The Limit stamp (lim)
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When I was taking a calculus class my junior year here at UNH, my professor (an amazing teacher/tutor) spoke about how much she would love if someone made her a limit stamp. I had forgotten about her plead to the class until I came to her with another prop idea for the 3D printing prop assignment. Without getting my idea fully out in words, she stopped me and said: " Please tell me, you are making my limit stamp". It had been decided: the prop assignment for me would be the limit stamp. What is a limit in calculus? you ask. Per Khan academy, a limit describes how a function behaves near a point. The limit stamp has a rotating stamp base that allows for three different sizes of the phrase 'lim'. Attached to the rotating triangle is a rod that sticks out of the stamp. The rod is attached to the rotating triangle stamp base and allows for movement between stamp sides. Magnets were included in the design and print to allow for each stamp face a fixed state while being used. The stamp material used was not PLA but TPU, printed separately. The print was completed in 4 parts: 1) Base body with magnet, 2) dowel with magnets, 3) triangle for stamp, and 4) 3 stamp faces. for the forth print, the three stamp faces were printed with TPU not PLA. 1)Base body print: Time: 7 hours, 2 minutes Type: PLA Amount: 95 g Support: Yes, needed 2)Dowel with magnets (3 magnets) Time: 17 minutes Type: PLA Support: No *During print, pause print at layer 12 to insert 3 magnets. Super glue may be needed to keep magnets in place. 3)Triangle Stamp: Time: 59 minutes Type: PLA Support: Yes 4)Stamp faces: Time: 2 minutes for each Type: TPU * Additional settings were altered, slower print speed and lower bed heating* Support: No Details can be found on my blog on how I created each part: http://3dprinting.illustratingmath.com/2019/12/11/the-limit-stamp-prop/
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