However, with parametric modeling being the methodology of choice for design professionals everywhere, using it was a no-brainer – it made perfect sense not to try to reinvent the wheel. Starting from scratch has enabled us to think differently, to approach the product design process from a different perspective. Onshape is relatively new to the market, unburdened by decades of “best practices” and preconceived ideas. Six Ways Onshape’s Design Tools Are Fundamentally Better Needless to say, whether you’re designing a radiation detector or a ballpoint pen, models should not have minds of their own. An engineer at a radiation detection company recently told me he watched the holes on a back panel of an assembly “unexpectedly float around” the last time he tried in-context design with his old parametric CAD system.
Many companies have been bitten by this once too often and have literally banned the use of in-context references altogether!įeature tree or Christmas tree? Nobody wants a gift like this. Parts are now incorrect and may be manufactured that way. Features fail, or worse, they don’t fail but the geometry has changed unpredictably with no warning or indication that an update has taken place. If a part that is being referenced changes, moves, is deleted or cannot be found, your feature-tree lights up like a Christmas tree. Many “best practice” documents are in existence today to educate users on how to circumvent these issues.Ī good (or bad) example is designing parts relative to other parts in an assembly, otherwise known as in-context design. Inherent weaknesses in creating geometry and referencing other parts of a design can cause models to be flaky and unpredictable, or require more work than is necessary to complete a task. However, parametric modeling is not without problems. Other modeling technologies have tried to gain market acceptance, but parametric modeling has proven to be more reliable, more robust and more powerful, enabling engineers and designers to create new products in record time.
This is a huge time-saver and helps to reduce design errors. Changing dimension values – or adding, editing, reordering or deleting features – automatically updates a part’s geometry and all associated downstream deliverables, such as assemblies and drawings. The beauty of feature-based parametric modeling is that engineers can create solid models with an ordered list of understandable modeling features (sketch, extrude, fillet, shell, etc.). For over 30 years, feature-based parametric modeling has been the gold standard for creating complex parts and assemblies and is used in production every day by hundreds of thousands of companies worldwide.
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