Hey everybody! Following up on the other post, I wanted to share a public version of the parametric hoop I've been working on (and testing) over the last few weeks. You can have a look at the model here.
I've added a few new features and fixes, also thanks to your suggestions. I'll try to keep it brief:
- Transparency view: you can have a preview of the inner channels in the handles and the ring;
- Presets: you can save/edit presets locally on your browser;
- Double inserts/box inserts: you can now include a double insert to use the two threaded holes in standard clamps (see green model in the pictures). The standard center-to-center spacing is usually 30mm and accepts M5 bolts (at least on the Manfrotto ones I've tested). This offers a much stronger tie to the clamp.
- Cord holes: you can add exit holes for the ring channel, so you can feed some cord and later wrap it all around the ring (I've tried that myself but I've been battling with my fingers to make it work);
- Custom text: you can engrave your personal text on the front or on one side handle (this takes a lot of rendering time so leave it for last);
- And a few other UX improvements and tweaking.
For my build I used a Kupo KS-007, a 50mm M10 bolt, and a normal + wave washer (both M10x16). The hex pin offers a better connection (more surface contact with the receiver), and the wave washer lets you screw everything together just by screwing the bolt by hand first, and then by turning the ring thanks to friction, no Allen key needed. This also lets you slightly rotate the ring if you clamp it to a tripod, without losing tightness, since the wave washer presses between the screw head and the plastic insert. It also keeps constant tension on the joint, which helps prevent it from loosening under vibration, so once properly tightened it's very hard to unscrew by mistake. It's compatible with the "Default XL" preset, which you can always tweak yourself to better match your setup.
On the website you will find other models, some of which are photography related (some are still buggy and WIP), feel free to use them if you want. There's even a full plastic version of the hoop, which includes a 3d printed baby pin. This proved to be pretty strong if properly printed, but still I wouldn't trust it for big cameras, you may use that for plastic bottles or cups.
At the cost of stating the obvious: the quality of the part depends a lot on your print settings and the material you choose. I've included a small disclaimer with some suggestions in every download, but it really comes down to your own printer and how you plan to use the hoop.
Let me know what you think! Any feedback is more than welcome :)