Advice for CAD Translation and Drawing Services for Your Company’s CAD Files

Sharing digital documents is now an easy process thanks to the likes of cloud storage and fast large-data transfers, but things are quite different with CAD files, mainly because of the different formatting standards. In fact, there’s no single industry standard in file format for CAD design services; the closest you can get to a “standard” comes in the forms of neutral formats, such as IGES (Initial Graphics Exchange Specification), Parasolid, STL (StereoLithography), DXF (Drawing Exchange Format), STEP (Standard for the Exchange of Product Data), and ACIS.

The problem is that some CAD software cannot save files in a neutral format. Instead, they use proprietary (or native) formats to be able to store metadata in the files they create. To transform a native file into a neutral format, a conversion or translation is necessary. But conversion isn’t always a straightforward process. Details can get lost, annotations may disappear, geometric data may be broken, parametric design history is nowhere to be found, and so forth, because a single mistranslation can lead to costly issues like project delay, development setbacks, and even poor quality. CAD file translation must be handled with uncompromised precision and great attention to detail. Cad Crowd is the go-to platform where companies, big and small, connect with professionals for accurate CAD file translation.

🚀 Table of contents

File conversion best practices

Obviously, the biggest advantage of using a neutral CAD file format is compatibility. Although errors in converting a native file to a neutral format aren’t always error-free, there are ways to mitigate the risks.

Built-in conversion tools come first

A lot of popular CAD software applications actually allow you to export their native files and save them as one of the neutral formats. The applications facilitate the export and import (basically conversion and/or translation process) using the built-in tools that encode the files accordingly. As with applications of all sorts, it’s advisable to use the latest stable versions or releases to ensure compatibility. The table below lists some of the most widely used CAD applications that offer support for neutral formats that are also utilized by architectural design services and product design firms.

No tool is perfect for every purpose. While the built-in tools almost always work with certain formats, there may be times when you have to work with some other proprietary native files that are unsupported by any of the applications listed in the table. It’s also possible that you just don’t have access to those applications because you use an entirely different software package. For example, a project requires you to convert a DWG file (the native format for AutoCAD) to DXF, so you can work with it on Blender. Unfortunately, there’s not yet a functionality in Blender with which you can directly import DWG. This means you need a separate third-party tool (either software or an online app) to handle the conversion beforehand. 

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Clean up and optimize

As part of the preparation for 3D CAD translation services before the conversion process, clean up the original drawing by removing unnecessary elements. Make sure the file has no unused blocks, layers, or any objects that aren’t supposed to exist in the final image. There is plenty you can do to clean up and optimize the source file, for example, using the “save as a new image” option. Quite possibly the easiest first step of optimization, saving as a new image will automatically get rid of redundant settings and data. You may want to save with a different name each time to keep track of the file history.

The built-in optimization tools can be useful as well. For example, software like Rhino, Fusion, and SolidWorks offer practical commands to cut down the number of polygons from drawings. Such an option can keep the file size low, but at the expense of image quality. BricsCAD comes loaded with the BLOCKIFY command to search for similar objects or repeated geometries and replace them with block references instead. AutoCAD is equipped with a few optimization commands, such as Audit, Recover, and Purge. In essence, the commands check if there are elements you can remove safely without affecting file integrity. Another example is the Shrinkwrap tool in Autodesk Inventor, which simplifies an assembly or complex part into a more compact element. 

Detaching Xref might be helpful to reduce the file size. In AutoCAD, you may use image attachments and Xref when creating a custom hatch pattern. They’re indeed helpful, but only if you can’t achieve the same result with the already available ones. Therefore, detaching any custom Xref (when possible) helps optimize the file.

Software updates

One of the most common issues with CAD conversion services is file incompatibility, even when the software actually supports both the source and targeted formats. Bear in mind that file formats also have their own versions or releases. For instance, SolidWorks 2024 works just fine with exporting or importing neutral formats, including all versions of DXF, Parasolid files version 9.0 – 35.0.x, STL version 1, and IGES version 5.3. It also supports STEP files as long as they’re created using the AP242, AP214, and AP203 Application Protocols. All other versions of the same neutral formats are unsupported; they’re incompatible.

This issue isn’t exclusive to SolidWorks. Many software packages only support specific versions of neutral file formats, most likely the latest ones. Incompatibility isn’t always an impossible challenge; you need to open it using the version of the original application used to create the file in the first place, and then re-export it to a compatible format before running the file through a further conversion process. 

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The right method for the right result

Manual conversion is probably the most reliable, but it’s a time-consuming and labor-intensive effort. Automated conversion software offers an easy, practical, and almost instant way to get the job done, at least when the process runs without a single hiccup, so you never have to manually recheck everything. Outsourcing the task to a professional CAD conversion freelancer probably makes more sense, as it pretty much relieves you from all the hassles while still getting great results at an affordable rate. Evaluate your options and methods by considering such factors as accuracy, complexity, and (conversion) volume.

There’s no right or wrong method here, but you may find that a particular option is more efficient than the others based on constraints, including budget and time.

Documentation

Always save at least two copies of the source CAD file before starting the conversion process. In the event the conversion fails to produce the expected result due to glitches, errors, corrupted data, or any kind of issues, a backup gives you an immediate fallback action. Redundancy is, in general, a good practice when dealing with file conversion.

Maintain an organized documentation of the conversion process, including the software/tools used (don’t forget the version number), date/time of conversion, unexpected errors in the converted format, and any relevant notes. If you’re working as part of a team, the documentation should serve as a valuable reference when communicating with everybody else. 

Validate and test

This goes without saying: nothing is more important than maintaining file integrity when converting a CAD drawing. Essential properties (of the source file) like dimension, geometry, layers, scaling, and lines must be preserved and remain intact in the converted format. Make sure to note the units of measurement used in the source file and check if they’re correctly translated in the converted format. After the conversion process, immediately validate the new format by comparing it to the original file. A side-to-side comparison makes it easier to identify errors and discrepancies.

Data loss recovery

Automated conversion from native to neutral file formats is prone to data loss. This should come as no surprise because the conversion process itself often removes or modifies information in the file; conversion modifies the data created by the original software to make the file readable in other applications. For instance, neutral file formats like STL, STEP, and IGES contain no information about parametric design history. Even when the source file is created using software that typically stores such information, the conversion process may remove it entirely. Apart from design history, some geometric data may get lost during conversion as well, leaving you with a degraded CAD file that lacks crucial bits of information that may be crucial for CAD drawing services.

Some applications provide tools to recover missing information after conversion. Autodesk Inventor has the Quality Check and Refit Face commands, which allow you to perform an analysis of specific data sets and repair them. Fusion includes the “Find Features” tool to discover parametric design features, but it is available only in direct modeling mode. SolidWorks also has an auto repair function, which attempts to solve issues with corrupted files.

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Takeaway

CAD files are the backbone of architectural projects, product development, and technical design of all sorts. As companies grow and businesses expand, these files serve as crucial points of reference in a project that requires collaboration between multiple design teams and stakeholders. Ideally, everyone involved in the project should access the file using the same software for efficiency, but sometimes this is neither the most efficient nor the most budget-friendly option for everyone. When two or more stakeholders use different software packages, CAD file translation/conversion is an excellent method to foster effective communication across the teams.

Professionals at Cad Crowd understand that file conversion isn’t as simple as translating one format to another. CAD files are often packed with loads of technical data that must remain intact, even when the format itself has transformed from native to neutral. It takes an in-depth understanding of how these files were created and what information they contain to ensure that the translated/converted drawings aren’t just correctly formatted, but also technically accurate. Request a quote today.