When I was originally assigned this project I had no idea what I wanted to make and how to make it impossible. I started looking at old Engi 210 assignments, sculptures, and artworks. After looking for some inspiration I decided on a knot, but a knot that existed as one piece, so it would be impossible to carve or create through other means. I discovered the “Rolling Knot” by Kitwallace on Thingiverse and instantly decided I wanted to make this. https://www.thingiverse.com/thing:230557
Figure 1: Rolling Knot 2D render
For this project, I used FDM and SLA printing. I printed 4 copies using FDM and the last copy using SLA printing. For FDM printing I used the Bambu X1 Carbon 3D printer with PLA filament. For SLA printing I used the Formlabs Form 3 printer.
For FDM printing I encountered no problems and it was very smooth. The process I followed can be found below.
- I opened Bambu Studio Slicer
- Imported my STL file
- Scaled the file down to fit in the capsule
- Set the layer height to 0.15 mm
- Sliced the file and added supports
- Finally I sent it to the Bambu X1 Carbon 3D printer #9.
The prints came out as I expected and the supports were easy to pop off with my fingers.
Figure 2: FDM Print of Rolling Knot
For SLA printing I encountered no problems and it was very smooth. The process I followed can be found below.
- I opened the PreForm Slicer
- Imported my STL file
- Scaled the file down to fit in the capsule
- Automatically oriented and generated supports
- Sent it to the Formlabs Form 3 Printer
- Wash the print for 15 minutes
- Cure the print for 1 hour at 70 degrees Celsius first letting the machine Pre-heat for 12 minutes.
- Remove supports once done.
The print took 3 hours and 30 minutes and came out great with no issues or defects.
Cost:
- Materials: Free provided by OEDK
- Labor: $30 (2 hours @ $15/hour)
Total: $30
