I was never scnning before so It’s pretty exciting. I’ve decided to scan myself, so I’ve asked a friend to wakl around me with the Kinecy and capture
360 degrees of my presence. I also had this funny idea to scan myself while showing the tongue as I’m doing often on the photos. When I saw the scan I’ve understood that it was not the best idea since I look like a mutant…
Anyways 3D scanningis cool. Underneath short description of Skanect layout and the process:
Setup the new file:
Scan your object - or you walk around or the object is turmning. You have to capture 360 degrees:
Afterwards you can reconstruct your object with higher or lower fidelity:
And process e.g remove small not wanted disattatched parts:
Kinect is good with scanning
bigger objects, in a
good light. The best is to put Kinect in a stabile position and turn an object e.g. on a rotating chair. It’s also good to have as much
homogenous background as it’s possible.
If you will deal with this things you could reach a good quality of the scanned object. The advantages of this technology are huge, one can scan even the interiors.
3D scanning technology can be applied in 3D graphics, film industry, virtual reality, modeling and 3D printing of the architectonical models and many others.
Anothr scanning technology is:
Roland MDX-20 Milling mashine with a needle used with software
Unfortunatelly I didn’t have time to try it out, still noted tipps for trying it in the future:
3D printing - group assignment
We used for our test a RepRap (3) with a nozzle of 0.4mm. The material we are going to use is PLA 1.75mm filament (3mm filament is available for the bigger nozzle).
Preparng the file
After opening the Cura we open our .STL file (https://www.thingiverse.com/thing:636363) and lay the part flat on the machine bed.
The cura in FabLab Barcelona has saved settings for each machine. Here the screenshot for RepRap 3.
The printing process (RepRap)
Once we have saved the GCode file in Cura we can send it to the printer via Octoprint https://octoprint.org/
3D printing - individual assignment
Substractive and addictive manufacturing
I’m going to model and print an eyeball - I’m curious how the 3D printer will deal with spheral object.
This object is a good example to try in this technology since it can not be easily made in a
subtractive way. Theoretically it could be duble-side-milled, though it will be more tricky and will requires the positioning tricks.
Here I’m showing why it’s a good idea to 3D-print my eyeball:
Preparing the model for 3D printing in Blender
I’m going to base my model on the
A sphere is made from segments, I’m going to work on
edges of this segmants.
Very useful are
loop selecting tools:
ctrl+e + select loop- selects the loop of edges
alt+shift + select another loop (by clicking)- adds another loop
ctrl+e + bridge edge loops- creates the connection between two edge loops
After selecting the areas I can run on them operations likeextrusions, subdivisions:
'e'- extrusion/copy - right click for keeping it in neutral position
'ctrl+r'for adding the subdivision (lines, circles) to th squary surfaces
Another useful tricks and shortcuts that I’m using:
space- for search menu (different in objct and edit mode)
Mesh 3d printing toolbox:
fix intersections(choose all of them, execut command: smooth)
solid(report of holes to fix to have a solid shape)
ffor filling the hole (after choosing the vertexes)
scale to bounds- setting the max length of the object
add modifier - decimate
collapse- ratio - creates low poly
planar- simplifying the similarily positioned faces
s) along z-axis (
z) to (
cfor circular selection
dyntopo- creating details by subdividing, like a brush
apply modifiers(don’t forget to match this box)
I’m going to use Cura. The
file formats that this software reads are:
3MF, OBJ and STL.
I’m loading my stl file, setting up the parameters, checking the symulation and saving back.
For my individual assignment I’m going to print an eyeball. It will be smaller than in reality since I would like it to fit to the shell-shape metal case that I have.
I designed the shape in Blender. I was not sure how small details I can get, so I’ve decided to make a test. The size of the model was 25mm x 25mm x 25mm.
Since the shape is a sphere it has to be printed with a support on the bottom part (where the angle is
less than 45 degrees).
It turned out that the details of iris are too small to print properly and the pupil-hole is being awash by filament. I needed to rework my design and enlarge the important things.
For the next print I’m going to use different printer. It’s Formbytes. This one is a different room and there are no saved settings. One can copy them from local documentation of Fab Lab Barcelona.
*START CODE* G28 ;Home G1 Z15.0 F6000 ;Move the platform down 15mm ;Prime the extruder G92 E0 G1 F200 E3 G92 E0 *END CODE* M104 S0 ; Extruder heating 0 G92 E1 G1 E-1 F300 G28 X0 Y0 ; Go Home position XY M84 ;
This time I decided to test how the quality of the form and structure will looks like without the support. Didn’t work so well. Here the comparison of two prints. The one with support looks better.
Advantages and limitations of 3D printing
Generally speaking it’s a
wonderfull technology and already changed a lot in the industies. It’s
fast tool for prototyping and creating
realistic models (with a combination with 3Dscanning) e.g for architecture of medicine purposes. It’s relatively
haghly available (RepRap concept).
Though there are some limitations as well. The printing process is very often “
glitchy” and one has to repead the jobs many times. On the personal level it can be also time consuming becouse of it’s
dependance on the electricity and long duration. For example if I’mprinting something that tooks 5 hours and there is a power going down in electrical line (happening often in fablabs) just 30 mind before finishing…The machines are requiring
constant maintainance since parts are being overheated, melted, burnt…etc. z z
Beetle Blocks editor http://beetleblocks.com/run/
Meshmixer for fixing th mesh e.g. after 3D scanning by Kinect https://www.meshmixer.com/
- blnder fundamentals https://www.youtube.com/watch?v=kes2qmijy7w
Files made during this assignment: