compared to other file formats. This can pose challenges when it comes to storage, sharing, and transferring files, particularly in cases where limited storage space or bandwidth is a concern.

The larger file sizes can also impact processing and loading times, especially when dealing with complex assemblies or intricate geometries. It may take longer to open, potentially affecting productivity.

Text-based format

The majority of STEP files are written as text files. While it allows for human readability and easy interpretation, it can introduce potential round-off errors in numerical values. These rounding errors may be negligible in most cases, but they can accumulate and impact the accuracy of the model, especially in situations where high precision is crucial.P

FAQ

What is the advantage of using STEP files?

STEP files offer interoperability, preserve geometry and associated data, are platform-independent, and are suitable for long-term archiving.

How to open a STEP 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 STEP file you want to open. Then select the file and click "Open". Once the import process is complete, the file should be loaded into the software, allowing you to view and interact with the 3D model and associated data.

Are STEP files compatible with different CAD software?

Yes, STEP files are widely supported by various CAD software applications. They are designed to facilitate interoperability between different programs. See the full list in the 'STEP format is supported by' section.

History of STEP format

The history of this format dates back to the late 1970s when the need for a standardized method of exchanging product data between various CAD systems became apparent. To address this challenge, the International Organization for Standardization formed a committee, ISO TC 184/SC 4, dedicated to developing a universal format.

After years of collaborative effort from experts and industry stakeholders, the first version of the STEP standard, known as AP203, was released in 1994. It aimed to enable the exchange of data for mechanical and electrical designs. Over time, additional versions of the STEP standard were introduced, such as AP214 for automotive design and AP242 for complete product lifecycle information. These versions expanded the capabilities of STEP, accommodating various industry requirements and advancements in technology.

Today, the STEP file format is widely adopted and recognized as a reliable means of exchanging 3D models and associated data between different CAD systems. It has streamlined collaboration, enhanced interoperability, and improved efficiency across industries like automotive, aerospace, and manufacturing.