Paul Hamilton of CoCreate has a blog entry that I wanted to share with you. He talks about the confusion in the market in 2009 over history-based versus history-free modeling.
He makes some good distinctions between what some of the large history-based parametric companies are trying to do versus what true 3D Direct Modelers are today.
He also correctly comments that 3D Direct modelers are making large gains in terms of functionality and productivity, where the history-based modelers are not. I believe the history-based modelers are focusing on PLM and PDM, because their modelers are complex and need complex and costly PLM and PDM solutions.
This is an article written by John Groener of Edge Data. He is a reseller of both AutoDesk and Kubotek CAD software. I hope you enjoy his perspective and find it informative and educational. His contact information follows.
Versus History-Based Modeling
History-Based Modeling was implemented in Pro/Engineer® and quickly imitated by
several "Me-Too" CAD products such as CATIA®, SDRC IDEAS®, and UniGraphics®.
Then came the "Mini-Me-Toos" such as SolidEdge®, SolidWorks®, IronCAD®, and
modelers require the CAD user to define parameters and constraints when
designing a part. The parameters provide relationships to other features in the
3D part, and constraints allow that part to be constructed unambigously.These
parameters, features, and constraints are stored in the order they were built
in the history tree and must be accessed through that tree to be changed.
Modelers have shortcomings.
Engineering changes can be a difficult, painful process. A new user has
to decipher and untangle the history tree so that he can make changes.
Each CAD software package has its own proprietary file format so parts
are not easily interchangeable.
Assemblies can be time consuming to set up and manipulate.
There is no stand-alone 2D drawing
Surface models are not easily interchanged
uses Direct Modeling to create and edit 3D Models. NO user-defined history tree
is needed. Why? Because KeyCreator creates the feature tree and KeyCreator
allows direct dimension driven editing.
In other words parametric, feature-based editing of all geometry.
has Comprehensive 2D drafting. KeyCreator produces complete 2D drawing sheets
associated to the 3D model. KeyCreator uses levels (aka layers) to manage 2D
information, so 2D drafting can be standaone if desired.
Reads Native CAD Files from other CAD software like Pro/E, Solidworks,
Unigraphics, CATIA, Parasolids, ACIS, STEP, IGES. No fixing, no healing, just
read it in, edit, and GO! Wait ... how
about the parametrics? That's KeyCreator's job. No need to use the import as
reference geometry and re-parameterize it. Just go to work.
incorporates surface modeling. With KeyCreator you can create a free-form
surface model and then convert it to a solid model to facilitate operations
like shelling and fillets. Excellent healing tools insure that the part is
completely contiguous and accurate. KeyCreator is therefore a TRUE Hybrid
Modeler (a hybrid of solid and surface models).
assembly modeling features can manage all data in a single file. It does this
by using level management - that same invaluable 2D tool which is noticeably
absent in the other Solid Modelers. For very large assemblies, KeyCreator can
export parts in the assembly to multiple part files and then reference those
parts as entities.
is a complete Mechanical CAD solution with a unique ability to read any CAD
data format and then easily manipulate geometry, making it an invaluable
resource for any engineering design and manufacturing application.
and Edge Data
Did you know
KeyCreator®, formerly known as CADKey®,
was introduced in 1984 as a CAD Package with 3D Digitizing capabilities.
Corporation purchased CADKey in 2003, renamed the software KeyCreator, invested
heavily in R&D, added advanced 3D, CAM, and universal CAD translation.
... Edge Data,
one of the first AutoCAD dealers in the country, has been providing New England
with CAD products and training since 1983?
Data is an Authorized Kubotek Service Center, and provides CAD training for
KeyCreator and other software.
My experience at Kubotek
does not date back to CADKEY, but in fact it is hard to ignore the
history.Even Dr. Kubo himself has a
long history with CADKEY as a former dealer and now CEO.I am often told by our current dealers and
customers that the history of CADKEY is very important to the future of
KeyCreator.I am amazed at the loyal
customer base that will start a conversation by stating when it was they first
started using CADKEY.Yes, of course
there were some rocky roads and users and former users alike will have no
problem telling you when they were and yet here we still are preaching the
benefits of direct, explicit, hybridmodeling.We resisted the move to
parametric modeling with the one belief that one CAD paradigm does not fit all
and after all these years it is obvious the rest of the industry agrees.
My point to this blog is
not to start another argument of direct vs constrained modeling, but instead to
embrace the history of CADKEY and to thank our long time passionate, dedicated
users and to pass on our excitement for the future.Yes, we are now Kubotek and yes KeyCreator
made some significant changes, but just like the 1996 world champion New York
Yankees looks different than the power house 2009 New York Yankees, there are
links to the past that help us understand the tradition.I wanted to end with two requests that came
through our website that links the past to the future.I removed names to protect the innocent.I think this sums it up.Past and present!We value it all.
one of the first partners with CADKEY(back in the late 1980’s). I wrote the
external DXF to CADL bidirectional translator for the early CADKEY bundles. I
do some personal designing and would like a quote (email is sufficient) on the
current prices of KeyCreator. Thanks, glad to see you have survived as well as
you have. I know back when I was working with you things were just getting off
the ground. “(By
the way Thomas, we will contact you to get you a copy.I would love your feedback).
“During my Junior and
Senior years at Unnamed High school, I took a year-long Pre Engineering and Architectural
design class In the Patricia A. Hannaford Career Center with a Mr. Rick
Unnamed. I became very proficient in the use of KeyCreator and enjoyed how easy
it was to pick up. I am now enrolled in the Mechanical Engineering program at
Unnamed College and am trying to learn on Sold Works, with little success. I’d
like to download your trial and hopefully convince my professor how simple it
is to use and how ridiculously complex and un-necessary some of the things we
go through on our current program are.”
Thank you to our long
time loyal customers and also to our new customers. We look forward to serving
you for the next 25 years!