TPU hook mechanism: Zero Gravity Chair repair

Apparently a lot of people have these chairs. The strings wear out and rip. Nice chair though, why throw it away? Or restring it (yuck). 

TPU hook to the rescue! I included 4 different lengths. Print all four and see where each length wants to be on the chair itself. Remember, the TPU needs to flex and take the load, not the fabric. This is why restringing the chair with Nylon or something isn't going work properly. They're surprisingly string, and TPU stretches nicely. If you really want to go hog-wild, you could spray a UV protective coating on them. I think the chair/fabric will fail before the TPU at that point.

Use a small flathead screwdriver to push the half circle end of the hook through the metal ring (support the ring with your fingers on two side of it's perimeter so you don't jab yourself). If printing 95A TPU on a smooth plate, it may be necessary to reduce the 1st layer line width to .42mm. Since they're small, you can try bumping up the speed. I printed mine with Sainsmart Black 95A durometer TPU. I think this should print fine with Bambu 95a. In the print profile, there is a custom retraction and z-hop setting that may not jive with the Bambu filament (Haven't tried the Bambu filament yet).

Thanks to JoeyRay on the Functional Print Friday Discord server (https://discord.gg/afU5DARr)