For this assignment, I decided to print a heart from the human torso model.
- I first downloaded the .stl files from the thingyverse website: https://www.thingiverse.com/thing:4601991. The files were separated into the bottom and top of the heart.
- I uploaded the two files (bottom and top of the heart) into the bambu printer and enabled supports for the top half of the heart as it was a bit slanted. The images are shown below in bambu studio.
3. After the hearts were printed, I removed the supports and superglued the two halves together.
4. After gluing the pieces together, I sanded the intersection as it was a bit misaligned. I used a dremel and sandpaper to wet sand the model to get it as smooth as possible.
5. After I was satisfied with the sanding, I spray-painted the models with a pink primer + paint. However after letting it dry for 30 minutes, I found that it really highlighted the gaps I still had between the two halves that were glued together. I decided to use the filler primer to try to get rid of the gaps and let it dry for about 4 hours.
6. I used the dremel to sand the filler down a bit before painting.
7. I used the red acrylic paint and the foam brush to paint my models. The pink base and the filler primer made the model a really cool ombre color when I added the red acrylic. I was originally going for a bright red all around but am really happy with the result of this.
Here is a picture of my table after cleaning:
And, here is my cost analysis:
| Cost Type | Cost | Price | Source | Quantity | Total |
| Materials | PLA Filament | $21.67/kg | Amazon.com | .0705 kg | $1.53 |
| Acrylic Paint | $5.63/fl oz | Amazon.com | 0.25 fl oz | $1.41 | |
| Filler Primer | $7.47/can (11 oz) | Walmart.com | 0.25 oz | $0.17 | |
| Spray Paint | $5.95/can (12 oz) | Homedepot.com | 0.25 oz | $0.12 | |
| Sand Paper | $1.99/sheet | homedepot.com | 5% of 1 sheet | $0.10 | |
| Labor | Prototyping Engineer (You!) | $36/hr | ziprecruiter.com | 4 hrs | $144 |
| Overhead | Facility Cost (Machine Time) | $0.13/kWh | energysage.com | 5 hrs – 1.75 kwh | $0.23 |
| Design | Engineering and Development | $44/hr | ziprecruiter.com | 4 hrs | $176 |
| Total: | $323.56 |
