This week assignement was to design and 3D print an object (small, few cm) that could not be made subtractively and 3D scan an object (and optionally print it).
Materials and :
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I was wondering what i can you do with a 3d printer that you can't do with other machines. For that i borrow and ideia from Larry (the T.A.) to put things inside the print before they end and get closed. So i decide to do a shaking instrument and for that i choose the egg, a simple form that is strong and can be printed without infill (inside supports). So i designed in Rhinoceros using the Moss Egg diagram.
The Moss Egg Diagram.
Egg made on Rhinoceros, three types wth different measures
For the first design i tryed to print the beans (for making the noise) already in place, but that was not possible, i thought that the extruder would make the plastic into a small ball of plastic when you let it print on air. But what happend in the end is the plastic falls but you get a very fine line of extruding plastic, and everything becomes a mess like a spider web.
Tried to print the Egg with the filling! No go!
So in the end i found out that you can just pause the print in the middle (actually press "change fillament" so that the print head moves away from the print) and fill it with solder pieces, than unpause it and let it finish the print.
Printing a test egg
Cutting the solder for the shaker
A small amount a big sound
Putting the solder on the egg, first "pause" the printer on the option: change fillament
The finished Egg!
Polishing the 3d print, with a dremel, a felt tip and wax
I tryed to use other fillaments, but just some worked, we found out in the end that they all had humidity inside, so we put them in sealed plastic bags with dessecant, and after a week most of them wore working again.
Testing other fillaments. Humidity was to much.
I experimented changing the fillament color too and it worked fine. Didn't work to print PLA with ABS (tryed to print an yellow and black egg for Bert, As220 founder), but only PLA with PLA (different collors).
Trying to change the color of the fillaments
Works great.
Humm not so much, to thin just one shell of 0.2mm
And and angle
Pretty Mini Egg!
Tried to combine two types of material (ABS and PLA). No go!
For my final egg i printed in transparent fillament and putted colored beans (solder, dessecant and other fillament colors) inside.
Transparent Egg!
With color bids inside!
UPDATE: I also did a big egg shaker on the 3d printer for Bert (As220 founder) on the make something Big Week
VIDEOSI Scanned (with the help of Lara) and printed Me. Myself. Something strange but sattisfing.
We used the Sense scanner. It was difficult at first but then we get a hold of professional lightning and a good computer (the sense uses a lot of processing memory and RAM) and for some reason is not suitable for small objects. One of the problems we got was the subject moving or losing the track of the object while scanning (that get a lot better after we changed computers).
Lara and Avi scanning Chris with a camera head
After the scan the model nedded a little twikking, so i used Rhinoceros and MeshMixer for that. Rhino to put a base an a sole on the shoes and Meshmixer to fill holes and edit the mesh of the model (the software has a great set of sculpt tools to push, pull, drag, smooth, etc.).
Putting a base on the model
Fixing the model on MeshMixer
The first print, with supports generated on Makerbot desktop
The first print, with supports generated on Makerbot desktop
The first print, after cleaning the supports
I didn't like the suppports created by Makerbot desktop so i tryed to used the ones that MeshMixer creates, they seamed, on the software to be better, because they whore bigger and structured like a tree branch. But i think that these work better on SLA ( printer
Second print with supports generated in MeshMixer
Second print with supports generated in MeshMixer
Removing the support (a lot off)dangerous too
But the supports left permanent mark
On all the model...
Using a Dremel to sand the supports
The sanding left behind the wax
Back of the model
Much better
I printed a small vase that i downloaded from Thingverse. And on the next class Simon asked me if i had designed the vase and how i did that, so i got intereseted in triying to see if i could in fact design the vase and after a few tries on Rhinoceros i did. So a little backwards oldscholl digitalization.
The Original Vase
My 3d model
In the end Larry build a Lazy Susan so we can scan objects more easily, he bought a bearing at home depot made for Lazy Susans and cutted two bases in the Shopbot CNC, one for the bottom and other for the pot, he also made a pattern so the software could identiry more easyly the base and gears for implementing a motor in the future.
Helping Larry with the CNC
The Lazy Susan ready to be used