Fabrication

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Autonomatic_home. Imagine the blog, INFLATEABLE STRUCTURE  DIA/Dessau/ss 2011.... Solid Freeform Fabrication in Tissue Engineering. A Technology for Directly Fabricating 3D Living Tissue...

Solid Freeform Fabrication in Tissue Engineering

Creating living tissue in complex geometries is a challenging issue facing the tissue engineering community. Traditional tissue engineering techniques result in living tissue of simple, often 2D geometries. By harnessing the capabilities of Solid-Freeform Fabrication (SFF) – also known as Rapid Prototyping (RP) – we can create living tissue of arbitrary 3D shapes directly from computer-aided design (CAD) data.

Not only can patient-specific living implants be created directly from medical imaging data, but the complex 3D multi-tissue configurations of native structures can be more accurately reproduced by using SFF. For example, intervertibral discs have a very specific 3D overall shape and spatial distribution of multiple cell types; traditional tissue engineering techniques would have great difficulty reproducing these types of structures. Novel Material The "printing ink" is a cell-seeded alginate hydrogel. Printing Platform.

Fabric / Concrete Cloth Testing. The past two weeks we decided to get our hands dirty, and take a stab at material testing.

Fabric / Concrete Cloth Testing

We tested the fabric that we have been using to create the HYBIOS and several other fabrics, such as cotton and scrim. We used a meter to measure the weight devised from pulling, as well as the displacement threshold before the material would break. The materials were tested on a 1000x1000x1000 mm frame. Concrete cloth was tested at 4 mm thickness. The maximum displacement was about 400 mm, after which the concrete cloth would break. A curvature analysis and a displacement calculation were produced. The Material was hydrated and left to set completely for about 24 hours.

Many problems were encountered, but the material successfully deformed using the pulling and tensioning method. Styrofoam Robot // Jonas Pfeil. -> Want to order your own shape?

Styrofoam Robot // Jonas Pfeil

Back the project on Indiegogo! Der Kritzler. In May I moved into a new office with the great guys of The Future of Everything.

Der Kritzler

The office has really nice big windows and we thought about what we could do with them. I remembered hektor, this super cool 2D drawing machine. What if that thing could draw directly onto the window? So, here is Der Kritzler (kritzeln is german for scribble). Parts Here is a list of parts needed: Motor mount and pen holder, laser cut MDF, 5mm Formulor (german partner of Ponoko)2 stepper motors, NEMA 17. e.g. Most sources are german, but I assume that all parts are pretty common. The SVG to cut the motor mount and the pen holder was my first attempt to have something laser cut. Assembling The motor is mounted with its axis towards the motor holder. Assembling the pen holder is quite easy. Electronics I am using the drivers with quarter stepping, which means 800 steps per revolution of the motor.

The driver board is connected as follows: The connections from the Arduino are: Shape to Fabrication - Generative Design and Digital Fabrication in Architecture - in practise.