====== Open Source Hardware: ======

====== From fibers to fabrics ======

Due to my curiosity, additively fabricate large-scale structures made of water-based materials, I decided to make my own Gelatine-based bio-plastic 3D printer.\\
The first idea was to make a 3D printer which has double extruder controller. First syringe extruder should provide the more rigid amount of material(structure) and the second one should be more flexible(surface). I made my gelatine-based biomaterial with different ratios. I basically keep the same amount of water and glycerine ratio and systematically increase gelatine ratio(1-2-4-8). But despite my many trials when every ratio of gelatine-based materials interface with each other lost their shape and they harmonized with each other. Then I try with corn starch-based bio-material. Starch-based bio-material performance well together.

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====== Bio-Material 3D printer ======

I converted RepRap tricolor mendel printer into bio-plastic 3d printer.

First ı tried many ratio's in the bio-plastic.

{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:img_6034.jpg?nolink&600x450|img_6034.jpg}}

<code>
As you can see from the chart, ı stabilize the amount of water and glycerine and only play with the gelatine amount.
^   ^glycerine ^water ^gelatine |
</code>

^Left |x |20x |4x |

^middle |x |20x |8x |
^left |x |20x |16x |

First ı tried diffrent ratio's. Turned out for ratio 3/4 water gelation is a good performance.

{{:fabricademy2017:students:ayseesindurmaz:es:img_6039.jpg?nolink&400x300|img_6039.jpg}}{{:fabricademy2017:students:ayseesindurmaz:es:img_6041.jpg?nolink&400x300|img_6041.jpg}}

I tried on fabric, I wanted to see if the fabric could take the shape of my lines and would it be bending. But it did not work. Bio-Material is soaked by the fabric and when its dry it completely crack when ı stretch the fabric.

{{:fabricademy2017:students:ayseesindurmaz:es:img_6042.jpg?nolink&400x300|img_6042.jpg}}{{:fabricademy2017:students:ayseesindurmaz:es:img_6043.jpg?nolink&400x300|img_6043.jpg}}

For my 3D printer, I tested out Gelatine based bio-material with other Bio-plastics.Gelatine is not working well with other gelatine based material. They are melting with each other.

{{:fabricademy2017:students:ayseesindurmaz:es:img_6050.jpg?nolink&375x500|img_6050.jpg}}

{{:fabricademy2017:students:ayseesindurmaz:es:img_6049.jpg?nolink&667x500|img_6049.jpg}}

^Cornstarch-based bio-material colored by blackberry ^glycerine ^Cornstarch ^vinegar ^water |
^ratio's |x |3x |2x |12x |
^  |  |  |  |  |
^  |  |  |  |  |

====== Hacking the RepRap ======

Check this link from the reached out whole [[http://reprap.org/wiki/RepRapPro_Tricolour|documentation]] of RepRappro tricolour.n

For control The machine I downloaded [[http://www.pronterface.com/|[[http://www.pronterface.com/|printrun]]]] which is a 3D printing host software suite\\
which talks to your printer and handles the printing process.

{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:3d-printer-pronterface-software.jpg?nolink&640x345|3d-printer-pronterface-software.jpg}}

But this ss for normal fdm settings. What we should is that turn off the bed temp. and extruder temp.

{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:praenter_aentrface.jpg?nolink&800x450|praenter_aentrface.jpg}}

The idea is to first remove filament extruder and replace with my new syringe extruder design. When the servo motor of the extruder moves extra structure that ı designed would push the syringes and create a shape by following pipes.

{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:img_6001.jpg?nolink&600x800|img_6001.jpg}}

so when you remove the filament extruder, you have to run the machine without heating the extruder heat. That's why you have to use G-code m302 code.

[[http://reprap.org/wiki/G-code#M302:_Allow_cold_extrudes|http://reprap.org/wiki/G-code#M302:_Allow_cold_extrudes]]

{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:4x.png?nolink&1144x417}}{{:fabricademy2017:students:ayseesindurmaz:3d_bioprinter:3x.png?nolink&560x517}}

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====== Design syringe extruder ======

There are not many syringe extruder example in the internet actually. I actually used [[https://www.thingiverse.com/thing:475841|this design]] and changed as 3d files to 2d to cut with the laser cutter.

{{:students:ayseesindurmaz:double-pump.jpg?nolink&500x255}}

I took the section views of the parts and extended as one pieces also for carry two syringe at the same time.

{{:students:ayseesindurmaz:5x.png?nolink&567x320}}

{{:students:ayseesindurmaz:img_6069.jpg?nolink&600x450}}{{:students:ayseesindurmaz:img_6071.jpg?nolink&600x800}}

[[https://www.youtube.com/watch?v=pQZ7nPtEXKQ|https://www.youtube.com/watch?v=pQZ7nPtEXKQ]]

[[https://www.youtube.com/watch?v=YrH1otV9-To&feature=youtu.be|https://www.youtube.com/watch?v=YrH1otV9-To&feature=youtu.be]]

.

\\