CAID2 Advanced level step 2

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.

 

Day 1

Repetition from CAID1

  • Use your private network folder
  • Make a backup of your project (image links...)
  • Alias likes diskspace!

An Autodesk Alias project from scratch

  1. Make a new Project and rename it
  2. "Slam the door", Set Current Project :)
  3. Working units in Alias. Whats the goal? Construction Presets
  4. Grid spacing, Perspective grid extent size
  5. Make a simple Boundig box
  6. Drag and drop some background sketches. Position and scale
  7. Save and finally start to 3D-model your design

  Useful tools

  • Construction planes. Remember the GEOM-button
  • Use layers (and maybe stages) Careful with colors
  • Windows management and Cameras. Make a Render Camera
    (Windows Priority)
  • Object info, Information window
  • Difference between pick Object and pick component (surf, curve...)

3D Web Links (free stuff to download)

 

 

 

3D-scanning possibilities

Laserscanning. VIU-scan from Creaform

Structure light scanning, XBox kinect, The stucture sensor

Photo scanning

Agisoft PhotoScan vs. RealityCapture

Review from 3D scan expert: 3 (almost) free mobile 3D scannings apps

Laser
  VIUscan _250px 

 

"IPad-scanning" (Structered light)
IPad _ScanningIPad 3D-Scanning 101

Open _IPad _scanned _file _GIFOpen an IPad scanned file in Meshmixer

MeshMixer Tutorial Part1 : Modeling for 3D Printing

 

MeshMixer
Layer by Layer - How To Make Voronoi Patterns in MeshMixer

Makehuman.org
If you need a special model!

 

 

Assignment #1
Combine NURBS and polygon models for 3D-printing.

  1. Scan an object or person (polygons, mesh)
  2. Add your own objects in Alias (NURBS surfaces)
  3. Download and add Solid models, surface models or polygon models

Make it all into a 3D-printable file  :)

Export the Rapid Prototyping (stl)   file(s).

KeyShot (or VRed) endering and

Pictures from Meshmixer showing it is a "leakage free" model

Real life scanned data has to be used and

Combine NURBS and polygons in some way. Photo, laser or IPad-scanner can be used.

CAMBROloginENG

 

Day 2

Data transfer

  • Export proccess, Neutral file formats, STL, OBJ, IGES and STEP
  • 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
  • Close
  • Attach
  • Detach

Working with surfaces

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

Modeling strategies

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

Assignment #2 MC-fairing, Curvature Continuity

Modeling and rendering a MC Fairing

TN_Fairing .persp

 CAMBROloginENG

 

Day 3

Working with curves

  • Rebuild curve
  • Offset
  • Extend, shorten

Surface construction Tools with continuity control

  • Square
  • Birail
  • n-sided
  • Extrude
  • Multi surface draft

Trimming trim, trim divide, untrim

  • Defined by: 
  • Projection
  • Intersection
  • Geometry Mapping
  • New curve on surface, manual construction
  • Trimming for data transfer, Trim problems
  • Filleting Other methods

 

 

Day 4 and 5

  • Evaluation tools
  • Tolerances
  • Rational Vs. Non-rational Geometry
  • Additional detailing
  • Move CV-tool 
  • Combining surface and solid-modeling.
  • Change one surface in a solid model with Alias and export it back to a solid tool (SolidWorks)
  • Control and marking of your course status

 

Assignment #3 Export for milling
Later during the Project (in week 46):

Steps for Exporting Milling files (step or iges) and pictures showing the objects position in space. Use your Shower Gel Bottle or own 3D-model.

 

 CAMBROloginENG

 

 

 

To Pass

  • Save pictures and 3D-model files with Cambro.
  • TIFF orPNG-format for the pictures
  • 1920x1080 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

Resources:

 

3D Web Links (free stuff to download)

.