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 Re-Use Your CAD

Archive for March, 2014

Neutral CAD Files have benefits (Part 2) – 3D PDF and STEP

Thursday, March 20th, 2014

Neutral CAD files are great, but remember the source of that neutral file.

The most common and ubiquitous file format used to communicate product design and manufacturing requirements is to generate a 2D pdf from the native CAD drawing. Consider that this communication method generates a digital file that is a neutral derivative of the 2D Native CAD drawing, which is a derivative of the 3D CAD model.

Derivative: Data duplicated or extracted from the original. A copy of a derivative is also a derivative. (ASME Y14.41 (R2012), 3.11)

A “neutral” 2D PDF drawing is actually a 2nd derivative of the Native CAD model.

Most likely your organization is already using some form of neutral files already, what makes it more interesting and data rich, is adding in the third dimension to your product definition.

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Neutral CAD Files Have Benefits (Part 1)

Thursday, March 6th, 2014

3D CAD and model-based ideas are fostered by NIST (National Institute of Standards and Technology).

Let’s start with defining a Neutral CAD File. A neutral CAD file is a CAD format, generally governed by a commercial, government or international standard and is “open source”. Many can write it, and many can read it. It is not a CAD specific, proprietary format.

Now, also bear in mind, that a Neutral CAD File, is generally a derivative of the Native CAD format. Meaning it is a copy of the original file. Consider how that derivative file is used downstream in the product development lifecycle, and what relationship, if any, it has back to the originating source data.

This is where I make YOU work. Which is the master? Do you have a feedback loop to the source design data? Do you need to feedback to the source data?

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