3D Scanning and Printing

Week 6 - 3D Scanning and Printing - NOTES

General info

Things to do

Questions to ask

Useful resources

Assignment

Group assignment

  • Test the design rules for your printer(s) (group project)

Individual assignement

  • Design and 3D print an object (small, few cm) that could not be made subtractively
  • 3D scan an object (and optionally print it)

Raw class notes

Weekly reviews :

class :

3D printing is usefull but also oversold Refer the one button kitchen

Christoph Laimer Tourbillon (3D printing watch)

  • It makes complexity much more accessible

  • access : you can print

  • waste

Lots of constraints

gallery of failures

3D printer don’t autamatically perfect prints

PLA is one of the best material

there is a wide range of material

DEpending on the technology there is resolution limit

There is research on speed up time, because 3D print takes a long time

material could be expensive

supports, some are removable

post processing

design rules

sharp corners cannot be print perfectly

minimum wall thickness

minimum clearance

Angle to not have support depends on the machine capabilities

anaestethics, we see the lines of the filamenent

Check 3D Printer tolerance test on thingiverse

Group assignmenent :

  • How sharp corner can you make
  • How thin can wall be ….

STL is high resolution

stereolitography was the first techno FormLabs stops showing printer on desktop cause they are messy gluy machines

neri oxman glass printing

contour printing large scale

FDM fused deposit modelong

powder printer to print with colors powder make its onwn support

polyjet are expensible machine that use droplets

amuzing process mcor technologies sum 2D printing to make 3D print

eos laser sintering systemes (SLS)

formlabs is releasing 10k€ laser sintering (Fuse 1)

2 steps processes: carbon cell MIM metal injection molding

print + heat

micro rapid prototyping

Assemblers

machines

  • RepRap bowy was the 1st, to make other machines

  • Ultimaker, made by a fabalab in NL comercial product

  • Makerbot

Sindoh DP200 neil favorites, there is a special version for fablabs to programe the chip in the cardridge, use cartdridges 3dwox dp201 1000$ friends of fablabs

Desktop metal (former student), lower cost metal printing

FormLabs, messy, but high resolution (stop motion movie project)

materials

Proto pasta ninja flex

vendors

shapeways additively Ponoko Moog

Files Formats

STL does not contains units !

use a program to generate trangles

PLY, is like STL but with colors

OBJ

No DXF is terrible

AMF, 3MF is a tentative to replace STL

distance flieds use by antimony define as tree

Assignement design and 3D print an object (small, few cm) that could not be made subtractively

=> Use sketchfab for integration

Slicing : Replication G, slicer, Curra

Scanning

Tomography 1M$ machine 1 micron

Scanned probe (Modela)

…

use an arm to measure some points

laser scanning (FabScan)

Lidar : RPLIDAR 360 200$

Array illuminationNextengine

Emerging technology time of flight

Photogrammetry : popular, lots of photos and lots of maths, OpenMVG Is not metrology, the dimensions looks but are not good

Speckle : Depth mapping using projected patterns

Recommended : 3DSystems Sense, nice object, sends out spectral pattern, and analyse the return. Esiest affordable techno Keep the distance, smooth rotation 400$

Structured light (research) can be high resolution cellulon.com, using pattern by a pico projector

light stages hollywood, a alot of lights, a lot of cameras Research project => scan of Obama

digital Emily

SLAM Simultaneous Localisation and Mapping

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