1. About 3D printers and 3D scanning 1.1 3D printers and their advantages and disadvantages
A 3D printer is an addition process of laminating resins. On the other hand, CNC used for substrate processing is processing of subtraction by cutting material with a cutter. Comparing 3D printers with CNC, the following merits and demerits are considered for processing. Merit
-3D printer can produce free form if design data can be obtained. It is also possible to mold parts where knives do not enter.
- Easy to shape ideas, suitable for high speed prototyping. Demerit
- It takes printing time to laminate resin.
- At this stage, the material is limited.
1.2 Advantages and disadvantages of 3D scanning.
By using a 3D scanner, 3D scanning can directly create 3D data from the real thing. Merit
- The shape of the real thing can be captured as it is. Demerit
-Compared to -3D-CAD, correction and reproduction of details are serious. Both 3D printers and 3D scanners need to be used according to the purpose.
2. 3D print performance
2.1 Test parts
In order to check the performance of 3D printers, test parts were created.
I increased the diameter at 0.5 mm intervals from 0.5 mm to 5 mm and reduced the height. I also checked the printing of letters.
2.2 Print test Da Vinci MiniW of XYZ Printing Co. was used as a 3D printer. The specifications ofThe material is PLA resin. Lamination pitch Maximum 0.1 mm (100 micron),Printing speed fastest 100 mm / sec.
the printer are shown below.
Output was maximum printing accuracy (0.1 mm).
Output result
Output time 24 minutes 37 seconds
3. Parts making full use of the characteristics of 2.3D printers
3.1 Part design
Designed a mini version of the Omni Wheel as a part that takes advantage of the characteristics of the 3D printer.
Fusion 360 was used for the wheel design.
I used the previous parametric method for wheel placement. The diameter of the wheel is 40 mm. The diameter of the roller was 10 mm. Twelve rollers were arranged and designed to rotate around the axis.
3.2 Output of parts
Using an ABS resin, the stacking pitch was output at 0.1 mm.
I removed the support material and filed the file. I rotated it after completion, I could confirm that I got an omni wheel that moves 360 degrees.
4. 3 D scan
There is a famous temple called Zenkoji in the neighborhood of the our lab. I decided to scan the Buddha statue of this temple.
Scanning of Buddha images was done with two methods, one using a digital camera and one using 3D scanner. 3.1 3D scan with digital camera
I went around the statue of Buddha and shot 30 photos. After taking a picture, I converted it to 3D object using Autodesk's Recap 360.
The first conversion failed. It is because the background trees and buildings were also taken in.
Then, I created an image with the background deleted and converted it into a 3D object.
A beautiful 3D object was synthesized as shown in the figure.
