For my 3D printing impossible object I chose a pass through spiral pawn that was CADed and uploaded to thingiverse by neilhaileydesign. https://www.thingiverse.com/thing:7003906
The first step was measuring the largest dimension of the capsule. Since my chosen piece was relatively thin I really didn’t have to worry about width. I measured the width of the capsule to be the largest at 1.8 inches of 45.72 mm.
I made a test print on the bambu printer using FDM and it turned out great! The print required no supports so there were no complications.
In my print setting I set the line width to .15mm to increase the precision of the print. The Bambu handled the other three prints well and this entire part of the project was done in a matter of hours with little to no labor required on my part.
The more difficult part came when I attempted my SLA print on the ProForma. This software recommended supports and I decided to allow it to create them. After printing, bathing and curing my piece I used side cutters to remove the supports. However, once I tried to pass one piece through the other, it got stuck halfway and I was unable to pull or push it in either direction. I ended up using the clamp to tryin and push it through but this was ineffective and only got it stuck more. It became clear that SLA would not be the best method of printing for my second type.
So, I joined a group using the SLS printer to save powder, and after some significant cleaning with a wire brush and various sizes of test tube brushes, I was able to get the powder print to work properly.
Lastly, I printed out proper credits for the design and put them in a capsule.
Cost estimate:
1/5 of a PLA role: .2* 14 = $2.8
https://www.amazon.com/OVERTURE-Filament-Consumables-Dimensional-Accuracy/dp/B07PGY2JP1?sr=1-9
Labor: 1:30 at 10/hour = $15
OEDK access: Free with tuition
Total: $17.8
