Task #03
The task for the third week is to scan an object using either photogrammetry or 3D scanner and to model a 3D object, prepare it for 3D printing and print it.
Photogrammetry
I wanted to try both methods, photogrammetry and 3D scanning. I started with photogrammetry and chose my object of interest to be this figure of a dinosaur.
For photogrammetry itself I used software called KIRI Engine for Android. It works like this. You simply take picture of the object from all sides, at least 20 images and the software will take care of the rest. It generated mesh and with some quick editing in Fusion, I got this 3D model. It is not perfect at all and you can not see much details, but for mobile app with 2D camera input it is pretty good.
3D scanning
We had the oportunity to try a 3D scanner Shining 3D EinScan-SE with a turntable. I wanted to compare its capabilities with the photogrammetry result, so, the object remains the same.
First, I open EXScan S app and proceeded to calibration. The calibration is done using a plate with defined dot pattern which is rotated by the turntable underneath. After the calibration, I started the scannning.
⚙️ Scanning parameters
- Brightness: Max
- HDR: On
- With Turntable: On
- Align Mode: Turntable
- Turntable Steps: 8
- Turntable Speed: 10
- Turntable Turns: One Turn
I scanned the dinosaur twice, standing and laying on a side. I let the software to combine the two scans automatically, which turned out pretty good. In post-processing, I deleted some extra points generated from the dotted plate and created a watertight mesh model from the point cloud. I made some final editing and exported the model in .obj format. I opened the model in Fusion to share it and include it in my page.
And the final 3D model.
3D printing
For my 3D printing project I modeled a key hanger in Fusion. I got my inspiration from Redbull Ring in Austria, where I have been with my friends two years ago. We all follow formula 1 and I wanted to make something thematic and practical into our student apartment.
I exported my 3D model .3mf file type. I opened that in Prusa Slicer and prepared it for printing. After slicing I checked if everything looks good for printing and then sent the g-code to the printer.
⚙️ 3D printing parameters
- Print settings: 0.20mm SPEED
- Filament: Generic PLA
- Printer: Original Prusa i3 MK3
- Infill: 20%
- Brim: Yes
And this is how it turned out.
