3D Scanning and Printing

For the scanning i used the Kinnect Primesens, and scanned my torso.

The application ReconstructMe, downloaded on a trial version here

http://reconstructme.net/projects/reconstructmeqt/#buynow was used to interface with the Kinnect and generate the mesh.

after a few trials, i used a combination of static camera and me rotating on the chair, with the camera completing the upper parts and hidden surfaces by moving rotating as well.

the resulting STL was surprisingly good :

torso mesh scan original

it had some bits and pieces flying around, and little mesh problems (and spheres floating, generated by ReconstructMe trial version).

some mesh problems  and naked edges (shown in magenta)CaptureNaked Edgesafter a brave and short attempt to fix the mesh by myself with rhino mesh repair tools, i tried the NetFabb service of mesh repairs http://cloud.netfabb.com/

CaptureNetFabb

works out just perfect:torso mesh scan_s

with some nice details of fabric, hair etc…torso mesh scan back_s torso mesh scan detail_sI experimented with printing with the RepRap.i turned the model to be standing (and not lying), in order to get the less support material possible

downloading Slic3r and Pronterface is needed to generate the Gcode and as an interface for the printer.

Capture1

the reprap pronterface is downloaded in its wiki page :

Capture5Capture5.2

once installed, i import the STL into the Slic3R, to generate a GCode. i uploaded ohad’s config fileCapture2. then generating the Gcode

Capture4Next step is controlling the RepRap from the Pronterface. Setting the temprature, warming up nozzle and plate, homing the head.

importing the Gcode generated in the Slic3r, and printing.

The print resulted like that: IMG_3668 wrong configuration for infill…lots of air between the layers

Captureconfigwhen changing the fill density to 0.2 mm, a more proper result was printed:

Torso_Densethe front details were a bit too fine for the scale and resulotion of the Reprap, and support material and the “real” model got mixed a bit

tosro front

 

Next, i did a tryout with  the same STL in the Shopbot milling, to see the opposite technique over the same file

(it just requested the slicing of the model in Rhino, to get a flat back, as milling cannot operate full 3D. then closing the mesh with FillHoles )

torso milling sliced

 

milling it in simple Polypropylene, small scale, resulted like that: (some fine details of the coat ! )
torso milling

I then experimented with a parametric code, in Grasshopper, that could generate an STL, in the format of wide public applications for the design and self production of goods.

the code generates a ring, based on various parameters to be set (inner diameter, height, thickness, type of polygon  etc…). the code can be downloaded here

CaptureRhinoCaptureRhino2“baking the ring’, the resulting mesh is waterproof and correct STL for printing

printing ringa

on a totally different scale and purpose, i printed an architectural model, with the Zcorp

architecture model_Yekevas the powder serves as support in this technique, floating elements, overhangs etc can result very clean :

architecture model_Yekev_1Sarchitecture model_Yekev_2S

 

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