3d scanning is the process of analyzing a real-world object or environment to collect data on its shape and possibly its appearance (e.g., color). The collected data can then be used to construct digital 3D models.
3D printing, also known as additive manufacturing, is a process of creating three-dimensional objects from a digital file. The creation of a 3D printed object is achieved using additive processes, where successive layers of material are laid down until the object is created. Each of these layers can be seen as a thinly sliced horizontal cross-section of the eventual object.
Week 4 3d scanning For this week’s assignment I used two methods of scanning. The RevoScan V 5.4.0 and the Polycam for iOS 5.1.7 (736779f30) I have used both software in the past and I chose items that I could challenge their limits. I used 4 items for the 3d scanning assignment: one figure of an indigenous south african bird (guinea fawl, one reflective fidget spinner toy, a banana peel and one pack of resistors. The first issue that I encountered is that I could not connect my I-phone 14 device to the revoscan wifi. Thankfully my TA Gert offered his phone to help me do the scannings. For the polycam software I used the same black rotating base for my scannings. 1. Guinea fawl The biggest part of this bird’s body is black with white dots. From my previous experience with this software I knew that black areas are really hard to scan. I even tried to use the circular stickers but the camera was unable to scan the bird’s body. However, its head was scanned since it was blue. The polycam failed. I was not moving my camera and I took consecutive pictures while the base was rotating. Whatever was black was not detected by the camera. 2. Reflective fidget spinner The revocam software was unable to scan this object. This object was scanned like it was a 2d object. The software was able to detect part of the transparent object but was unable to reconstruct its 3d geometry. 3. Pack of resistors The final result is very interesting. Revocam managed to scan the red and the white stripes that connect the resistors together but not the resistors.They were probably very thin to scan. The final result looks like the red stripe is floating. Polycam also failed. The object was assigned as texture to the carton box in the background. Was not at all recognised as an object. 4. Banana peel The banana peel was scanned pretty good. The majority of the geometry seems correct but the texture is not very accurate. At some parts the banana peel was connected to the black base. But overall the geometry was ok. The most interesting part is that the texture of the banana was scanned with remarkable detail. 3d Printing My inspiration for the 3d printing assignment was the Gyroscope. A gyroscope (from Ancient Greek γῦρος gŷros 'round' and σκοπέω skopéō 'to look') is a device used for measuring or maintaining orientation and angular velocity. It is a spinning wheel or disc in which the axis of rotation (spin axis) is free to assume any orientation by itself. When rotating, the orientation of this axis is unaffected by tilting or rotation of the mounting, due to the conservation of angular momentum. https://en.wikipedia.org/wiki/Gyroscope The challenge for this was that I wanted to 3d print the gyroscope in one piece.I started with modeling different iterations of a gyroscope in Rhino 8. At first I designed a test gyroscope only with two rings just to see if printing like this in one piece was possible. I used bambu software to export the G-code. The print was successful. Then I decided that I wanted to design a gyroscope with more rings. The difference here was that I tried to put a sphere in the middle axis. In this iteration the structure needed a supports which were too strong, having as a result to break the connecting pins of the rings. In the next iteration I removed the sphere but when I printed the model the connecting pins did not print. After checking my model again it seemed that the pins that I had designed for this model were in groups in Phino. The last attempt was successful.