CAID2 for TD

Time to 3D Design and prototype!

  This 3-point course is in the first year of Master and is a part of "Advanced Computer Aided Modeling and Visualization". (The other part is CAD)

The CAID program used is Autodesk Alias Automotive on Windows based workstations.

Goal and contents

Students are given training in CAID on a deeper level in order to be able to create advanced 3D models and make effective visualizations.

The aim is to give a more in depth knowledge of the tools in a CAID program.

 

Concepts covered:

Understand the different modeling strategies available to maximize modeling efficiency.
Determine the softwares role in the design workflow.
Customize construction tolerances and linear units.
Construct efficient curves with optimal parameterization and minimal geometry
Define G0, G1, and G2 continuity and the importance of each to curve and surface construction
Manipulate curves using the tools found in the curve edit palette
Understand the criteria for primary and transitional surfaces
Construct primary surfaces using the set planar, revolve, skin, extrude and monorail surfacing tools

Construct transitional surfaces using birail, square, fillet and round
Understand when and where the options related to continuity and rebuilding of surfaces should be applied
Edit surfaces using freeform CV pulling and precise manipulation methodsEvaluate curves and surfaces to ensure desired curvature and continuity characteristics.  Create stitched models for Boolean operations or output to solid modeling packages


Understand the process of data transfer as it relates to their designs to other CAD systems. An overview of the merits and limitations of various file transfer formats (i.e.: IGES, STEP etc.), tips and traps will be provided
Prepare models for successful rapid prototyping output

 

Prerequisites

Completion of CAID 1

Form of tuition

Tuition is in the form of lectures and practical training under the supervision of tutor. In the computer lab, exercises will be carried out under the guidance of authorized teacher. All sections in the course are obligatory.

Examination form and marks

Examination is in the form of individual practical tests and presentation of results of the given exercises at the school.

In order to obtain credit for the 3-points course, all sections and assignments must be successfully completed. Students receive a mark of either Pass or Fail for each assignment and section. For those students who do not receive a mark of pass, another opportunity is provided to pass the assignment or examination after a period of time.

 

Alias Foundation Tutorials

Autodeskautomotivetraining.com

Day 1

Do you need to repeat some parts of the CAID1 course?     ;)

Browse through the videos in chapter 6!

F6 Aligning & Matching Surfaces &Curves

 

Assignment #1 Block Model

F7.1 Make a Block Model from a Mesh

Download Course Files Unzip and find  F7.1_Sports_Car_Mesh.wire

Upload one Alias file and 3 nice images. 

  • Simple Block Model. Gaps is ok!
  • Rendered with just Alias own  Hardware shade
  • High Quality, Tesselation and Anti-Aliasing
  • Think about High Lights,reflections and shadows
  • Export three TIF images 1280 x 1024 pixels
  • Save the Alias-wire file

 

 

 

 

F71_Block _Model _240p

 

Block Model Random Colors 240p

 

  

Block Model CVs _240p

Day 2

Finish your assignment #1
the Block Model

Data transfer

  • Export proccess, Neutral file formats, STL, OBJ, IGES andSTEP
  • Modeling for export to CAD, milling or rapid prototyping
  • Moving files, Network, Rapid Prototyping and Milling How to:s

Visit to the Rapid Prototyping and Milling facilities

  • Do´s and dont´s

Using pheripherals Digitizing with Microscribe

 

Curves

  • Good curves?, Anatomy of NURBS, Continuity, Edit point Curve

Working with curves

  • Tangents, Normals, Curvature, Curve and surf Continuity,
  • Multiknots, Multiplicity What? 
  • Close and Open, Periodic Why?
  • Attach and Detach

Working with surfaces

  • Adjust intersection, Make a Pocket
  • Align
  • Symmetri Plane Align
  • Project tangent

Modeling strategies

See also: Autodesk Automotive Training

  • Design criteria
  • Modeling requirements
  • Analyzing the design
  • Approaches to modeling
  • Goal?

Preparing your 3D-model for CNC Milling

Here some steps:

  1. 1:1 scale in millimeter [mm]
  2. IGES igs, STEP stp (and occasionally OBJ or STL)
  3. Single file (can have multiple parts!)
  4. Gaps smaller than the milling tool is ok (8 mm dia.)
  5. Clean file only export surfaces (occasionally curves as well)
  6. Import it again and check it again!

YES! you can have gaps when milling. :)

Gaps need to be smaller than the milling tool

 

Assignment #2 Milling

  • STEP or IGES (STL)
    Export Milling files (normally step or iges) and pictures showing the objects position in XYZ-space.
  • Model
    Use an old model from CAID1 or your own 3D-model. Maybe download a 3D-file.
  • Size
    The model must enclose a volume with the height of 40mm and about 110 x 70 (the size of a computer mouse)

 Upload

  • Alias wire-file
  • A milling file STEP or IGES (occasionally STL)
  • Image  showing the models position on the Grid
  • Two renderings of the complete model (not the milling file)

 

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

Mill _Assignment _TL01

 

 

 

 

 

 

 

 

Day 3

Continue with the
assignment #2 Milling

 

Skill Building W1 Concept Modeling

 

 

 

 

Mill

Day 4

Finish your assignment #2
Milling

 

Patterns

Continue the Alias Skill Building

Follow the learning videos:

 See also: Autodesk Automotive Training

 

  

 

Day 5

A bug or a feuture?

  • Clipping Planes
  • Tesselation and Draw Precision
  • An extra Render Camera
    • Wide Angle Lens

Improve your rendering

  • Tesselation, a smooth Mesh. More polygons
  • Anti-Aliasing, blur the "pixels steps"
  • Ambient Occlusion (also called ambient shadows)
  • Think about High Lights
  • Reflections and
  • Shadows, Smooth and blurred
  • DOF. Depth of field. Blur you image by editing the camera
  • Use wide or tele Lens, change the camera settings

Assignment #3 Rapid Prototyping

Export a Rapid Prototyping (stl)   file(s). Renderings and pictures from NetFabb basic (free) showing;

  • it is a "leakage free" model
  • contains only one volume
  • No borders
  • Real life scanned data has to be used and
  • combined in with other geometry in some way. Photo, laser or IPad-scanner, downloaded files and your own models could be used

 Upload

  • Alias wire-file
  • The Rapid Prototyping STL - file (occasionally OBJ)
  • "Screen dump" from Netfabb Basic without errors!
  • Two nice renderings

 

 

 

Image from georgehart.com

Day 6 and week 2

Working with curves

  • Rebuild curve 
  • Offset 
  • Extend

Scan 3D objects and people

Some different 3D-measuring technologies:

Easy tools for polygon modelling

Meshmixer   tutorials:

 Mudbox tutorials:

MakeHuman:

School pages:

 

 

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Day 7

Visit to Sliperiet Fab Lab

Surface construction Tools with continuity control

  • Square 
  • Rail
  • n-sided 
  • Extrude 
  • Multi Surface Draft

 

 

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Day 8

Assignment #4

Modeling and rendering a MC Fairing

Manage Blend Curves

Trimming trim, trim divide, untrim  

  • Projection
  • Intersection
  • Geometry Mapping
  • New Curve On Surface, manual construction
  • Trimming for data transfer, Trim problems
  • Filleting Other methods

 

 

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TN_Fairing .persp

Day 9

  • Evaluation tools
  • Tolerances
  • Rational Vs. Non-rational Geometry
  • Additional detailing
  • Rigs

 

 

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Day 10

Hint's on the MC Fairing

 

 

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Day 11

Assignment #5

Render using emissive materials or light objects. Example Rear and Head Lights or interior lightning.

Raybounces

  • Example with a Wine glas
  • Caustics

HDRI backgrounds

  • On the Web:   Google Search
  • On the school server 1
  •    \\130.239.61.251\...
  •    ...CAID-folder \HDRI_Material
  • On the school server 2:
  •    \\130.239.61.240\hdri

 

 

 

HDRI_240

Day 12

More possibilities in the VRed visualizing software.

Example: render passes!
Control and marking of your course status

 Kanal von VREDPRO

VRed help and quickstart
VRed overview webinar
VRed Tire Mapping
VRed Motion Blur (wheels/bkg)

ID7320-P: Become enlightened regarding light simulation with Autodesk VRED

ID7343-P: High End CGI Production with VRED

ID7319-P: A Swedish Moment

VRED Essentials Lighting Tutorial

 

 

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VRED

 

 

 

Volvo _Tail _Light _240p

 00:16:54 into

 

 

 

 

 

 

 

 

Day 13, 14 and 15

Workshop, finish up exercises and tutorials
Presentation of exercises 
Control and marking of your course status

 

  

To Pass

  • Save pictures and  3D-model files with Cambro.
  • TIFF or PNG-format for the pictures
  • 1280x1024 pixels size
  • Alias, STL, IGES and STEP format for the 3D-files
  • Upload all files through the CAMBRO portal:   CAMBRO log in


CAMBROloginENG

 

Place

Top PC Lab
Located in the top floor of the administration building at the left.

Student computer lab time
Monday to Friday 0900 to 1600
Wednesday 0900 to 1200

Tutor computer lab time
Monday to Friday 0900 to 1400
Wednesday and thursday 0900 to 1200