3D Scanning and printing¶
1. Weekly Brief Summary¶
I tested the performance of the 3D printer in FabLab Kamakura this week and shaped the model with the additive manufacturing process.
In the 3D scan, I used Sense to create a 3D model of my upper body.
2. Weekly Assignment Requirement¶
- Test the design rules for your printer(s).
- Document your work and explain what are the limits of your printer(s) (in a group or individually)
- Design and 3D print an object (small, few cm3, limited by printer time) that could not be easily made subtractively.
- 3D scan an object, try to prepare it for printing (and optionally print it)
- Identify the advantages and limitations of 3D printing
- Apply design methods and production processes to show your understanding of 3D printing.
- Demonstrate how scanning technology can be used to digitize object(s)
- Linked to the group assignment page
- Explained what you learned from testing the 3D printers
- Documented how you designed and made your object and explained why it could not be easily made subtractively
- Documented how you scanned and prepared an object (for 3D printing)
- Included your original design files for 3D printing (both CAD and common format for 3D printing)
- Included your hero shots
3. Group Assignment Link¶
4. Assignment Work Planning¶
Test Sample Output Using the Afinia H400
(a)High quality・・・Toshiki Tsuchiyama
(b)Medium quality・・・Yuki Oka
(c)Low quality・・・Hideo Oguri
(a)Output of 3D model byAdditive manufacturing process
(b)Output of 3D model by Sense
5. Description of Assignment Work¶
Output Test Sample of Afinia H400¶
Since FabLab Kamakura has multiple Afinia H400s, I had decided to test samples of low, medium and high quality to verify the accuracy differences.
(1) Download Test Samples¶
I downloaded test data from Thingiberse in order to check design rule on the Afinia H400.
(2) Reading date¶
Open the software for the Afinia H400.
Open “Build” and load 3D files from “+”.
Select “3D_Printer_test_fixed_stl_3rd_gen.STL” to open the file.
An output accuracy is set from the “nozzle” icons.This time - Layer Thickness : 0.1mm - Infill : 99% - Quality : Fine - No Support
Click “Preview” to display the time until actually outputting and the amount of filaments consumed.
Further, it is preferable to set the temperature of the table to 50℃ or higher when using the filament of the ABS.
The reason for this is that ABS is easy to shave, so if this temperature setting is not performed, the probability of failure is increased.
The temperature of the table can be set from the “panner and driver” icons.
Set the Preheat time to “60min” and click “HEAT”, and wait for 30 minutes to one hour before the table gets warm enough.
Press the print button to display the detailed time required for printing and start printing.
About nine hours later, it succeeded in outputting the test sample.
By setting the infill to 99%, it is a fairly robust model.
The bridge is distorted but has output to the end.
The shape of the arch is almost printed out.
However, the letters indicating the angle of the arch to the letters on the vertical wall were crushed and invisible.
I tried the high quality output this time, but I couldn’t output it well for the time being.
However, the strength of the model was so strong that it was difficult to remove it from the table.
Quality settings are not recommended.
Additive Manufacturing Design¶
This time, I designed the model to be output by 3D printer with Fusion 360.
First, create [CREATE] > [Tours] in the XZ plane.
Duplicate the created “Body” by clicking [CREATE]->[Pattern]->[Circular Pattern].
Go to [Create Sketch] and view the cross section of [Body] and check the inner diameter.
Create a sphere with a diameter of the inner diameter divided by 3 at the origin.
Duplicate the created sphere by selecting [CREATE] > [Pattern] > [Rectangular Pattern].
This model contains three spheres in a circular basket.
This is a shape that cannot be output by cutting modeling.
This is because the end mill cannot shape the sphere inside the basket.
So I decided to output this model with a 3D printer.
Output settings were set as follows: - Layer Thickness : 0.3mm - Infill : 63% - Quality : Nomal
It took about three hours to output this model.
I removed the support material beautifully, but I would like to verify in detail if I can set the support material in a smaller amount.
3D Scan My Upper Body¶
3D Systems Sense Scanner¶
I used the 3D Systems Sense Scanner from FabLab Kamakura to make my upper body 3D data.
(1) Scene of a Picture¶
It took three people to film one upper body.
Easily create 3D models by simply adding Sense to your PC.
This time, I got advice from an instructor who scanned my upper body last time at Fab Academy and took pictures in this style.
(2) Scanned 3D Models¶
Sense creates real-time polygon mesh data from the photos it took, so the first one becomes the front face texture.
My hair was black and reflected light, so I couldn’t take it in well.
When I read the data using Zbrush, it was crushed without any fine detail such as facial shaping.
As a result, the face is distorted when viewed from the side.
So I felt the need to correct it with such modeling software.
6. Description of Important Weekly Learning Outcome¶
Hand scanners such as Sense cannot create clear 3D models, so they need to be fixed with modeling software such as Zbrush.
I’d like to try this out with my 3D modeling.
7. Links to Files and Code¶