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Today the class was divided by groups and my group was composed with 4 more Brazilians students.

We configured the file to print. It was an space invader character like this one below:

Space invader.jpg


The printer assigned to our team (5) was Big Read, but it had a broken pulley.

20131205 185811.jpg


We've tried to print the pulley for Big Read using the Gold print, but it wasn't possible because the heater of this machine wasn't raising the temperature.

Consequently, we had to skip this work for the next class.


PSU unit Gold2.jpg


We watched a video describing different forms of metal deposition.

We tried once more to use the Gold Printer, but it was having a problem on z axis right engine.

Our team member Luiz Southier was working on it.

IMG 0026.JPG


Design for Additive Manufacturing presentation.

We learned about the 10 principles of 3D printing:

"Principle one: Manufacturing complexity is free. Principle two: Variety is free. Principle three: No assembly required Principle four: Zero lead time. Principle five: Unlimited design space. Principle six: Zero skill manufacturing Principle seven: Compact, portable manufacturing. Principle eight: Less waste by-product. Principle nine: Infinite shades of materials. Principle ten: Precise physical replication. "


We watched a presentation about 3-D printing of cars. It was really interesting to know how this field of 3D printing is really large.

Also, we printed for the first time our little friend: "the space invader", we needed to make some adjusts because it was making bubbles and messing everything around without create the shape of the space invader. We ended getting this object, but it wasn't looking that good.

When we tried to print the coin constraint piece, the external sizes and internal sizes of this piece was really bad and it didn't work good.



Today we learned the concept of voxel:

"A voxel is a unit of graphic information that defines a point in three-dimensional space. Since a pixel (picture element) defines a point in two dimensional space with its x and y coordinates , a third z coordinate is needed. In 3-D space, each of the coordinates is defined in terms of its position, color, and density. Think of a cube where any point on an outer side is expressed with an x , y coordinate and the third, z coordinate defines a location into the cube from that side, its density, and its color. With this information and 3-D rendering software, a two-dimensional view from various angles of an image can be obtained and viewed at your computer."


After that, our team member Luiz Santos gave us an explanation about 3D printing of human organs. It was fabulous!






Today we did maintenance on the printing bed belt. It wasn't fixed enough and it was moving what was resulting in a bad quality of the printing.

Unfortunately, we couldn't print after the repairs because the computer was being used by another team.


We realized that the axis could be a little different to be more easy make maintenance. (It should penetrate the structure and overlap it to move easily the part that grab the scrollbar)


Today we finished printing the objects to help the catia design developed from students that were learning how use this software.

We printed three pieces together to see how it could work. It wasn't good as I was expected but at least we saved time.


Today morning I went with professor Mike and other students to the showcase of engineering design at BJC to show people how a reprap 3D printer works. The people there were just fascinated with this technology, and I could see some kids around who looked like really interested about this machine. It is great to see it, it is really rewarding.

During class, we could be able to enjoy a great pizza together and say goodbye to this travel around the 3D printing world.

Thank you for everyone who made part of this opportunity, I hope see you guys soon!

And how it is December, Marry Christmas!