GravComb - The Better Gravity Comb

I update this model, so scroll to the bottom to see the update log

GravComb - The fun of a gravity knife + the practicality of a hair comb

I recently found myself forgetting to brush my hair in the morning on multiple occasions, leaving my house looking like I just got out of bed and having to continue that look until I got home, because there's only so far water and your hands can get you. On the bright side, I have this cool fidget knife. But what if… what if I made it a practical fidget knife? Hmm…

And so the GravComb was born.

I HEAVILY modified this model from Printables to create what is now the GravComb. It can fit in my pocket, is fun to play with, but also useful when I forget to brush my hair and realize when I look at myself in the mirror a few hours too late.

It's easy to print, and no support is needed.

USAGE

If you've used a 3D printed gravity knife before, chances are it is smaller than this one in terms of length. The GravComb requires a bit more force to ensure it is fully expelled out of the case, but it's easy to get the hang of.

ARE YOUR BOLTS/SCREWS COMING OUT?

If your bolts/screws are coming out during usage, this typically means your printer probably isn't calibrated the best, or is just coincidental. To mitigate, I simply recommend using glue to hold them in or putting some sort of sticky putty inside (a very small amount). Hot glue works best, but is a bit harder to apply due to the stringing hot glue makes. You can also use a 3D pen.

CASE FLYING OFF DURING USE?
The most likely cause is you're flinging it too hard and/or not doing it correctly. There's no hardware-solution to this issue, so I recommend just practicing for a bit until you get the hang of it and can stop the case from flying off.

Frequently asked Questions [I have gotten no questions lol]

Q: Can you print the comb piece/bristles in PLA?

A: Yes, the entire model can be printed in PLA, however ensure your filament is dry otherwise you'll get mixed results because wet filament is more brittle, which means there is a higher chance of the comb bristles snapping/breaking. Otherwise, the comb bristles are resilient and can bend a little bit. Even when using it roughly, they shouldn't break unless you're intentionally trying to make them break.

Q: Can you print this in TPU?

A: You could I guess? I don't see much of a reason for printing in TPU, and generally speaking you don't want the bristles to be super flexible. PLA works good for the bristles but I imagine TPU would make them too soft and flimsy. Additionally, due to the close proximity of all the bristles, you'd encounter a HUGE amount of stringing with TPU, which is already a notoriously stringy material.

Q: How durable are the bristles?

A: Partially answered in Q1, with PLA they are surprisingly strong and bendy just a tiny bit. They easily survived combing roughly.

Q: Why is “GravComb” engraved on the parts

A: I thought it looked cool. It isn't a brand name or anything but if this gets popular I'm sure someone will release a remix without the engravings.

Update Log:

GravComb V1.1: Engravings removed from parts. Partially redesigned case and base parts. Biggest change is a second comb variation with different bristle design, which is less effective than the normal bristle design but is more “soft” and smooth. Main STL/3MF now contains both comb variants but you can split the model in Bambu/Orca and remove whichever comb you don't want if you prefer.

GravComb V1.0: Initial release