ALIAS TECHNICAL SURFACING – NURBS FROM MESH

Posted on November 28, 2010 by graham bullock B.Ed. Design and Tech

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Technical Surfacing

NURBS Class A Surfs from Mesh Data

Technical Surfacing

NURBS Class A Surfs from Mesh Data

Here’s a short video. I will try to find time to put up a longer one when I have some time.

Technical Surfacing in Alias

The mesh data is from a 1:4 scale Clay Model and has been scaled to 1.1 in Alias

In an Automotive Design Studio this data typically contains inaccuracies and it is one of the jobs of a Technical Surfacer to Reverse Engineer new surfaces, which measure -up to Class A specifications

My student here has created x-secs from the mesh,

converted them to nurbs crvs and then started to rebuild the mesh data in order to produce very accurate surfaces.
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Alias Tutorial Modeling a Mirror – nurbs – cad Part – 6 end.

Posted on November 20, 2010 by graham bullock B.Ed. Design and Tech

Trim-Out the Front Quarter-light

From your sideglass and use it as the base for the triangular Mirror Base Plate

A Prod. mirror has an elaborate hinge mech. with channels to take wiring, but as we are making a basic mirror, we don’t need to worry about that

Just make a telescopic joint, which if you wish you can make oval in section

Project 4 crvs onto the triangle the one in the front corner should be very short (circa 2mm). This is a very common trick in NURBS modeling, we often make a seemingly triangular shaped surf, by using a square, which has 3 visible bound and one very short one.

All proper surfs in Alias must have four boundaries

Once you have built this “triangular surf” you can transform it with the Proportional Modification Cont. to make it look like an injection moulding

Blend your teliscopic section onto the “triangle” at one end and the mirror head at the other

If you have got this far

Well Done You!

Now if your boss asks you to model a vehicle mirror, you’ll have a fair idea, as to where to start

If you need to accelerate your Alias learning and need to do a training course with me, just email me with your details

Kind Regards

graham bullock B.Ed. Des & Tech.

Come an learn Alias or Boost your current Alias skills to FULL Pro. Automotive entry level

www.learningalias.co.uk

I am busier than ever these days

with contract modeling, teaching one to one students from all 5 continents and now of course my brand new website has gone live and it is possible to learn Alias Automotive to a professional level for the lowest rate on the planet.

Pictured below is an Audi A5 Sportback built by one of my students who is now a Digital Sculptor for GM.

Full HD video, just click the picture below

I am now putting some of my tutorials on YouTube, so whilst you’re there you may wish to check them out. There’s a full tutorial on how to create a Ball Corner to Class A Surfacing, Catia V5 spec.

Click Here for Videos

To see just how quickly you can learn Automotive Modeling, with a Pro. Alias Trainer to help you

NURBS FROM MESH VIDEO click here

Check-Out my Customer Feedback,

Many of my students make it to the top and succeed in becoming pro. Alias Digital Modelers. The hourly rate is very high and there are vacancies in UK. France, Germany, USA, Brazil etc.

On my website I teach you how to build the models you need to get accepted at interview. Why not take a look?

Cheers

graham bullock

To Learn Alias Automotive to Industry Entry level has been made easier.

For student’s who have the objective of finding a CAD job in the near future, I still teach One to One students and all of these students get Automotive Modeling or Design/Modeling jobs, so it’s a great investment to make. The hourly rate is very high and there are vacancies in UK. France, Germany, Sweden, Spain, USA, Brazil etc. I can only take a maximum of 5-7 students at any one time. I teach all levels right up to Post Graduates. I have never had a Private student fail to get an Alias Automotive job (Companies include Ferrari, GM, Lotus, Opel, Audi Seat etc. ). If you wish to apply for a place, please email me with all your details.
Why not visit my website and take a look for your self?
Over 100 videos on many, many aspects of Learning Pro. Alias
I show you how to build a Complete Audi A5 Sportback (ext.) . Over 50 Videos on that alone !

Info. on Courses:

“Course #1”.

6 Months website access to all website based video tutorials, 167 Euros (215 USD equivalent Sept. 2012)

“Course #2”.

167 Euros (215 USD equivalent Sept. 2012) per month. You get your .wire reviewed by me every 15 days and you will receive : feedback, instruction, tips and advice from me personally. Access to all videos including my ” Private Student Training Videos”. You will build at least 3 complete automotive exteriors. The course also includes an intensive Reverse Engineering section, which required by most employers.

“#3 Full Pro. “Elite” Course”.

Fast Track Full Pro. “One to One” Course with weekly reviews and coaching 200-250 Euros (USD. 260-320 approx. Sept. 2012) per month. One to One Private tuition. You will receive specific geometry and meshes and modeling from me personally where required, to help you to complete your exteriors quickly to an Industry entry level standard. This means a bigger investment, but once in an Alias modeling job you will get back what you invested many times over and be able to work anywhere in the world

NB: Typically students pay 50% of the cost of the “Elite” course by monthly installments settling the balance over time, once they have an Alias Automotive contract.

For more info,

Just register on my website and I’ll send you all the details
www.learningalias.co.uk

USA:

If you are in the USA, just register and login, then go to Profile and you can pay your subscription with your US credit card. Absolutely no extra charges for currency conversion.

Regards

Graham Bullock B.Ed.(CNAA)Des.Tech.

Alias Tutorial Modeling a Mirror – nurbs – cad Part – 5

Posted on November 20, 2010 by graham bullock B.Ed. Design and Tech

(Class “A” Catia V5)

Here’s a Production Mirror Head, Built to catia V5.

You will notice that I haven’t used either the free-form or Surface Fillet Tools, as these are not accurate enough for most of the complex filleting required for Catia V5.

Often I will build Freeform/Surface fillets and merely use them as slave surfs to develop more accurate surfs , which have perfect G2 or G3 crvtr. conditions

For most work the above tools are fine, but for tight prod. work being data transferred to other software down-line, I use Rail surfs.

“C” the Myth About Curvature Green Flags

For most of my Prod. work I use Catia V5. with fillet curvature G1 or Green Flag =”T”

This type of modeling is very precise, has good visual qualities and is accepted by down-line software

Curvature Flags I use as my guide to local boundary curvtr. cond. on large surfs that comprise 2 or more sub-surfs.

Production Modeling Techniques

Soon to be available in training form on my new website

www.learningalias.co.uk

How and Where to use Construction Planes

If you want pro. surfs

You must build them from Pro. Curves

and that means that your crvs, must be planarized between ends

Mostly I use 3 point PLs

Plane “A”

I have created with the Dynamic Section crv. I took the Dyn.Sec. from the original Free Form Blend. Once I had the x-sec. I deleted the slave blend, converted my x-sec. crv from deg 3,33 to deg. 5,1

I then Aligned the deg. 5 crv, del. it’s hist. and adjusted it using the Comb to get a nice visual fillet sect.

Plane “C”

Is a 3 point CP.which I projected onto the Mirror Back surf to align my crv. to (the COS went right across the surf, but I hv, truncated it for neatness)