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Break Free of the CAD History Tree

Break Free of the CAD History Tree

We’ve heard it time and again from future customers “Rebuild errors are costing us time and money." So have others. Another CAD company recently did a blog about the problem and were even so kind as to show a very broken parametric history tree. In fact, they even demonstrated how the software highlighted the broken geometry. Basically, the history tree is what is broken, and they show it. history tree.jpg

That’s great. But our question is, “Why worry when you don’t have to?”

Direct CAD, such as that used in KeyCreator, eliminates the need to not only worry about rebuild errors. In fact, it removes them altogether. 

When you’re working in a traditional, history-based parametric CAD system, you are held captive by constraints and limitations, so every change — and let’s face it, there are always changes during the design process — needs to be considered and first steps need to be rebuilt to ensure the geometry works.

Typical rebuild errors occur when attempting to edit and continue design on someone else’s model.  You need to fully understand and comprehend the parametric history tree to be able to make modifications without causing rebuild errors. Essentially, if you don’t understand HOW somebody designed the model, you cannot work with it. This can slow down the process and the profits of a company.

When your 3D CAD software is Direct CAD, you are not working on the history tree; you are working on the part directly (see how we did that, you work directly on the model with Direct CAD). That means an 11th-hour change or a quick change during prototyping won’t fail because of a step made weeks earlier not being updated.  Reworking a file to get it ready for production won’t require changing a line in the history tree that is a hundred or thousand steps back because you are changing the model, not the history tree—kind of like working with clay.

And contract manufacturers know the pain of receiving files that are already full of broken geometry that can take even more time to fix.

As with any creative process, everyone has different approaches to design; therefore, wasting a lot of time on restarting models from the ground up due to the inability to work with others’ models. It would be like rebuilding a house because you need to fix the roof. That’s a lot of time and money lost on what is essentially unnecessary rebuilds just because you aren’t sure the development of the foundation was originally done. Thincomputer error.jpgk of it as having to study and perhaps rebuild the electrical system of your house every time you need to change a lightbulb. Sure, you could do it.  But why?

Direct modeling gives you the capability to easily and quickly copy/add/remove/duplicate and edit features without having to design each element individually so your time is spent more usefully designing, manufacturing and obtaining more jobs.

So, while you could still be using a typewriter, carrying a 1,000-page book, and using the Encyclopedia Britannica. You’re not. You use a word processing program, carry 100 books with you in your Kindle, and Google the answers to life’s greatest questions. So, why are you still worrying about rebuild errors?

Maybe you should Google that one.

 

Learn more about the power of Direct CAD in our Interactive Guide Direct Modeling 101

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