Week 3
Assignment
- 3D Scanning: Scan an object using either photogrammetry or a 3D scanner.
- 3D Modeling: Design an object with a maximum dimension of 5 cm that would be difficult to manufacture using subtractive methods.
3D Scan
For the first task, I decided to 3D scan my souvenir from Vietnam. Although I originally thought it was Buddha, it is actually called Budai (Fat Buddha).
The Budai was fully colored in black, which caused issues during the initial scans. To improve the results, I had to spray the statuette with white chalk.
Scan Offset Issue
All the details were captured well, but there was a noticeable offset between different scanning angles.
Calibration
To verify if the issue was due to scanner calibration, I tested different objects. After Krištof calibrated the scanner, the issue was resolved.
The Budai was scanned around its yaw and roll axes. After capturing multiple angles, I used auto-mapping to merge scans based on their shared features. Finally, I applied meshing, which interpolated missing vertices to create a solid model.
Final Scan Result
The final 3D scan turned out great!
3D Model
For my 3D model, I wanted to explore Fusion 360 since I had little experience with it. I was particularly interested in print-in-place designs. I took inspiration from a well-known model, the Flexi Rexi.
The model is based on the silhouette of a bird, which I outlined using splines. I then split it into segments based on a parametric width value.
Next, I designed parametric hinges to control the flexibility of the wings and allow better testing.
Printed Result
The final print turned out well considering this was the first attempt.
Print Settings
| Parameter | Value |
|---|---|
| Printer | Elegoo Neptune 4 Max |
| Slicer | OrcaSlicer |
| Material | Creality Black PLA |
| Layer Height | 0.2 mm |
| First Layer Height | 0.2 mm |
| Extrusion Width | 0.4 mm |
| Infill Density | 5% |
| Infill Pattern | Gyroid |
| Extruder Temperature | 210°C (first layer), 205°C (others) |
| Bed Temperature | 60°C |