Download - Inside 3 d printing presentation lisa
3D Scanning: The Bridge Between the Real World and the Computer
www.scansite.com
Lisa Federici, CEOScansite3D
Booth #620
Presented at ‘Inside 3D Printing’
Santa Clara, CA10/21/2015
• Three axes (X,Y,Z) arranged in an orthogonal pattern
• Probe can be run by a computer or operator
• Measurements are offset to compensate for size of probe
CMMCoordinate Measurement Machine
LiDARLight Detection and Ranging
(Time of Flight Scanners)
• Based on the Speed of Light
• Calculates time it takes laser to reach object & reflect back to sensor
• Millions of laser pulses return to sensor to calculate distance
• Rotating laser & sensor (usually via a mirror)
• Scanner can scan full 360 degrees around itself.
• Ability to scan from moving vehicle
LASER
• Most common scanning worldwide
• Uses triangulation
• The scanner analyzes where the laser interacts with the object relative to the laser source.
• All data from scan is analyzed and a digital representation is created.
• Projects moiré fringe pattern onto the object
• Video Camera records how features on object distort patterns
• Scanner analyzes distortions & creates 3D digital representation
Structured Light
Resolution? Sampling Density?
What does it really mean?
How many points are collected in a given area?
Low Resolution High Resolution
Data from scanner with lower point collection
Data from scanner with high point collection
Accuracy?
How close is single point to true surface?
• Translucent / Shiny surface
• Merge Errors
• Autofill
• Wrong Scanner
Even $200,000 Scanners Require Some Processing
Line of Sight issues & holes
reduce the quality of data
Software programs can analyze data and fill
holes, but hand editing produces best results.
Post-scan data Post Editing
Structured Light Scanner – Pre Editing
Structured Light Scanner – Post Editing
The World’s First Digital Dinosaur
• 1905 - first mounted Triceratops in the world.
• Bones fragile - traditional method of latex molding impossible
• Bones had Developed Pyrite- Disease in which the mineral pyrite grows inside the bone and breaks it apart from the inside.
• Bones from at least a dozen Triceratops were used to make original mount
• Skeletal elements from different individuals shown as different colors
• Foot bones of a duckbill dinosaur
What We Discovered
• 2 scale models made from SLA of all 256 individual bones
• First biomechanical studies ever done
• 15% larger skull, created through scanning and SLA prototyping
Rendered scan data
• CNC properly scaled replacement parts to correct mismatches
• Milled parts were better quality than ‘filler’ bones made by hand.
• New posture based on biomechanical studies
The ‘Fix’
New Posture
Old Posture
New skull scaled 15%Made from SLA pattern
‘Flora & ‘Priapus’ Metropolitan Museum of Art
4 Months of Editing per Sculpture
3D Inspection of Two 1962 Ferrari GTOs
1962 Ferrari GTO #2
Two Scan Data Sets Overlaid on One Another to Highlight Differences
Scanning a 1954 Ferrari Mondial for Body Restoration
Structured Light Scanning using Photogrammetry Markers
3D Scan Data
SolidWorks Model
3D Scanning
• Document the fragments
• 28 Major Fragments Digitally Reconstructed
• CAD files were create over the reconstructed digital data
• FEA used to determine stress Points
• Fiberglass pins were placed in each ankle and right knee
• Holes were filled with marble and epoxy & colored to match the original stone
EDIT!
EDIT!EDIT!
& EDIT Some More!
Structured Light Scanning + FEA
Redesigned Racecar
Structured Light Scan Data CAD File
Helicopter Cowling
3D Inspection & AnalysisCAD File Overlaid on
3D Scan Data
Good Data is
Essential for
Good 3D Prints
No Post Processing
3D Scan Data on the Left
Finished Bronze Reproduction on the Right
High Quality 3D Data is
Essential for High Quality
Prints!
Scan Data of “Le Magnifique“
Installation at Pittsburg Penguins Stadium
The Cloisters CrossThe Cloisters Museum
Required Photogrammetry for Exact Alignment
5 days of scanning
4 months of editing
The Cloisters Cross The Cloisters Museum
½ “ Bevel
CoppermanAmerican Museum of Natural History
Cut Planes
Support Structure Built in CAD
Close Up of Detail
Copperman Plaster 3D Print
Printing a heart to practice to reduce possible errors during actual surgery
Santa Barbara CourthouseSpirit of the Ocean Fountain
3D Scanning: The Bridge Between the Real World and the Computer
www.scansite.com
Lisa Federici, CEOScansite3D
Booth #620
Presented at ‘Inside 3D Printing’
Santa Clara, CA10/21/2015