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DIY scanning for 3D printing: an
overview
Sophie Kahn, Natalia Krasnodebska
and Lauren Slowik
Why 3D scan?
3D scanning brings real-world
objects into the digital realm
-Save modeling time
-Scale up or down
-Modify or...
Types of 3D
scanning
-Laser line
-Structured light
-Photogrammetry
-Time-of-flight
-Contact
To create a
Kinect scanning
setup
-Office chair that spins
-Bright lamp
-Microsoft Kinect v1 or v2
-Kinect drivers and SDK...
DAVID structured light/laser
scanning
DAVID
laserscanner
You will need:
-Focusable laser diode and battery
pack, or laser level from a hardware
store
-Webcam: t...
DAVID
structured light
You will need:
-Pico projector
-Calibration panels
-Webcam (the higher-res and
higher fps, the bett...
-White spray paint or removable
spray powder (talc developing
spray, dry shampoo)
-White play-doh for registering
multiple...
Steps to make a
DAVID scan
-Set up calibration panels at 90
degrees, using a set square for
accuracy
-Calibrate camera
-Pr...
Repairing files for 3D print
What does a 3D printer
need in a file?
-File must be “watertight” (one solid form, no holes)
-File must have no geometry e...
Workflow to
prep scan for
3D print
-Fill holes in scan file &
make solid (Meshmixer)
-Smooth and sculpt
(Meshmixer)
-Repai...
Repairing files with
Meshmixer
Fill holes in
Meshmixer:
Edit->Close Cracks
Edit->Make Solid
Smooth in
Meshmixer:
Edit->Brushes->Shrink
Smooth/Bubble
Smooth/RobustSmooth
Steps to repair
in Netfabb
Basic
-Fill any remaining holes using rt-
click->Fill Hole
-Remove unnecessary shells
-Run basi...
Additional steps
in Netfabb Pro
-Wrap part surface if object is
severely corrupted
-Reduce triangle mesh to
<1,000,000 pol...
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
Diy 3d scanning for 3D print - Makerfest India
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Diy 3d scanning for 3D print - Makerfest India

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Diy 3d scanning for 3D print - Makerfest India

  1. 1. DIY scanning for 3D printing: an overview Sophie Kahn, Natalia Krasnodebska and Lauren Slowik
  2. 2. Why 3D scan? 3D scanning brings real-world objects into the digital realm -Save modeling time -Scale up or down -Modify or remix objects -Output them in different materials, using different technologies (3D printing, CNC milling, etc)
  3. 3. Types of 3D scanning -Laser line -Structured light -Photogrammetry -Time-of-flight -Contact
  4. 4. To create a Kinect scanning setup -Office chair that spins -Bright lamp -Microsoft Kinect v1 or v2 -Kinect drivers and SDK -Skanect software
  5. 5. DAVID structured light/laser scanning
  6. 6. DAVID laserscanner You will need: -Focusable laser diode and battery pack, or laser level from a hardware store -Webcam: the higher res and faster fps the better (I use The Imaging Source) -Printed calibration panels -Cardboard/plywood -Set square
  7. 7. DAVID structured light You will need: -Pico projector -Calibration panels -Webcam (the higher-res and higher fps, the better) -Small desktop tripod -Dual head for tripod -Two rotating ball tripod mounts -Turntable (optional but helpful)
  8. 8. -White spray paint or removable spray powder (talc developing spray, dry shampoo) -White play-doh for registering multiple scans -Black spray paint -Black painted blocks to serve as props -Helping hands tool -Black velvet to mask out background Useful accessories for 3D scanning small objects:
  9. 9. Steps to make a DAVID scan -Set up calibration panels at 90 degrees, using a set square for accuracy -Calibrate camera -Prepare and stabilize your object -Scan in sweeps, rotating object and flipping as needed -Register scans in DAVID Shapefusion -Fuse surface and export
  10. 10. Repairing files for 3D print
  11. 11. What does a 3D printer need in a file? -File must be “watertight” (one solid form, no holes) -File must have no geometry errors (all polygons face same way, etc) -File must be correct thickness -File must be structurally sound
  12. 12. Workflow to prep scan for 3D print -Fill holes in scan file & make solid (Meshmixer) -Smooth and sculpt (Meshmixer) -Repair geometry (Netfabb) -Export .stl for printer (Netfabb)
  13. 13. Repairing files with Meshmixer
  14. 14. Fill holes in Meshmixer: Edit->Close Cracks Edit->Make Solid
  15. 15. Smooth in Meshmixer: Edit->Brushes->Shrink Smooth/Bubble Smooth/RobustSmooth
  16. 16. Steps to repair in Netfabb Basic -Fill any remaining holes using rt- click->Fill Hole -Remove unnecessary shells -Run basic repair & apply -Trim object and removed trimmed parts if necessary -Fix any bad geometry by deleting and re-adding triangles -Run basic repair one last time -Export as .stl
  17. 17. Additional steps in Netfabb Pro -Wrap part surface if object is severely corrupted -Reduce triangle mesh to <1,000,000 polygons -Hollow model to desired wall thickness -Add drain holes using Boolean operations -Run wall thickness visualization to check structural integrity

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